Can't boot into Ubuntu in Windows 10 / Ubuntu dual boot
up vote
5
down vote
favorite
I installed Ubuntu on a Dell XPS 13 laptop that had Windows 10 preinstalled on it. I installed it from a USB flash drive on a partition.
When I boot my computer I can only boot into Windows 10 and Ubuntu is nowhere to be seen.
If I boot into my USB then I can see that Ubuntu is installed, but I can't get to it from the BIOS boot menu.
boot dual-boot grub2 windows-10
edited Dec 4 at 4:27
karel
55.7k11124141
asked Dec 10 '15 at 18:13
Haim
138114
add a comment |
up vote
5
down vote
favorite
I installed Ubuntu on a Dell XPS 13 laptop that had Windows 10 preinstalled on it. I installed it from a USB flash drive on a partition.
When I boot my computer I can only boot into Windows 10 and Ubuntu is nowhere to be seen.
If I boot into my USB then I can see that Ubuntu is installed, but I can't get to it from the BIOS boot menu.
boot dual-boot grub2 windows-10
edited Dec 4 at 4:27
karel
55.7k11124141
asked Dec 10 '15 at 18:13
Haim
138114
This might help you out with your problem.
– Alex Lowe
Dec 10 '15 at 18:21
it doesn't :( i'm not seeing UBUNTU in the boot menu
– Haim
Dec 10 '15 at 18:34
add a comment |
up vote
5
down vote
favorite
up vote
5
down vote
favorite
I installed Ubuntu on a Dell XPS 13 laptop that had Windows 10 preinstalled on it. I installed it from a USB flash drive on a partition.
When I boot my computer I can only boot into Windows 10 and Ubuntu is nowhere to be seen.
If I boot into my USB then I can see that Ubuntu is installed, but I can't get to it from the BIOS boot menu.
boot dual-boot grub2 windows-10
edited Dec 4 at 4:27
karel
55.7k11124141
asked Dec 10 '15 at 18:13
Haim
138114
I installed Ubuntu on a Dell XPS 13 laptop that had Windows 10 preinstalled on it. I installed it from a USB flash drive on a partition.
When I boot my computer I can only boot into Windows 10 and Ubuntu is nowhere to be seen.
If I boot into my USB then I can see that Ubuntu is installed, but I can't get to it from the BIOS boot menu.
boot dual-boot grub2 windows-10
boot dual-boot grub2 windows-10
edited Dec 4 at 4:27
karel
55.7k11124141
asked Dec 10 '15 at 18:13
Haim
138114
edited Dec 4 at 4:27
karel
55.7k11124141
asked Dec 10 '15 at 18:13
Haim
138114
edited Dec 4 at 4:27
karel
55.7k11124141
edited Dec 4 at 4:27
karel
55.7k11124141
edited Dec 4 at 4:27
karel
55.7k11124141
55.7k11124141
asked Dec 10 '15 at 18:13
Haim
138114
asked Dec 10 '15 at 18:13
Haim
138114
asked Dec 10 '15 at 18:13
Haim
138114
138114
This might help you out with your problem.
– Alex Lowe
Dec 10 '15 at 18:21
it doesn't :( i'm not seeing UBUNTU in the boot menu
– Haim
Dec 10 '15 at 18:34
add a comment |
This might help you out with your problem.
– Alex Lowe
Dec 10 '15 at 18:21
it doesn't :( i'm not seeing UBUNTU in the boot menu
– Haim
Dec 10 '15 at 18:34
This might help you out with your problem.
– Alex Lowe
Dec 10 '15 at 18:21
This might help you out with your problem.
– Alex Lowe
Dec 10 '15 at 18:21
it doesn't :( i'm not seeing UBUNTU in the boot menu
– Haim
Dec 10 '15 at 18:34
it doesn't :( i'm not seeing UBUNTU in the boot menu
– Haim
Dec 10 '15 at 18:34
add a comment |
4 Answers
4
active
oldest
votes
up vote
3
down vote
accepted
Disable the hibernation mode and Fast Boot in Windows.
Open command prompt as administrator and execute :
powercfg /h off
Open the legacy version of the Windows Control Panel (not the modern version).
Select Energy Settings, enable show hidden settings and uncheck Fast Boot.
After having done this - shutdown the computer completely - do NOT reboot.
Boot into the BIOS and select Ubuntu as the default operating system to boot.
Update :
In case there is no Ubuntu entry to be found in the BIOS / UEFI settings,
re-install the GRUB boot loader to your Ubuntu installation in EFI mode.
Boot from the Ubuntu installation media - open a terminal and execute:
sudo mount /dev/sdXXX /mnt
sudo mount /dev/sdXX /mnt/boot/efi
for i in /dev /dev/pts /proc /sys /run; do sudo mount -B $i /mnt$i; done
sudo chroot /mnt
grub-install /dev/sdX
update-grub
Note:
sdX = disk | sdXX = efi partition | sdXXX = system partition
To identify the partition numbers use GParted - it is included in the Ubuntu installation media.
Boot into BIOS and select Ubuntu in UEFI settings to be the default operating system to boot.
answered Dec 10 '15 at 18:23
cl-netbox
25.7k572113
Thanks! I can't see Energy Settings in the control panel?
– Haim
Dec 10 '15 at 18:33
@Haim : It is there ... something with energy ... search through the old version of control panel ... maybe fast boot is already disabled after you executed the command. :)
– cl-netbox
Dec 10 '15 at 18:35
1
Ok, I restarted and still the boot menu doesn't show UBUNTU
– Haim
Dec 10 '15 at 18:39
@Haim : Did you switch the default operating system to Ubuntu in BIOS / UEFI settings ? :)
– cl-netbox
Dec 10 '15 at 18:41
where would I do that? BTW thanks for trying to help me out
– Haim
Dec 10 '15 at 20:21
|
show 2 more comments
up vote
1
down vote
I had the exact same problem. What fixed it for me was this:
I have 2 different hard drives installed. It took me forever to figure this out but was solved it was changing the boot priority from the first to the second drive. Probably the boot manager for ubuntu was installed on the other drive so it couldn't find it and booted straight into windows.
answered Nov 11 at 7:53
Patrick Lemke
112
add a comment |
up vote
0
down vote
Shutdown. Then press F12 on boot and use arrows to choose ubuntu (note lowercase).
Also, you should try shutting down, press F2 to open BIOS/UEFI settings and disable Secure Boot and make ubuntu top priority. Then GRUB can boot Windows.
edited Dec 14 '15 at 15:20
hg8
9,539125388
answered Dec 10 '15 at 18:26
juniorRubyist
15811
3
The problem us that UBUNTU doesn't show in the list of boot options
– Haim
Dec 10 '15 at 18:33
1
I had the same problem, because UEFI was pulling up the Windows 10 bootloader not GRUB.
– Rick Chatham
Mar 24 '16 at 3:29
add a comment |
up vote
0
down vote
Immediately after the BIOS/UEFI splash screen during boot, with BIOS, quickly press and hold the Shift key, which will bring up a GNU GRUB menu screen. With UEFI press (perhaps several times) the Esc key to get to the GNU GRUB menu screen. Select Ubuntu from the GRUB menu and press Enter.
From Ubuntu open the terminal and type:
sudo update-grub && sudo reboot
If this doesn't work try repairing the GRUB bootloader with Boot Repair. Open the terminal and type:
sudo add-apt-repository ppa:yannubuntu/boot-repair
sudo apt update
sudo apt install -y boot-repair
sudo boot-repair
Open the Boot Repair application and select Advanced Options -> Main Options tab -> check Reinstall GRUB and Unhide boot menu as shown in the below screenshot. Click the Apply button. Then reboot the computer with sudo reboot
If the OSs were installed in different modes, dual booting Windows and Ubuntu can't work.
BIOS vs. UEFI
If you have installed Ubuntu in legacy mode on the same drive with GPT partitioning, you can use Boot Repair's Advanced options to uninstall grub-pc and install grub-efi-amd64. That converts the Ubuntu installation from BIOS boot to UEFI boot, the same firmware as most recently manufactured laptops with Windows pre-installed have.
Converting Ubuntu into UEFI mode
- Start Boot-Repair, and select Advanced options -> GRUB location tab.
