Grub not loading
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About a month ago I installed ubuntu 14.04 on my computer. I did not replace the Windows 8 that I was previously using. While ubuntu has by and large been working very well, one issue is that grub does not load when I restart my computer. If I want to switch operating systems, I have to restart my computer and then go into the BIOS and switch the boot mode from CSM to UEFI (or vice-versa).
While it is not the end of the world to have to do this, it would be more convenient for me to have grub. Also, I am planning to install another Linux distro in the near feature, and without grub working I am worried that I won't be able to switch between my Linux distros.
Does anyone have any suggestions for getting grub to work?
dual-boot grub2
asked Feb 12 '15 at 13:56
Alessandro Power
1261312
add a comment |
up vote
1
down vote
favorite
About a month ago I installed ubuntu 14.04 on my computer. I did not replace the Windows 8 that I was previously using. While ubuntu has by and large been working very well, one issue is that grub does not load when I restart my computer. If I want to switch operating systems, I have to restart my computer and then go into the BIOS and switch the boot mode from CSM to UEFI (or vice-versa).
While it is not the end of the world to have to do this, it would be more convenient for me to have grub. Also, I am planning to install another Linux distro in the near feature, and without grub working I am worried that I won't be able to switch between my Linux distros.
Does anyone have any suggestions for getting grub to work?
dual-boot grub2
asked Feb 12 '15 at 13:56
Alessandro Power
1261312
I had a similar problem last month, however I also had no gui which made the problem tougher. I did get grub working using a tutorial. While I don't have that link, I do have a link that should fix your grub using a graphical tool. howtogeek.com/114884/how-to-repair-grub2-when-ubuntu-wont-boot I hope that helps
– OnethingSimple
Feb 16 '15 at 13:48
Try runningsudo grub-installandsudo update-grubif you haven't already. And could you post the output of these commands and the contents of/etc/default/grub? Also, sometime Windows CHKDSK corrupts the boot partition
– texasflood
Feb 18 '15 at 20:34
sudo grub-installdoesn't work; I'm prompted to specify an install device.
– Alessandro Power
Feb 19 '15 at 4:51
I read somewhere that you have to decide on either UEFI or compatible (CSM) mode before installing, as the OS will only be able to work with the configuration it had when it was installed. So if you used different settings to install your two systems, it looks bad. This does not have to be true, but I am pretty sure. It is the same for hard disks in SATA or legacy IDE mode.
– Byte Commander
Feb 20 '15 at 20:40
@AlessandroPower first update GRUB from live cd asupdate-grubthen in your BIOS enable Legacy also and just when your system is booting press [esc]key and choose boot options as Ubuntu now you will see GRUB
– Mudit Kapil
Feb 22 '15 at 16:34
add a comment |
up vote
1
down vote
favorite
up vote
1
down vote
favorite
About a month ago I installed ubuntu 14.04 on my computer. I did not replace the Windows 8 that I was previously using. While ubuntu has by and large been working very well, one issue is that grub does not load when I restart my computer. If I want to switch operating systems, I have to restart my computer and then go into the BIOS and switch the boot mode from CSM to UEFI (or vice-versa).
While it is not the end of the world to have to do this, it would be more convenient for me to have grub. Also, I am planning to install another Linux distro in the near feature, and without grub working I am worried that I won't be able to switch between my Linux distros.
Does anyone have any suggestions for getting grub to work?
dual-boot grub2
asked Feb 12 '15 at 13:56
Alessandro Power
1261312
About a month ago I installed ubuntu 14.04 on my computer. I did not replace the Windows 8 that I was previously using. While ubuntu has by and large been working very well, one issue is that grub does not load when I restart my computer. If I want to switch operating systems, I have to restart my computer and then go into the BIOS and switch the boot mode from CSM to UEFI (or vice-versa).
While it is not the end of the world to have to do this, it would be more convenient for me to have grub. Also, I am planning to install another Linux distro in the near feature, and without grub working I am worried that I won't be able to switch between my Linux distros.
