Kubuntu 16.04 Lost Dual Monitor Capability












0















new to Kubuntu and relatively new to Linux overall.
I installed Kubuntu 16.04 on Desktop with add-on Radeon HD 5850 GPU. I'd previously used this exact hardware to run dual monitor. I plug a DVI (my main monitor) in and an HDMI that runs to a HD TV in another room. When I installed 16.04 the setup worked perfectly. All I had to do was switch Audio Configuration to change sound from one to the other. Yesterday I updated the system and suddenly, when the desktop is on the TV is black. So I tried to change the configuration with the GUI Display Configuration Utility but could not fix it. If I leave the HDMI plugged in the Display configuration shows that both are recognized, but only one screen can be seen at a time. Unplugging HDMI brings the regular monitor back, plugging the HDMI in switches the output to the TV. When I login, I can see the dual screen on both until I finish the boot, then it starts this behavior.










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  • To add a little more detail. If I plug both DVI Monitor and HDMI plugs into the GPU before booting, I can see both at the login screen. That is both are duplicated which is what I want. Then I put my password in and the OS loading bar starts to cross. As soon as it gets to about 75% loaded the DVI monitor suddenly goes black and says "No Signal" I can still see it on the TV in the other room.

    – muttony
    Jul 8 '16 at 19:55
















0















new to Kubuntu and relatively new to Linux overall.
I installed Kubuntu 16.04 on Desktop with add-on Radeon HD 5850 GPU. I'd previously used this exact hardware to run dual monitor. I plug a DVI (my main monitor) in and an HDMI that runs to a HD TV in another room. When I installed 16.04 the setup worked perfectly. All I had to do was switch Audio Configuration to change sound from one to the other. Yesterday I updated the system and suddenly, when the desktop is on the TV is black. So I tried to change the configuration with the GUI Display Configuration Utility but could not fix it. If I leave the HDMI plugged in the Display configuration shows that both are recognized, but only one screen can be seen at a time. Unplugging HDMI brings the regular monitor back, plugging the HDMI in switches the output to the TV. When I login, I can see the dual screen on both until I finish the boot, then it starts this behavior.










share|improve this question














bumped to the homepage by Community yesterday


This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
















  • To add a little more detail. If I plug both DVI Monitor and HDMI plugs into the GPU before booting, I can see both at the login screen. That is both are duplicated which is what I want. Then I put my password in and the OS loading bar starts to cross. As soon as it gets to about 75% loaded the DVI monitor suddenly goes black and says "No Signal" I can still see it on the TV in the other room.

    – muttony
    Jul 8 '16 at 19:55














0












0








0








new to Kubuntu and relatively new to Linux overall.
I installed Kubuntu 16.04 on Desktop with add-on Radeon HD 5850 GPU. I'd previously used this exact hardware to run dual monitor. I plug a DVI (my main monitor) in and an HDMI that runs to a HD TV in another room. When I installed 16.04 the setup worked perfectly. All I had to do was switch Audio Configuration to change sound from one to the other. Yesterday I updated the system and suddenly, when the desktop is on the TV is black. So I tried to change the configuration with the GUI Display Configuration Utility but could not fix it. If I leave the HDMI plugged in the Display configuration shows that both are recognized, but only one screen can be seen at a time. Unplugging HDMI brings the regular monitor back, plugging the HDMI in switches the output to the TV. When I login, I can see the dual screen on both until I finish the boot, then it starts this behavior.










share|improve this question














new to Kubuntu and relatively new to Linux overall.
I installed Kubuntu 16.04 on Desktop with add-on Radeon HD 5850 GPU. I'd previously used this exact hardware to run dual monitor. I plug a DVI (my main monitor) in and an HDMI that runs to a HD TV in another room. When I installed 16.04 the setup worked perfectly. All I had to do was switch Audio Configuration to change sound from one to the other. Yesterday I updated the system and suddenly, when the desktop is on the TV is black. So I tried to change the configuration with the GUI Display Configuration Utility but could not fix it. If I leave the HDMI plugged in the Display configuration shows that both are recognized, but only one screen can be seen at a time. Unplugging HDMI brings the regular monitor back, plugging the HDMI in switches the output to the TV. When I login, I can see the dual screen on both until I finish the boot, then it starts this behavior.







16.04 kubuntu multiple-monitors






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asked Jun 24 '16 at 14:42









muttonymuttony

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111





bumped to the homepage by Community yesterday


This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.







bumped to the homepage by Community yesterday


This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.















  • To add a little more detail. If I plug both DVI Monitor and HDMI plugs into the GPU before booting, I can see both at the login screen. That is both are duplicated which is what I want. Then I put my password in and the OS loading bar starts to cross. As soon as it gets to about 75% loaded the DVI monitor suddenly goes black and says "No Signal" I can still see it on the TV in the other room.