- If you do not see a Separate /boot/efi partition option, this means that your PC does not have any UEFI partition.
If you see a Separate /boot/efi partition option, put a checkmark in the checkbox to the left of it, then click the Apply button in the lower right corner.
Set up your BIOS so that it boots the hard drive in UEFI mode. The way to adjust this setting depends on the specific model of the computer, but generally this setting is located in the boot priority settings under the Boot tab of the BIOS/UEFI setup utility.
For more information about converting Ubuntu into UEFI mode review https://help.ubuntu.com/community/UEFI in the section about Converting Ubuntu into UEFI mode.
The grub bootloader can also be converted in the opposite direction from UEFI to BIOS. Linux can boot fine from a GPT disk in BIOS mode. See this answer: Convert from EFI to BIOS boot
answered Dec 4 at 4:11
karel
55.7k11124141
add a comment |
4 Answers
4
active
oldest
votes
4 Answers
4
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
3
down vote
accepted
Disable the hibernation mode and Fast Boot in Windows.
Open command prompt as administrator and execute :
powercfg /h off
Open the legacy version of the Windows Control Panel (not the modern version).
Select Energy Settings, enable show hidden settings and uncheck Fast Boot.
After having done this - shutdown the computer completely - do NOT reboot.
Boot into the BIOS and select Ubuntu as the default operating system to boot.
Update :
In case there is no Ubuntu entry to be found in the BIOS / UEFI settings,
re-install the GRUB boot loader to your Ubuntu installation in EFI mode.
Boot from the Ubuntu installation media - open a terminal and execute:
sudo mount /dev/sdXXX /mnt
sudo mount /dev/sdXX /mnt/boot/efi
for i in /dev /dev/pts /proc /sys /run; do sudo mount -B $i /mnt$i; done
sudo chroot /mnt
grub-install /dev/sdX
update-grub
Note:
sdX = disk | sdXX = efi partition | sdXXX = system partition
To identify the partition numbers use GParted - it is included in the Ubuntu installation media.
Boot into BIOS and select Ubuntu in UEFI settings to be the default operating system to boot.
answered Dec 10 '15 at 18:23
cl-netbox
25.7k572113
Thanks! I can't see Energy Settings in the control panel?
– Haim
Dec 10 '15 at 18:33
@Haim : It is there ... something with energy ... search through the old version of control panel ... maybe fast boot is already disabled after you executed the command. :)
– cl-netbox
Dec 10 '15 at 18:35
1
Ok, I restarted and still the boot menu doesn't show UBUNTU
– Haim
Dec 10 '15 at 18:39
@Haim : Did you switch the default operating system to Ubuntu in BIOS / UEFI settings ? :)
– cl-netbox
Dec 10 '15 at 18:41
where would I do that? BTW thanks for trying to help me out
– Haim
Dec 10 '15 at 20:21
|
show 2 more comments
up vote
3
down vote
accepted
Disable the hibernation mode and Fast Boot in Windows.
Open command prompt as administrator and execute :
powercfg /h off
Open the legacy version of the Windows Control Panel (not the modern version).
Select Energy Settings, enable show hidden settings and uncheck Fast Boot.
After having done this - shutdown the computer completely - do NOT reboot.
Boot into the BIOS and select Ubuntu as the default operating system to boot.
Update :
In case there is no Ubuntu entry to be found in the BIOS / UEFI settings,
re-install the GRUB boot loader to your Ubuntu installation in EFI mode.
Boot from the Ubuntu installation media - open a terminal and execute:
sudo mount /dev/sdXXX /mnt
sudo mount /dev/sdXX /mnt/boot/efi
for i in /dev /dev/pts /proc /sys /run; do sudo mount -B $i /mnt$i; done
sudo chroot /mnt
grub-install /dev/sdX
update-grub
Note:
sdX = disk | sdXX = efi partition | sdXXX = system partition
To identify the partition numbers use GParted - it is included in the Ubuntu installation media.
Boot into BIOS and select Ubuntu in UEFI settings to be the default operating system to boot.
answered Dec 10 '15 at 18:23
cl-netbox
25.7k572113
Thanks! I can't see Energy Settings in the control panel?
– Haim
Dec 10 '15 at 18:33
@Haim : It is there ... something with energy ... search through the old version of control panel ... maybe fast boot is already disabled after you executed the command. :)
– cl-netbox
Dec 10 '15 at 18:35
1
Ok, I restarted and still the boot menu doesn't show UBUNTU
– Haim
Dec 10 '15 at 18:39
@Haim : Did you switch the default operating system to Ubuntu in BIOS / UEFI settings ? :)
– cl-netbox
Dec 10 '15 at 18:41
where would I do that? BTW thanks for trying to help me out
– Haim
Dec 10 '15 at 20:21
|
show 2 more comments
up vote
3
down vote
accepted
up vote
3
down vote
accepted
Disable the hibernation mode and Fast Boot in Windows.
Open command prompt as administrator and execute :
powercfg /h off
Open the legacy version of the Windows Control Panel (not the modern version).
Select Energy Settings, enable show hidden settings and uncheck Fast Boot.
After having done this - shutdown the computer completely - do NOT reboot.
Boot into the BIOS and select Ubuntu as the default operating system to boot.
Update :
In case there is no Ubuntu entry to be found in the BIOS / UEFI settings,
re-install the GRUB boot loader to your Ubuntu installation in EFI mode.
Boot from the Ubuntu installation media - open a terminal and execute:
sudo mount /dev/sdXXX /mnt
sudo mount /dev/sdXX /mnt/boot/efi
for i in /dev /dev/pts /proc /sys /run; do sudo mount -B $i /mnt$i; done
sudo chroot /mnt
grub-install /dev/sdX
update-grub
Note:
sdX = disk | sdXX = efi partition | sdXXX = system partition
To identify the partition numbers use GParted - it is included in the Ubuntu installation media.
Boot into BIOS and select Ubuntu in UEFI settings to be the default operating system to boot.
answered Dec 10 '15 at 18:23
cl-netbox
25.7k572113
Disable the hibernation mode and Fast Boot in Windows.
Open command prompt as administrator and execute :
powercfg /h off
Open the legacy version of the Windows Control Panel (not the modern version).
Select Energy Settings, enable show hidden settings and uncheck Fast Boot.
After having done this - shutdown the computer completely - do NOT reboot.
Boot into the BIOS and select Ubuntu as the default operating system to boot.
Update :
In case there is no Ubuntu entry to be found in the BIOS / UEFI settings,
re-install the GRUB boot loader to your Ubuntu installation in EFI mode.
Boot from the Ubuntu installation media - open a terminal and execute:
sudo mount /dev/sdXXX /mnt
sudo mount /dev/sdXX /mnt/boot/efi
for i in /dev /dev/pts /proc /sys /run; do sudo mount -B $i /mnt$i; done
sudo chroot /mnt
grub-install /dev/sdX
update-grub
Note:
sdX = disk | sdXX = efi partition | sdXXX = system partition
To identify the partition numbers use GParted - it is included in the Ubuntu installation media.
Boot into BIOS and select Ubuntu in UEFI settings to be the default operating system to boot.
answered Dec 10 '15 at 18:23
cl-netbox
25.7k572113
edited Apr 12 '17 at 9:46
answered Dec 10 '15 at 18:23
cl-netbox
25.7k572113
answered Dec 10 '15 at 18:23
cl-netbox
25.7k572113
answered Dec 10 '15 at 18:23
cl-netbox
25.7k572113
25.7k572113
Thanks! I can't see Energy Settings in the control panel?
– Haim
Dec 10 '15 at 18:33
@Haim : It is there ... something with energy ... search through the old version of control panel ... maybe fast boot is already disabled after you executed the command. :)
– cl-netbox
Dec 10 '15 at 18:35
1
Ok, I restarted and still the boot menu doesn't show UBUNTU
– Haim
Dec 10 '15 at 18:39
@Haim : Did you switch the default operating system to Ubuntu in BIOS / UEFI settings ? :)
– cl-netbox
Dec 10 '15 at 18:41
where would I do that? BTW thanks for trying to help me out
– Haim
Dec 10 '15 at 20:21
|
show 2 more comments
Thanks! I can't see Energy Settings in the control panel?
– Haim
Dec 10 '15 at 18:33
@Haim : It is there ... something with energy ... search through the old version of control panel ... maybe fast boot is already disabled after you executed the command. :)
– cl-netbox
Dec 10 '15 at 18:35
1
Ok, I restarted and still the boot menu doesn't show UBUNTU
– Haim
Dec 10 '15 at 18:39
@Haim : Did you switch the default operating system to Ubuntu in BIOS / UEFI settings ? :)
– cl-netbox
Dec 10 '15 at 18:41
where would I do that? BTW thanks for trying to help me out
– Haim
Dec 10 '15 at 20:21
Thanks! I can't see Energy Settings in the control panel?
– Haim
Dec 10 '15 at 18:33
Thanks! I can't see Energy Settings in the control panel?
– Haim
Dec 10 '15 at 18:33
@Haim : It is there ... something with energy ... search through the old version of control panel ... maybe fast boot is already disabled after you executed the command. :)
– cl-netbox
Dec 10 '15 at 18:35
@Haim : It is there ... something with energy ... search through the old version of control panel ... maybe fast boot is already disabled after you executed the command. :)
– cl-netbox
Dec 10 '15 at 18:35
1
1
Ok, I restarted and still the boot menu doesn't show UBUNTU
– Haim
Dec 10 '15 at 18:39
Ok, I restarted and still the boot menu doesn't show UBUNTU
– Haim
Dec 10 '15 at 18:39
@Haim : Did you switch the default operating system to Ubuntu in BIOS / UEFI settings ? :)
– cl-netbox
Dec 10 '15 at 18:41
@Haim : Did you switch the default operating system to Ubuntu in BIOS / UEFI settings ? :)
– cl-netbox
Dec 10 '15 at 18:41
where would I do that? BTW thanks for trying to help me out
– Haim
Dec 10 '15 at 20:21
where would I do that? BTW thanks for trying to help me out
– Haim
Dec 10 '15 at 20:21
|
show 2 more comments
up vote
1
down vote
I had the exact same problem. What fixed it for me was this:
I have 2 different hard drives installed. It took me forever to figure this out but was solved it was changing the boot priority from the first to the second drive. Probably the boot manager for ubuntu was installed on the other drive so it couldn't find it and booted straight into windows.
answered Nov 11 at 7:53
Patrick Lemke
112
add a comment |
up vote
1
down vote
I had the exact same problem. What fixed it for me was this:
I have 2 different hard drives installed. It took me forever to figure this out but was solved it was changing the boot priority from the first to the second drive. Probably the boot manager for ubuntu was installed on the other drive so it couldn't find it and booted straight into windows.
answered Nov 11 at 7:53
Patrick Lemke
112
add a comment |
up vote
1
down vote
up vote
1
down vote
I had the exact same problem. What fixed it for me was this:
I have 2 different hard drives installed. It took me forever to figure this out but was solved it was changing the boot priority from the first to the second drive. Probably the boot manager for ubuntu was installed on the other drive so it couldn't find it and booted straight into windows.
answered Nov 11 at 7:53
Patrick Lemke
112
I had the exact same problem. What fixed it for me was this:
I have 2 different hard drives installed. It took me forever to figure this out but was solved it was changing the boot priority from the first to the second drive. Probably the boot manager for ubuntu was installed on the other drive so it couldn't find it and booted straight into windows.
answered Nov 11 at 7:53
Patrick Lemke
112
answered Nov 11 at 7:53
Patrick Lemke
112
answered Nov 11 at 7:53
Patrick Lemke
112
answered Nov 11 at 7:53
Patrick Lemke
112
112
add a comment |
add a comment |
up vote
0
down vote
Shutdown. Then press F12 on boot and use arrows to choose ubuntu (note lowercase).
Also, you should try shutting down, press F2 to open BIOS/UEFI settings and disable Secure Boot and make ubuntu top priority. Then GRUB can boot Windows.
edited Dec 14 '15 at 15:20
hg8
9,539125388
answered Dec 10 '15 at 18:26
juniorRubyist
15811
3
The problem us that UBUNTU doesn't show in the list of boot options
– Haim
Dec 10 '15 at 18:33
1
I had the same problem, because UEFI was pulling up the Windows 10 bootloader not GRUB.
– Rick Chatham
Mar 24 '16 at 3:29
add a comment |
up vote
0
down vote
Shutdown. Then press F12 on boot and use arrows to choose ubuntu (note lowercase).
Also, you should try shutting down, press F2 to open BIOS/UEFI settings and disable Secure Boot and make ubuntu top priority. Then GRUB can boot Windows.
edited Dec 14 '15 at 15:20
hg8
9,539125388
answered Dec 10 '15 at 18:26
juniorRubyist
15811
3
The problem us that UBUNTU doesn't show in the list of boot options
– Haim
Dec 10 '15 at 18:33
1
I had the same problem, because UEFI was pulling up the Windows 10 bootloader not GRUB.
– Rick Chatham
Mar 24 '16 at 3:29
add a comment |
up vote
0
down vote
up vote
0
down vote
Shutdown. Then press F12 on boot and use arrows to choose ubuntu (note lowercase).
Also, you should try shutting down, press F2 to open BIOS/UEFI settings and disable Secure Boot and make ubuntu top priority. Then GRUB can boot Windows.
edited Dec 14 '15 at 15:20
hg8
9,539125388
answered Dec 10 '15 at 18:26
juniorRubyist
15811
Shutdown. Then press F12 on boot and use arrows to choose ubuntu (note lowercase).
Also, you should try shutting down, press F2 to open BIOS/UEFI settings and disable Secure Boot and make ubuntu top priority. Then GRUB can boot Windows.
edited Dec 14 '15 at 15:20
hg8
9,539125388
answered Dec 10 '15 at 18:26
juniorRubyist
15811
edited Dec 14 '15 at 15:20
hg8
9,539125388
edited Dec 14 '15 at 15:20
hg8
9,539125388
edited Dec 14 '15 at 15:20
hg8
9,539125388
9,539125388
answered Dec 10 '15 at 18:26
juniorRubyist
15811
answered Dec 10 '15 at 18:26
juniorRubyist
15811
answered Dec 10 '15 at 18:26
juniorRubyist
15811
15811
3
The problem us that UBUNTU doesn't show in the list of boot options
– Haim
Dec 10 '15 at 18:33
1
I had the same problem, because UEFI was pulling up the Windows 10 bootloader not GRUB.
– Rick Chatham
Mar 24 '16 at 3:29
add a comment |
3
The problem us that UBUNTU doesn't show in the list of boot options
– Haim
Dec 10 '15 at 18:33
1
I had the same problem, because UEFI was pulling up the Windows 10 bootloader not GRUB.
– Rick Chatham
Mar 24 '16 at 3:29
3
3
The problem us that UBUNTU doesn't show in the list of boot options
– Haim
Dec 10 '15 at 18:33
The problem us that UBUNTU doesn't show in the list of boot options
– Haim
Dec 10 '15 at 18:33
1
1
I had the same problem, because UEFI was pulling up the Windows 10 bootloader not GRUB.
– Rick Chatham
Mar 24 '16 at 3:29
I had the same problem, because UEFI was pulling up the Windows 10 bootloader not GRUB.
– Rick Chatham
Mar 24 '16 at 3:29
add a comment |
up vote
0
down vote
Immediately after the BIOS/UEFI splash screen during boot, with BIOS, quickly press and hold the Shift key, which will bring up a GNU GRUB menu screen. With UEFI press (perhaps several times) the Esc key to get to the GNU GRUB menu screen. Select Ubuntu from the GRUB menu and press Enter.
From Ubuntu open the terminal and type:
sudo update-grub && sudo reboot
If this doesn't work try repairing the GRUB bootloader with Boot Repair. Open the terminal and type:
sudo add-apt-repository ppa:yannubuntu/boot-repair
sudo apt update
sudo apt install -y boot-repair
sudo boot-repair
Open the Boot Repair application and select Advanced Options -> Main Options tab -> check Reinstall GRUB and Unhide boot menu as shown in the below screenshot. Click the Apply button. Then reboot the computer with sudo reboot
If the OSs were installed in different modes, dual booting Windows and Ubuntu can't work.