Does anyone have any suggestions for getting grub to work?
dual-boot grub2
dual-boot grub2
asked Feb 12 '15 at 13:56
Alessandro Power
1261312
asked Feb 12 '15 at 13:56
Alessandro Power
1261312
asked Feb 12 '15 at 13:56
Alessandro Power
1261312
asked Feb 12 '15 at 13:56
Alessandro Power
1261312
asked Feb 12 '15 at 13:56
Alessandro Power
1261312
1261312
I had a similar problem last month, however I also had no gui which made the problem tougher. I did get grub working using a tutorial. While I don't have that link, I do have a link that should fix your grub using a graphical tool. howtogeek.com/114884/how-to-repair-grub2-when-ubuntu-wont-boot I hope that helps
– OnethingSimple
Feb 16 '15 at 13:48
Try runningsudo grub-installandsudo update-grubif you haven't already. And could you post the output of these commands and the contents of/etc/default/grub? Also, sometime Windows CHKDSK corrupts the boot partition
– texasflood
Feb 18 '15 at 20:34
sudo grub-installdoesn't work; I'm prompted to specify an install device.
– Alessandro Power
Feb 19 '15 at 4:51
I read somewhere that you have to decide on either UEFI or compatible (CSM) mode before installing, as the OS will only be able to work with the configuration it had when it was installed. So if you used different settings to install your two systems, it looks bad. This does not have to be true, but I am pretty sure. It is the same for hard disks in SATA or legacy IDE mode.
– Byte Commander
Feb 20 '15 at 20:40
@AlessandroPower first update GRUB from live cd asupdate-grubthen in your BIOS enable Legacy also and just when your system is booting press [esc]key and choose boot options as Ubuntu now you will see GRUB
– Mudit Kapil
Feb 22 '15 at 16:34
add a comment |
I had a similar problem last month, however I also had no gui which made the problem tougher. I did get grub working using a tutorial. While I don't have that link, I do have a link that should fix your grub using a graphical tool. howtogeek.com/114884/how-to-repair-grub2-when-ubuntu-wont-boot I hope that helps
– OnethingSimple
Feb 16 '15 at 13:48
Try runningsudo grub-installandsudo update-grubif you haven't already. And could you post the output of these commands and the contents of/etc/default/grub? Also, sometime Windows CHKDSK corrupts the boot partition
– texasflood
Feb 18 '15 at 20:34
sudo grub-installdoesn't work; I'm prompted to specify an install device.
– Alessandro Power
Feb 19 '15 at 4:51
I read somewhere that you have to decide on either UEFI or compatible (CSM) mode before installing, as the OS will only be able to work with the configuration it had when it was installed. So if you used different settings to install your two systems, it looks bad. This does not have to be true, but I am pretty sure. It is the same for hard disks in SATA or legacy IDE mode.
– Byte Commander
Feb 20 '15 at 20:40
@AlessandroPower first update GRUB from live cd asupdate-grubthen in your BIOS enable Legacy also and just when your system is booting press [esc]key and choose boot options as Ubuntu now you will see GRUB
– Mudit Kapil
Feb 22 '15 at 16:34
I had a similar problem last month, however I also had no gui which made the problem tougher. I did get grub working using a tutorial. While I don't have that link, I do have a link that should fix your grub using a graphical tool. howtogeek.com/114884/how-to-repair-grub2-when-ubuntu-wont-boot I hope that helps
– OnethingSimple
Feb 16 '15 at 13:48
I had a similar problem last month, however I also had no gui which made the problem tougher. I did get grub working using a tutorial. While I don't have that link, I do have a link that should fix your grub using a graphical tool. howtogeek.com/114884/how-to-repair-grub2-when-ubuntu-wont-boot I hope that helps
– OnethingSimple
Feb 16 '15 at 13:48
Try running
sudo grub-install and sudo update-grub if you haven't already. And could you post the output of these commands and the contents of /etc/default/grub? Also, sometime Windows CHKDSK corrupts the boot partition– texasflood
Feb 18 '15 at 20:34
Try running
sudo grub-install and sudo update-grub if you haven't already. And could you post the output of these commands and the contents of /etc/default/grub? Also, sometime Windows CHKDSK corrupts the boot partition– texasflood
Feb 18 '15 at 20:34
sudo grub-install doesn't work; I'm prompted to specify an install device.– Alessandro Power
Feb 19 '15 at 4:51
sudo grub-install doesn't work; I'm prompted to specify an install device.– Alessandro Power
Feb 19 '15 at 4:51
I read somewhere that you have to decide on either UEFI or compatible (CSM) mode before installing, as the OS will only be able to work with the configuration it had when it was installed. So if you used different settings to install your two systems, it looks bad. This does not have to be true, but I am pretty sure. It is the same for hard disks in SATA or legacy IDE mode.
– Byte Commander
Feb 20 '15 at 20:40
I read somewhere that you have to decide on either UEFI or compatible (CSM) mode before installing, as the OS will only be able to work with the configuration it had when it was installed. So if you used different settings to install your two systems, it looks bad. This does not have to be true, but I am pretty sure. It is the same for hard disks in SATA or legacy IDE mode.
