Clone of upstream bugreport:https://bugs.freedesktop.org/show_bug.cgi?id=107465 Attachments are on upstream bugzilla Videocard: RX480 OS: Fedora 28 KDE Kernel 4.17.9-200.fc28.x86_64 Sometimes when I poweroff the screen, then after some time I turn on it again, the system cannot recognize native screen resolution, and sets it to a weird one. In Plasma system settings, the monitor name is unknown and the native resolution is missing (1600x1050), other resolutions are available instead.. After playing with some resolutions, suddendly the screen name (ViewSonic etc.) returns back. MrCooper user in #radeon Freenode chat, suggested me to start the system with amdgpu.dc=0 flag. 24 hours of testing seems to confirm that such flag fixes the problem. I attach dmesg and xorg.0.log of system experiencing the problem
Just a clarification: title "amdgpu.dc=1" is not meant as having amdgpu.dc=1 as setted boot parameter, the situation is: no boot parameter = problem triggered amdgpu.dc=0 = no problem
This message is a reminder that Fedora 28 is nearing its end of life. On 2019-May-28 Fedora will stop maintaining and issuing updates for Fedora 28. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as EOL if it remains open with a Fedora 'version' of '28'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version. Thank you for reporting this issue and we are sorry that we were not able to fix it before Fedora 28 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora, you are encouraged change the 'version' to a later Fedora version prior this bug is closed as described in the policy above. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete.
At the moment I cannot access to the affected machine, so if in the future I will experience it again, I will reopen the bugreport
Fedora 28 changed to end-of-life (EOL) status on 2019-05-28. Fedora 28 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed.