Resolution drop with AMD Kaveri when using xf86-video-amdgpu driver. At best, up to 1600x900, sometimes up to 1024x768. And the modes above are not available. DP connection. Monitor resolution 1080p. Distr: Arch DRM driver: amdgpu Options root= amdgpu.cik_support=1 radeon.cik_support=0
Please attach the output of dmesg and the Xorg log file.
Created attachment 142777 [details] xorg log
Created attachment 142778 [details] dmesg log
Looks like the kernel driver fails to retrieve the EDID of the monitor. Does amdgpu.dc=1 on the kernel command line help? If not, please attach the corresponding logs again.
Not do. On this version of the kernel, it is by default dc=1
Please try it anyway. The attached dmesg shows DC being disabled.
With the option DC=1 in the black screen. accordingly, dmesg can't do
Please attach your dmesg output and xorg log with amdgpu.dc=1
Now the bug does not appear. Perhaps this is due to the fact that I set all the parameters before installing Arch, or it was fixed.
-- GitLab Migration Automatic Message -- This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity. You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/646.
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.