– Byte Commander
Feb 20 '15 at 20:40
@AlessandroPower first update GRUB from live cd as
update-grub then in your BIOS enable Legacy also and just when your system is booting press [esc]key and choose boot options as Ubuntu now you will see GRUB– Mudit Kapil
Feb 22 '15 at 16:34
@AlessandroPower first update GRUB from live cd as
update-grub then in your BIOS enable Legacy also and just when your system is booting press [esc]key and choose boot options as Ubuntu now you will see GRUB– Mudit Kapil
Feb 22 '15 at 16:34
add a comment |
4 Answers
4
active
oldest
votes
up vote
0
down vote
If you follow this, unfortunately german instructions, it might work.
So first you have to install some packages, namely linux-signed-generic grub-efi-amd64-signed shim-signed. This will install the signed kernel, your old kernel will be kept and works as a fallback if you boot with EFI disabled.
After that, update grub by running sudo grub-install --uefi-secure-boot. If you get an error message, run it with sudo grub-install --uefi-secure-boot --force.
After that, your system should boot in both BIOS modes. Please not that installing a new kernel while the system is booted in CSM or legacy mode, the relevant package linux-signed-generic will be removed and you have to repeat the steps above.
answered Feb 16 '15 at 14:11
octavian
15818
Unfortunately I received an error after runningsudo grub-install --uefi-secure-boot --force:grub-install: error: install device is not specified.
– Alessandro Power
Feb 17 '15 at 16:22
For the package installation, did you want me to just runsudo apt-get install linux-signed-genericandsudo apt-get install grub-efi-amd64-signed shim-signed?
– Alessandro Power
Feb 17 '15 at 16:23
Yes,sudo apt-get install linux-signed-generic grub-efi-amd64 shim-signedis correct, as long as you have a 64-bit system, of course. I made a mistake, I am sorry.grub-installexpects a device, so assuming you only have one harddrive, the command would besudo grub-install --uefi-secure-boot /dev/sda.
– octavian
Feb 17 '15 at 17:01
Unfortunately this did not work either. I was only able to boot Windows in UEFI mode.
– Alessandro Power
Feb 17 '15 at 19:35
add a comment |
up vote
0
down vote
I had a lot of problems when I installed Ubuntu on my lap(the UEFI mode was on). Someone told me to uninstall Ubuntu and reinstall it after disabling UEFI. Needless to say that sure did work. You said you installed it before one month, I believe the problem didn't came to exist just now. If there is still time for reinstall try that one too.
answered Feb 19 '15 at 12:45
theDistantStar
183129
I may try this in the future, but I do not have any immediate plans to reinstall ubuntu.
– Alessandro Power
Feb 19 '15 at 21:32
add a comment |
up vote
0
down vote
I dont know if this will help but have you tryed using the disk to repair grub?
I'm sorry if this sounds basic but this has helped me with a problem sorta similar
answered Feb 22 '15 at 15:34
popcorn9499
4410
add a comment |
up vote
0
down vote
You can boot Ubuntu only in UEFI because you have installed Ubuntu in UEFI mode while Your windows installation is in Legacy (Not EFI) Mode.
To Avoid Such issues you need to Install Ubuntu in UEFI mode only if Windows is installed in UEFI mode or Ubuntu is the only operating system on your computer. If your windows is installed in Legacy mode, then you must install Ubuntu in Legacy mode.
To solve this issue you need to convert Ubuntu from UEFI mode to Legacy mode.
Please follow below instructions to do it.
1) Start Boot-Repair, click on Advanced options, go to the GRUB location tab.
2) Untick the Separate /boot/efi partition option & Click the Apply button.
3) Set up your BIOS so that it boots the HDD in Legacy mode
That's it.
answered Feb 22 '15 at 16:15
Ketan Patel
10.1k94365
1
Actually my Windows is installed in UEFI mode while ubuntu is installed in Legacy mode. How would that change your instructions?
– Alessandro Power
Feb 22 '15 at 19:41
If Ubuntu is installed in Legacy mode, then you don't have to change BIOS setting to load Grub from Legacy to UEFI.
– Ketan Patel
Feb 23 '15 at 7:14
Step 2 produces the following error:GPT detected. Please create a BIOS-Boot partition (>1MB, unformatted filesystem, bios_grub flag). This can be performed via tools such as Gparted. Then try again. Alternatively, you can retry after activating the [Separate /boot/efi partition:] option.