BIOS vs. UEFI
If you have installed Ubuntu in legacy mode on the same drive with GPT partitioning, you can use Boot Repair's Advanced options to uninstall grub-pc and install grub-efi-amd64. That converts the Ubuntu installation from BIOS boot to UEFI boot, the same firmware as most recently manufactured laptops with Windows pre-installed have.
Converting Ubuntu into UEFI mode
- Start Boot-Repair, and select Advanced options -> GRUB location tab.
- If you do not see a Separate /boot/efi partition option, this means that your PC does not have any UEFI partition.
If you see a Separate /boot/efi partition option, put a checkmark in the checkbox to the left of it, then click the Apply button in the lower right corner.
Set up your BIOS so that it boots the hard drive in UEFI mode. The way to adjust this setting depends on the specific model of the computer, but generally this setting is located in the boot priority settings under the Boot tab of the BIOS/UEFI setup utility.
For more information about converting Ubuntu into UEFI mode review https://help.ubuntu.com/community/UEFI in the section about Converting Ubuntu into UEFI mode.
The grub bootloader can also be converted in the opposite direction from UEFI to BIOS. Linux can boot fine from a GPT disk in BIOS mode. See this answer: Convert from EFI to BIOS boot
answered Dec 4 at 4:11
karel
55.7k11124141
add a comment |
up vote
0
down vote
Immediately after the BIOS/UEFI splash screen during boot, with BIOS, quickly press and hold the Shift key, which will bring up a GNU GRUB menu screen. With UEFI press (perhaps several times) the Esc key to get to the GNU GRUB menu screen. Select Ubuntu from the GRUB menu and press Enter.
From Ubuntu open the terminal and type:
sudo update-grub && sudo reboot
If this doesn't work try repairing the GRUB bootloader with Boot Repair. Open the terminal and type:
sudo add-apt-repository ppa:yannubuntu/boot-repair
sudo apt update
sudo apt install -y boot-repair
sudo boot-repair
Open the Boot Repair application and select Advanced Options -> Main Options tab -> check Reinstall GRUB and Unhide boot menu as shown in the below screenshot. Click the Apply button. Then reboot the computer with sudo reboot
If the OSs were installed in different modes, dual booting Windows and Ubuntu can't work.
BIOS vs. UEFI
If you have installed Ubuntu in legacy mode on the same drive with GPT partitioning, you can use Boot Repair's Advanced options to uninstall grub-pc and install grub-efi-amd64. That converts the Ubuntu installation from BIOS boot to UEFI boot, the same firmware as most recently manufactured laptops with Windows pre-installed have.
Converting Ubuntu into UEFI mode
- Start Boot-Repair, and select Advanced options -> GRUB location tab.
- If you do not see a Separate /boot/efi partition option, this means that your PC does not have any UEFI partition.
If you see a Separate /boot/efi partition option, put a checkmark in the checkbox to the left of it, then click the Apply button in the lower right corner.
Set up your BIOS so that it boots the hard drive in UEFI mode. The way to adjust this setting depends on the specific model of the computer, but generally this setting is located in the boot priority settings under the Boot tab of the BIOS/UEFI setup utility.
For more information about converting Ubuntu into UEFI mode review https://help.ubuntu.com/community/UEFI in the section about Converting Ubuntu into UEFI mode.
The grub bootloader can also be converted in the opposite direction from UEFI to BIOS. Linux can boot fine from a GPT disk in BIOS mode. See this answer: Convert from EFI to BIOS boot
answered Dec 4 at 4:11
karel
55.7k11124141
add a comment |
up vote
0
down vote
up vote
0
down vote
Immediately after the BIOS/UEFI splash screen during boot, with BIOS, quickly press and hold the Shift key, which will bring up a GNU GRUB menu screen. With UEFI press (perhaps several times) the Esc key to get to the GNU GRUB menu screen. Select Ubuntu from the GRUB menu and press Enter.
From Ubuntu open the terminal and type:
sudo update-grub && sudo reboot
If this doesn't work try repairing the GRUB bootloader with Boot Repair. Open the terminal and type:
sudo add-apt-repository ppa:yannubuntu/boot-repair
sudo apt update
sudo apt install -y boot-repair
sudo boot-repair
Open the Boot Repair application and select Advanced Options -> Main Options tab -> check Reinstall GRUB and Unhide boot menu as shown in the below screenshot. Click the Apply button. Then reboot the computer with sudo reboot
If the OSs were installed in different modes, dual booting Windows and Ubuntu can't work.
BIOS vs. UEFI
If you have installed Ubuntu in legacy mode on the same drive with GPT partitioning, you can use Boot Repair's Advanced options to uninstall grub-pc and install grub-efi-amd64. That converts the Ubuntu installation from BIOS boot to UEFI boot, the same firmware as most recently manufactured laptops with Windows pre-installed have.
Converting Ubuntu into UEFI mode
- Start Boot-Repair, and select Advanced options -> GRUB location tab.
- If you do not see a Separate /boot/efi partition option, this means that your PC does not have any UEFI partition.
If you see a Separate /boot/efi partition option, put a checkmark in the checkbox to the left of it, then click the Apply button in the lower right corner.
Set up your BIOS so that it boots the hard drive in UEFI mode. The way to adjust this setting depends on the specific model of the computer, but generally this setting is located in the boot priority settings under the Boot tab of the BIOS/UEFI setup utility.
For more information about converting Ubuntu into UEFI mode review https://help.ubuntu.com/community/UEFI in the section about Converting Ubuntu into UEFI mode.
The grub bootloader can also be converted in the opposite direction from UEFI to BIOS. Linux can boot fine from a GPT disk in BIOS mode. See this answer: Convert from EFI to BIOS boot
answered Dec 4 at 4:11
karel
55.7k11124141
Immediately after the BIOS/UEFI splash screen during boot, with BIOS, quickly press and hold the Shift key, which will bring up a GNU GRUB menu screen. With UEFI press (perhaps several times) the Esc key to get to the GNU GRUB menu screen. Select Ubuntu from the GRUB menu and press Enter.
From Ubuntu open the terminal and type:
sudo update-grub && sudo reboot
If this doesn't work try repairing the GRUB bootloader with Boot Repair. Open the terminal and type:
sudo add-apt-repository ppa:yannubuntu/boot-repair
sudo apt update
sudo apt install -y boot-repair
sudo boot-repair
Open the Boot Repair application and select Advanced Options -> Main Options tab -> check Reinstall GRUB and Unhide boot menu as shown in the below screenshot. Click the Apply button. Then reboot the computer with sudo reboot
If the OSs were installed in different modes, dual booting Windows and Ubuntu can't work.
BIOS vs. UEFI
If you have installed Ubuntu in legacy mode on the same drive with GPT partitioning, you can use Boot Repair's Advanced options to uninstall grub-pc and install grub-efi-amd64. That converts the Ubuntu installation from BIOS boot to UEFI boot, the same firmware as most recently manufactured laptops with Windows pre-installed have.
Converting Ubuntu into UEFI mode
- Start Boot-Repair, and select Advanced options -> GRUB location tab.
- If you do not see a Separate /boot/efi partition option, this means that your PC does not have any UEFI partition.
If you see a Separate /boot/efi partition option, put a checkmark in the checkbox to the left of it, then click the Apply button in the lower right corner.
Set up your BIOS so that it boots the hard drive in UEFI mode. The way to adjust this setting depends on the specific model of the computer, but generally this setting is located in the boot priority settings under the Boot tab of the BIOS/UEFI setup utility.
For more information about converting Ubuntu into UEFI mode review https://help.ubuntu.com/community/UEFI in the section about Converting Ubuntu into UEFI mode.
The grub bootloader can also be converted in the opposite direction from UEFI to BIOS. Linux can boot fine from a GPT disk in BIOS mode. See this answer: Convert from EFI to BIOS boot
answered Dec 4 at 4:11
karel
55.7k11124141
edited 2 days ago
answered Dec 4 at 4:11
karel
55.7k11124141
answered Dec 4 at 4:11
karel
55.7k11124141
answered Dec 4 at 4:11
karel
55.7k11124141
55.7k11124141
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This might help you out with your problem.
– Alex Lowe
Dec 10 '15 at 18:21
it doesn't :( i'm not seeing UBUNTU in the boot menu
– Haim
Dec 10 '15 at 18:34