    – muttony
    Jul 8 '16 at 19:55



















  • To add a little more detail. If I plug both DVI Monitor and HDMI plugs into the GPU before booting, I can see both at the login screen. That is both are duplicated which is what I want. Then I put my password in and the OS loading bar starts to cross. As soon as it gets to about 75% loaded the DVI monitor suddenly goes black and says "No Signal" I can still see it on the TV in the other room.

    – muttony
    Jul 8 '16 at 19:55

















To add a little more detail. If I plug both DVI Monitor and HDMI plugs into the GPU before booting, I can see both at the login screen. That is both are duplicated which is what I want. Then I put my password in and the OS loading bar starts to cross. As soon as it gets to about 75% loaded the DVI monitor suddenly goes black and says "No Signal" I can still see it on the TV in the other room.

– muttony
Jul 8 '16 at 19:55





To add a little more detail. If I plug both DVI Monitor and HDMI plugs into the GPU before booting, I can see both at the login screen. That is both are duplicated which is what I want. Then I put my password in and the OS loading bar starts to cross. As soon as it gets to about 75% loaded the DVI monitor suddenly goes black and says "No Signal" I can still see it on the TV in the other room.

– muttony
Jul 8 '16 at 19:55










1 Answer
1






active

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0














I have a similar setup, different gpu version and using VGA and DVI. I am facing the same problem from the most recent update. I previously had both monitors working with the 4.4.0.22 kernel.



During startup see if there is a new kernel installed and try booting into an older one.



How to change kernel at boot



edit: also try this Dell 3543 Kubuntu 16.04 can't get output to 2nd monitor on HDMI i haven't had a chance to give this solution a go






share|improve this answer


























  • Changing the Kernel back had no effect.

    – muttony
    Jul 8 '16 at 19:31











  • the fix on the Dell 3543 thread didn't work either.

    – muttony
    Jul 8 '16 at 19:52











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1 Answer
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1 Answer
1






active

oldest

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active

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0














I have a similar setup, different gpu version and using VGA and DVI. I am facing the same problem from the most recent update. I previously had both monitors working with the 4.4.0.22 kernel.



During startup see if there is a new kernel installed and try booting into an older one.



How to change kernel at boot



edit: also try this Dell 3543 Kubuntu 16.04 can't get output to 2nd monitor on HDMI i haven't had a chance to give this solution a go






share|improve this answer


























  • Changing the Kernel back had no effect.

    – muttony
    Jul 8 '16 at 19:31











  • the fix on the Dell 3543 thread didn't work either.

    – muttony
    Jul 8 '16 at 19:52
















0














I have a similar setup, different gpu version and using VGA and DVI. I am facing the same problem from the most recent update. I previously had both monitors working with the 4.4.0.22 kernel.



During startup see if there is a new kernel installed and try booting into an older one.



How to change kernel at boot



edit: also try this Dell 3543 Kubuntu 16.04 can't get output to 2nd monitor on HDMI i haven't had a chance to give this solution a go






share|improve this answer


























  • Changing the Kernel back had no effect.

    – muttony
    Jul 8 '16 at 19:31











  • the fix on the Dell 3543 thread didn't work either.

    – muttony
    Jul 8 '16 at 19:52














0












0








0







I have a similar setup, different gpu version and using VGA and DVI. I am facing the same problem from the most recent update. I previously had both monitors working with the 4.4.0.22 kernel.



During startup see if there is a new kernel installed and try booting into an older one.



How to change kernel at boot



edit: also try this Dell 3543 Kubuntu 16.04 can't get output to 2nd monitor on HDMI i haven't had a chance to give this solution a go






share|improve this answer















I have a similar setup, different gpu version and using VGA and DVI. I am facing the same problem from the most recent update. I previously had both monitors working with the 4.4.0.22 kernel.



During startup see if there is a new kernel installed and try booting into an older one.



How to change kernel at boot



edit: also try this Dell 3543 Kubuntu 16.04 can't get output to 2nd monitor on HDMI i haven't had a chance to give this solution a go







share|improve this answer














share|improve this answer



share|improve this answer








edited Jun 24 '16 at 20:52

























answered Jun 24 '16 at 20:37









Patrick LPatrick L

11




11













  • Changing the Kernel back had no effect.

    – muttony
    Jul 8 '16 at 19:31











  • the fix on the Dell 3543 thread didn't work either.

    – muttony
    Jul 8 '16 at 19:52



















  • Changing the Kernel back had no effect.

    – muttony
    Jul 8 '16 at 19:31











  • the fix on the Dell 3543 thread didn't work either.

    – muttony
    Jul 8 '16 at 19:52

















Changing the Kernel back had no effect.

– muttony
Jul 8 '16 at 19:31





Changing the Kernel back had no effect.

– muttony
Jul 8 '16 at 19:31













the fix on the Dell 3543 thread didn't work either.

– muttony
Jul 8 '16 at 19:52





the fix on the Dell 3543 thread didn't work either.

– muttony
Jul 8 '16 at 19:52


















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