– Alessandro Power
Feb 23 '15 at 14:08
You need to create small partition for bios boot. Use Ubuntu 14.04 live DVD and Gparted tool to create it. Assign partition bios_grub, apply changes and repeat Step 2.
– Ketan Patel
Feb 24 '15 at 2:45
add a comment |
4 Answers
4
active
oldest
votes
4 Answers
4
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
0
down vote
If you follow this, unfortunately german instructions, it might work.
So first you have to install some packages, namely linux-signed-generic grub-efi-amd64-signed shim-signed. This will install the signed kernel, your old kernel will be kept and works as a fallback if you boot with EFI disabled.
After that, update grub by running sudo grub-install --uefi-secure-boot. If you get an error message, run it with sudo grub-install --uefi-secure-boot --force.
After that, your system should boot in both BIOS modes. Please not that installing a new kernel while the system is booted in CSM or legacy mode, the relevant package linux-signed-generic will be removed and you have to repeat the steps above.
answered Feb 16 '15 at 14:11
octavian
15818
Unfortunately I received an error after runningsudo grub-install --uefi-secure-boot --force:grub-install: error: install device is not specified.
– Alessandro Power
Feb 17 '15 at 16:22
For the package installation, did you want me to just runsudo apt-get install linux-signed-genericandsudo apt-get install grub-efi-amd64-signed shim-signed?
– Alessandro Power
Feb 17 '15 at 16:23
Yes,sudo apt-get install linux-signed-generic grub-efi-amd64 shim-signedis correct, as long as you have a 64-bit system, of course. I made a mistake, I am sorry.grub-installexpects a device, so assuming you only have one harddrive, the command would besudo grub-install --uefi-secure-boot /dev/sda.
– octavian
Feb 17 '15 at 17:01
Unfortunately this did not work either. I was only able to boot Windows in UEFI mode.
– Alessandro Power
Feb 17 '15 at 19:35
add a comment |
up vote
0
down vote
If you follow this, unfortunately german instructions, it might work.
So first you have to install some packages, namely linux-signed-generic grub-efi-amd64-signed shim-signed. This will install the signed kernel, your old kernel will be kept and works as a fallback if you boot with EFI disabled.
After that, update grub by running sudo grub-install --uefi-secure-boot. If you get an error message, run it with sudo grub-install --uefi-secure-boot --force.
After that, your system should boot in both BIOS modes. Please not that installing a new kernel while the system is booted in CSM or legacy mode, the relevant package linux-signed-generic will be removed and you have to repeat the steps above.
answered Feb 16 '15 at 14:11
octavian
15818
Unfortunately I received an error after runningsudo grub-install --uefi-secure-boot --force:grub-install: error: install device is not specified.
– Alessandro Power
Feb 17 '15 at 16:22
For the package installation, did you want me to just runsudo apt-get install linux-signed-genericandsudo apt-get install grub-efi-amd64-signed shim-signed?
– Alessandro Power
Feb 17 '15 at 16:23
Yes,sudo apt-get install linux-signed-generic grub-efi-amd64 shim-signedis correct, as long as you have a 64-bit system, of course. I made a mistake, I am sorry.grub-installexpects a device, so assuming you only have one harddrive, the command would besudo grub-install --uefi-secure-boot /dev/sda.
– octavian
Feb 17 '15 at 17:01
Unfortunately this did not work either. I was only able to boot Windows in UEFI mode.
– Alessandro Power
Feb 17 '15 at 19:35
add a comment |
up vote
0
down vote
up vote
0
down vote
If you follow this, unfortunately german instructions, it might work.
So first you have to install some packages, namely linux-signed-generic grub-efi-amd64-signed shim-signed. This will install the signed kernel, your old kernel will be kept and works as a fallback if you boot with EFI disabled.
After that, update grub by running sudo grub-install --uefi-secure-boot. If you get an error message, run it with sudo grub-install --uefi-secure-boot --force.
After that, your system should boot in both BIOS modes. Please not that installing a new kernel while the system is booted in CSM or legacy mode, the relevant package linux-signed-generic will be removed and you have to repeat the steps above.
answered Feb 16 '15 at 14:11
octavian
15818
If you follow this, unfortunately german instructions, it might work.
So first you have to install some packages, namely linux-signed-generic grub-efi-amd64-signed shim-signed. This will install the signed kernel, your old kernel will be kept and works as a fallback if you boot with EFI disabled.
After that, update grub by running sudo grub-install --uefi-secure-boot. If you get an error message, run it with sudo grub-install --uefi-secure-boot --force.
After that, your system should boot in both BIOS modes. Please not that installing a new kernel while the system is booted in CSM or legacy mode, the relevant package linux-signed-generic will be removed and you have to repeat the steps above.
answered Feb 16 '15 at 14:11
octavian
15818
answered Feb 16 '15 at 14:11
octavian
15818
answered Feb 16 '15 at 14:11
octavian
15818
answered Feb 16 '15 at 14:11
octavian
15818
15818
Unfortunately I received an error after runningsudo grub-install --uefi-secure-boot --force:grub-install: error: install device is not specified.
– Alessandro Power
Feb 17 '15 at 16:22
For the package installation, did you want me to just runsudo apt-get install linux-signed-genericandsudo apt-get install grub-efi-amd64-signed shim-signed?
– Alessandro Power
Feb 17 '15 at 16:23
Yes,sudo apt-get install linux-signed-generic grub-efi-amd64 shim-signedis correct, as long as you have a 64-bit system, of course. I made a mistake, I am sorry.grub-installexpects a device, so assuming you only have one harddrive, the command would besudo grub-install --uefi-secure-boot /dev/sda.
– octavian
Feb 17 '15 at 17:01
Unfortunately this did not work either. I was only able to boot Windows in UEFI mode.
– Alessandro Power
Feb 17 '15 at 19:35
add a comment |
Unfortunately I received an error after runningsudo grub-install --uefi-secure-boot --force:grub-install: error: install device is not specified.
– Alessandro Power
Feb 17 '15 at 16:22
For the package installation, did you want me to just runsudo apt-get install linux-signed-genericandsudo apt-get install grub-efi-amd64-signed shim-signed?
– Alessandro Power
Feb 17 '15 at 16:23
Yes,sudo apt-get install linux-signed-generic grub-efi-amd64 shim-signedis correct, as long as you have a 64-bit system, of course. I made a mistake, I am sorry.grub-installexpects a device, so assuming you only have one harddrive, the command would besudo grub-install --uefi-secure-boot /dev/sda.
– octavian
Feb 17 '15 at 17:01
Unfortunately this did not work either. I was only able to boot Windows in UEFI mode.
– Alessandro Power
Feb 17 '15 at 19:35
Unfortunately I received an error after running
sudo grub-install --uefi-secure-boot --force: grub-install: error: install device is not specified.– Alessandro Power
Feb 17 '15 at 16:22
Unfortunately I received an error after running
sudo grub-install --uefi-secure-boot --force: grub-install: error: install device is not specified.– Alessandro Power
Feb 17 '15 at 16:22
For the package installation, did you want me to just run
sudo apt-get install linux-signed-generic and sudo apt-get install grub-efi-amd64-signed shim-signed?– Alessandro Power
Feb 17 '15 at 16:23
For the package installation, did you want me to just run
sudo apt-get install linux-signed-generic and sudo apt-get install grub-efi-amd64-signed shim-signed?– Alessandro Power
Feb 17 '15 at 16:23
Yes,
sudo apt-get install linux-signed-generic grub-efi-amd64 shim-signed is correct, as long as you have a 64-bit system, of course. I made a mistake, I am sorry. grub-install expects a device, so assuming you only have one harddrive, the command would be sudo grub-install --uefi-secure-boot /dev/sda.– octavian
Feb 17 '15 at 17:01
Yes,
sudo apt-get install linux-signed-generic grub-efi-amd64 shim-signed is correct, as long as you have a 64-bit system, of course. I made a mistake, I am sorry. grub-install expects a device, so assuming you only have one harddrive, the command would be sudo grub-install --uefi-secure-boot /dev/sda.– octavian
Feb 17 '15 at 17:01
Unfortunately this did not work either. I was only able to boot Windows in UEFI mode.
– Alessandro Power
Feb 17 '15 at 19:35
Unfortunately this did not work either. I was only able to boot Windows in UEFI mode.
– Alessandro Power
Feb 17 '15 at 19:35
add a comment |
up vote
0
down vote
I had a lot of problems when I installed Ubuntu on my lap(the UEFI mode was on). Someone told me to uninstall Ubuntu and reinstall it after disabling UEFI. Needless to say that sure did work. You said you installed it before one month, I believe the problem didn't came to exist just now. If there is still time for reinstall try that one too.
answered Feb 19 '15 at 12:45
theDistantStar
183129
I may try this in the future, but I do not have any immediate plans to reinstall ubuntu.
