[Touch-packages] [Bug 1799613] Re: In kernel 4.14.59, monitor resolution is detected correctly. In kernels after that, they are not detected correctly.
I think that fixed it.
To add `amdgpu.dc=0`, you must edit your grub configuration
https://askubuntu.com/questions/1029517/amd-rx480-screen-flicker-after-
update-to-18-04#1032198
>To do this, edit the file /etc/default/grub, for example using
>sudoedit /etc/default/grub
>Find the line beginning GRUB_CMDLINE_LINUX_DEFAULT and add the text
>amdgpu.dc=0 between the double quotes (""). Leave any other parameters as they
>are. For example, you may end up with a line like this:
>GRUB_CMDLINE_LINUX_DEFAULT="quiet splash amdgpu.dc=0"
>Save the file and exit, and then run
>sudo update-grub
>to write the configuration, and reboot.
After doing this, the resolution is detected correctly and appears
normal in the 4.15.0-38-generic kernel.
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https://bugs.launchpad.net/bugs/1799613
Title:
In kernel 4.14.59, monitor resolution is detected correctly. In
kernels after that, they are not detected correctly.
Status in linux package in Ubuntu:
Confirmed
Status in xorg package in Ubuntu:
New
Bug description:
dpkg --list | grep linux-image
ii linux-image-4.15.0-36-generic 4.15.0-36.39
amd64Signed kernel image generic
ii linux-image-4.15.0-38-generic 4.15.0-38.41
amd64Signed kernel image generic
ii linux-image-generic 4.15.0.38.40
amd64Generic Linux kernel image
ii linux-image-unsigned-4.14.59-041459-generic
4.14.59-041459.201807280929 amd64Linux kernel
image for version 4.14.59 on 64 bit x86 SMP
Booting from GRUB into 4.14.59 allows my two monitors to run at their native
resolution, 2560x1440. Any newer kernel does not allow my two monitors to run
at their native resolution, only allowing up to 1920x1200.
uname -a
Linux blackbox 4.14.59-041459-generic #201807280929 SMP Sat Jul 28
09:32:10 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
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[Touch-packages] [Bug 1799613] Re: In kernel 4.14.59, monitor resolution is detected correctly. In kernels after that, they are not detected correctly.
Where is that configured? -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1799613 Title: In kernel 4.14.59, monitor resolution is detected correctly. In kernels after that, they are not detected correctly. Status in linux package in Ubuntu: Confirmed Status in xorg package in Ubuntu: New Bug description: dpkg --list | grep linux-image ii linux-image-4.15.0-36-generic 4.15.0-36.39 amd64Signed kernel image generic ii linux-image-4.15.0-38-generic 4.15.0-38.41 amd64Signed kernel image generic ii linux-image-generic 4.15.0.38.40 amd64Generic Linux kernel image ii linux-image-unsigned-4.14.59-041459-generic 4.14.59-041459.201807280929 amd64Linux kernel image for version 4.14.59 on 64 bit x86 SMP Booting from GRUB into 4.14.59 allows my two monitors to run at their native resolution, 2560x1440. Any newer kernel does not allow my two monitors to run at their native resolution, only allowing up to 1920x1200. uname -a Linux blackbox 4.14.59-041459-generic #201807280929 SMP Sat Jul 28 09:32:10 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1799613/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
[Touch-packages] [Bug 1799613] Re: In kernel 4.14.59, monitor resolution is detected correctly. In kernels after that, they are not detected correctly.
Attached apport ** Attachment added: "apport.xorg._bwf38sg.apport" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1799613/+attachment/5205379/+files/apport.xorg._bwf38sg.apport ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1799613 Title: In kernel 4.14.59, monitor resolution is detected correctly. In kernels after that, they are not detected correctly. Status in linux package in Ubuntu: Confirmed Status in xorg package in Ubuntu: New Bug description: dpkg --list | grep linux-image ii linux-image-4.15.0-36-generic 4.15.0-36.39 amd64Signed kernel image generic ii linux-image-4.15.0-38-generic 4.15.0-38.41 amd64Signed kernel image generic ii linux-image-generic 4.15.0.38.40 amd64Generic Linux kernel image ii linux-image-unsigned-4.14.59-041459-generic 4.14.59-041459.201807280929 amd64Linux kernel image for version 4.14.59 on 64 bit x86 SMP Booting from GRUB into 4.14.59 allows my two monitors to run at their native resolution, 2560x1440. Any newer kernel does not allow my two monitors to run at their native resolution, only allowing up to 1920x1200. uname -a Linux blackbox 4.14.59-041459-generic #201807280929 SMP Sat Jul 28 09:32:10 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1799613/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
