Bugzilla – Bug 1079547
amdgpu/Polaris11: Wrong low resolution after running xrandr or switching off/on monitor
Last modified: 2018-07-05 14:08:16 UTC
Created attachment 758975 [details]
xorg right after changing resolution
Some issues with screen resolution.
Resolution is ok after reboot (3840x2160) but when i switch monitor off/on resolution changes to 1368x768.
Same effect when i run xrandr in Konsole after reboot. Resolution changes to
After resolution changes to lower it is impossible to make it higher.
amdgp, radeon rx 560
Linux localhost 4.15.0-1-default #1 SMP PREEMPT Wed Jan 31 07:03:28 UTC 2018 (ac01747) x86_64 x86_64 x86_64 GNU/Linux
Screen 0: minimum 320 x 200, current 1368 x 768, maximum 16384 x 16384
DisplayPort-0 connected primary 1368x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
684x384 59.88 59.85
640x400 59.88 59.98
640x360 59.86 59.83
512x288 60.00 59.92
480x270 59.63 59.82
HDMI-A-0 disconnected (normal left inverted right x axis y axis)
DVI-D-0 disconnected (normal left inverted right x axis y axis)
Created attachment 758978 [details]
dmesg after broken resolution
Hmm. Looks like a bug in amdgpu KMS driver. :-(
Hmm. Is this still reproducable with the latest TW kernel?
Unfortunately my hardware(Radeon RX560) died, so it is impossible to reproduce the bug. I'm sorry.
Ok. Then better close this issue.