– Alessandro Power
Feb 19 '15 at 21:32
add a comment |
up vote
0
down vote
I had a lot of problems when I installed Ubuntu on my lap(the UEFI mode was on). Someone told me to uninstall Ubuntu and reinstall it after disabling UEFI. Needless to say that sure did work. You said you installed it before one month, I believe the problem didn't came to exist just now. If there is still time for reinstall try that one too.
answered Feb 19 '15 at 12:45
theDistantStar
183129
I may try this in the future, but I do not have any immediate plans to reinstall ubuntu.
– Alessandro Power
Feb 19 '15 at 21:32
add a comment |
up vote
0
down vote
up vote
0
down vote
I had a lot of problems when I installed Ubuntu on my lap(the UEFI mode was on). Someone told me to uninstall Ubuntu and reinstall it after disabling UEFI. Needless to say that sure did work. You said you installed it before one month, I believe the problem didn't came to exist just now. If there is still time for reinstall try that one too.
answered Feb 19 '15 at 12:45
theDistantStar
183129
I had a lot of problems when I installed Ubuntu on my lap(the UEFI mode was on). Someone told me to uninstall Ubuntu and reinstall it after disabling UEFI. Needless to say that sure did work. You said you installed it before one month, I believe the problem didn't came to exist just now. If there is still time for reinstall try that one too.
answered Feb 19 '15 at 12:45
theDistantStar
183129
answered Feb 19 '15 at 12:45
theDistantStar
183129
answered Feb 19 '15 at 12:45
theDistantStar
183129
answered Feb 19 '15 at 12:45
theDistantStar
183129
183129
I may try this in the future, but I do not have any immediate plans to reinstall ubuntu.
– Alessandro Power
Feb 19 '15 at 21:32
add a comment |
I may try this in the future, but I do not have any immediate plans to reinstall ubuntu.
– Alessandro Power
Feb 19 '15 at 21:32
I may try this in the future, but I do not have any immediate plans to reinstall ubuntu.
– Alessandro Power
Feb 19 '15 at 21:32
I may try this in the future, but I do not have any immediate plans to reinstall ubuntu.
– Alessandro Power
Feb 19 '15 at 21:32
add a comment |
up vote
0
down vote
I dont know if this will help but have you tryed using the disk to repair grub?
I'm sorry if this sounds basic but this has helped me with a problem sorta similar
answered Feb 22 '15 at 15:34
popcorn9499
4410
add a comment |
up vote
0
down vote
I dont know if this will help but have you tryed using the disk to repair grub?
I'm sorry if this sounds basic but this has helped me with a problem sorta similar
answered Feb 22 '15 at 15:34
popcorn9499
4410
add a comment |
up vote
0
down vote
up vote
0
down vote
I dont know if this will help but have you tryed using the disk to repair grub?
I'm sorry if this sounds basic but this has helped me with a problem sorta similar
answered Feb 22 '15 at 15:34
popcorn9499
4410
I dont know if this will help but have you tryed using the disk to repair grub?
I'm sorry if this sounds basic but this has helped me with a problem sorta similar
answered Feb 22 '15 at 15:34
popcorn9499
4410
answered Feb 22 '15 at 15:34
popcorn9499
4410
answered Feb 22 '15 at 15:34
popcorn9499
4410
answered Feb 22 '15 at 15:34
popcorn9499
4410
4410
add a comment |
add a comment |
up vote
0
down vote
You can boot Ubuntu only in UEFI because you have installed Ubuntu in UEFI mode while Your windows installation is in Legacy (Not EFI) Mode.
To Avoid Such issues you need to Install Ubuntu in UEFI mode only if Windows is installed in UEFI mode or Ubuntu is the only operating system on your computer. If your windows is installed in Legacy mode, then you must install Ubuntu in Legacy mode.
To solve this issue you need to convert Ubuntu from UEFI mode to Legacy mode.
Please follow below instructions to do it.
1) Start Boot-Repair, click on Advanced options, go to the GRUB location tab.
2) Untick the Separate /boot/efi partition option & Click the Apply button.
3) Set up your BIOS so that it boots the HDD in Legacy mode
That's it.
answered Feb 22 '15 at 16:15
Ketan Patel
10.1k94365
1
Actually my Windows is installed in UEFI mode while ubuntu is installed in Legacy mode. How would that change your instructions?
– Alessandro Power
Feb 22 '15 at 19:41
If Ubuntu is installed in Legacy mode, then you don't have to change BIOS setting to load Grub from Legacy to UEFI.
– Ketan Patel
Feb 23 '15 at 7:14
Step 2 produces the following error:GPT detected. Please create a BIOS-Boot partition (>1MB, unformatted filesystem, bios_grub flag). This can be performed via tools such as Gparted. Then try again. Alternatively, you can retry after activating the [Separate /boot/efi partition:] option.
– Alessandro Power
Feb 23 '15 at 14:08
You need to create small partition for bios boot. Use Ubuntu 14.04 live DVD and Gparted tool to create it. Assign partition bios_grub, apply changes and repeat Step 2.
– Ketan Patel
Feb 24 '15 at 2:45
add a comment |
up vote
0
down vote
You can boot Ubuntu only in UEFI because you have installed Ubuntu in UEFI mode while Your windows installation is in Legacy (Not EFI) Mode.
To Avoid Such issues you need to Install Ubuntu in UEFI mode only if Windows is installed in UEFI mode or Ubuntu is the only operating system on your computer. If your windows is installed in Legacy mode, then you must install Ubuntu in Legacy mode.
To solve this issue you need to convert Ubuntu from UEFI mode to Legacy mode.
Please follow below instructions to do it.
1) Start Boot-Repair, click on Advanced options, go to the GRUB location tab.
2) Untick the Separate /boot/efi partition option & Click the Apply button.
3) Set up your BIOS so that it boots the HDD in Legacy mode
That's it.
answered Feb 22 '15 at 16:15
Ketan Patel
10.1k94365
1
Actually my Windows is installed in UEFI mode while ubuntu is installed in Legacy mode. How would that change your instructions?
– Alessandro Power
Feb 22 '15 at 19:41
If Ubuntu is installed in Legacy mode, then you don't have to change BIOS setting to load Grub from Legacy to UEFI.
– Ketan Patel
Feb 23 '15 at 7:14
Step 2 produces the following error:GPT detected. Please create a BIOS-Boot partition (>1MB, unformatted filesystem, bios_grub flag). This can be performed via tools such as Gparted. Then try again. Alternatively, you can retry after activating the [Separate /boot/efi partition:] option.
– Alessandro Power
Feb 23 '15 at 14:08
You need to create small partition for bios boot. Use Ubuntu 14.04 live DVD and Gparted tool to create it. Assign partition bios_grub, apply changes and repeat Step 2.
– Ketan Patel
Feb 24 '15 at 2:45
add a comment |
up vote
0
down vote
up vote
0
down vote
You can boot Ubuntu only in UEFI because you have installed Ubuntu in UEFI mode while Your windows installation is in Legacy (Not EFI) Mode.
To Avoid Such issues you need to Install Ubuntu in UEFI mode only if Windows is installed in UEFI mode or Ubuntu is the only operating system on your computer. If your windows is installed in Legacy mode, then you must install Ubuntu in Legacy mode.
To solve this issue you need to convert Ubuntu from UEFI mode to Legacy mode.
Please follow below instructions to do it.
1) Start Boot-Repair, click on Advanced options, go to the GRUB location tab.
2) Untick the Separate /boot/efi partition option & Click the Apply button.
3) Set up your BIOS so that it boots the HDD in Legacy mode
That's it.
answered Feb 22 '15 at 16:15
Ketan Patel
10.1k94365
You can boot Ubuntu only in UEFI because you have installed Ubuntu in UEFI mode while Your windows installation is in Legacy (Not EFI) Mode.
To Avoid Such issues you need to Install Ubuntu in UEFI mode only if Windows is installed in UEFI mode or Ubuntu is the only operating system on your computer. If your windows is installed in Legacy mode, then you must install Ubuntu in Legacy mode.
To solve this issue you need to convert Ubuntu from UEFI mode to Legacy mode.
Please follow below instructions to do it.
1) Start Boot-Repair, click on Advanced options, go to the GRUB location tab.
2) Untick the Separate /boot/efi partition option & Click the Apply button.
3) Set up your BIOS so that it boots the HDD in Legacy mode
That's it.
answered Feb 22 '15 at 16:15
Ketan Patel
10.1k94365
answered Feb 22 '15 at 16:15
Ketan Patel
10.1k94365
answered Feb 22 '15 at 16:15
Ketan Patel
10.1k94365
answered Feb 22 '15 at 16:15
Ketan Patel
10.1k94365
10.1k94365
1
Actually my Windows is installed in UEFI mode while ubuntu is installed in Legacy mode. How would that change your instructions?
– Alessandro Power
Feb 22 '15 at 19:41
If Ubuntu is installed in Legacy mode, then you don't have to change BIOS setting to load Grub from Legacy to UEFI.
– Ketan Patel
Feb 23 '15 at 7:14
Step 2 produces the following error:GPT detected. Please create a BIOS-Boot partition (>1MB, unformatted filesystem, bios_grub flag). This can be performed via tools such as Gparted. Then try again. Alternatively, you can retry after activating the [Separate /boot/efi partition:] option.
– Alessandro Power
Feb 23 '15 at 14:08
You need to create small partition for bios boot. Use Ubuntu 14.04 live DVD and Gparted tool to create it. Assign partition bios_grub, apply changes and repeat Step 2.
– Ketan Patel
Feb 24 '15 at 2:45
add a comment |
1
Actually my Windows is installed in UEFI mode while ubuntu is installed in Legacy mode. How would that change your instructions?
– Alessandro Power
Feb 22 '15 at 19:41
If Ubuntu is installed in Legacy mode, then you don't have to change BIOS setting to load Grub from Legacy to UEFI.
– Ketan Patel
Feb 23 '15 at 7:14
Step 2 produces the following error:GPT detected. Please create a BIOS-Boot partition (>1MB, unformatted filesystem, bios_grub flag). This can be performed via tools such as Gparted. Then try again. Alternatively, you can retry after activating the [Separate /boot/efi partition:] option.
– Alessandro Power
Feb 23 '15 at 14:08
You need to create small partition for bios boot. Use Ubuntu 14.04 live DVD and Gparted tool to create it. Assign partition bios_grub, apply changes and repeat Step 2.
– Ketan Patel
Feb 24 '15 at 2:45
1
1
Actually my Windows is installed in UEFI mode while ubuntu is installed in Legacy mode. How would that change your instructions?
– Alessandro Power
Feb 22 '15 at 19:41
Actually my Windows is installed in UEFI mode while ubuntu is installed in Legacy mode. How would that change your instructions?
– Alessandro Power
Feb 22 '15 at 19:41
If Ubuntu is installed in Legacy mode, then you don't have to change BIOS setting to load Grub from Legacy to UEFI.
– Ketan Patel
Feb 23 '15 at 7:14
If Ubuntu is installed in Legacy mode, then you don't have to change BIOS setting to load Grub from Legacy to UEFI.
– Ketan Patel
Feb 23 '15 at 7:14
Step 2 produces the following error:
GPT detected. Please create a BIOS-Boot partition (>1MB, unformatted filesystem, bios_grub flag). This can be performed via tools such as Gparted. Then try again. Alternatively, you can retry after activating the [Separate /boot/efi partition:] option.– Alessandro Power
Feb 23 '15 at 14:08
Step 2 produces the following error:
GPT detected. Please create a BIOS-Boot partition (>1MB, unformatted filesystem, bios_grub flag). This can be performed via tools such as Gparted. Then try again. Alternatively, you can retry after activating the [Separate /boot/efi partition:] option.– Alessandro Power
Feb 23 '15 at 14:08
You need to create small partition for bios boot. Use Ubuntu 14.04 live DVD and Gparted tool to create it. Assign partition bios_grub, apply changes and repeat Step 2.
– Ketan Patel
Feb 24 '15 at 2:45
You need to create small partition for bios boot. Use Ubuntu 14.04 live DVD and Gparted tool to create it. Assign partition bios_grub, apply changes and repeat Step 2.
– Ketan Patel
Feb 24 '15 at 2:45
add a comment |
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I had a similar problem last month, however I also had no gui which made the problem tougher. I did get grub working using a tutorial. While I don't have that link, I do have a link that should fix your grub using a graphical tool. howtogeek.com/114884/how-to-repair-grub2-when-ubuntu-wont-boot I hope that helps
– OnethingSimple
Feb 16 '15 at 13:48
Try running
sudo grub-installandsudo update-grubif you haven't already. And could you post the output of these commands and the contents of/etc/default/grub? Also, sometime Windows CHKDSK corrupts the boot partition– texasflood
Feb 18 '15 at 20:34
sudo grub-installdoesn't work; I'm prompted to specify an install device.– Alessandro Power
Feb 19 '15 at 4:51
I read somewhere that you have to decide on either UEFI or compatible (CSM) mode before installing, as the OS will only be able to work with the configuration it had when it was installed. So if you used different settings to install your two systems, it looks bad. This does not have to be true, but I am pretty sure. It is the same for hard disks in SATA or legacy IDE mode.
– Byte Commander
Feb 20 '15 at 20:40
@AlessandroPower first update GRUB from live cd as
update-grubthen in your BIOS enable Legacy also and just when your system is booting press [esc]key and choose boot options as Ubuntu now you will see GRUB– Mudit Kapil
Feb 22 '15 at 16:34