https://bugs.freedesktop.org/show_bug.cgi?id=104205
Bug ID: 104205
Summary: displayport connected monitor doesn't initialize
display
Product: xorg
Version: unspecified
Hardware: x86-64 (AMD64)
OS: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: Driver/AMDgpu
Assignee: xorg-driver-ati@lists.x.org
Reporter: magn...@gmail.com
QA Contact: xorg-t...@lists.x.org
I have a LG 29UB55-B 21:9 monitor connected via DisplayPort to a Radeon R7 370
card
after boot when xorg loads 99% of the time the monitor won't see a signal and
goes to sleep
once its woken back up by its power button it sees the normal screen at its
native res of 2560x1080
I also see I assume the same problem if i change resolution down to 1920x1080
its fine but switch back to 2560x1080 and screen goes to sleep with no signal
wake it back up and fine again at 2560
I see the below in dmesg:
[ 6.400479] [drm:radeon_dp_link_train [radeon]] *ERROR* clock recovery
reached max voltage
[ 6.400523] [drm:radeon_dp_link_train [radeon]] *ERROR* clock recovery
failed
kernel is 4.14.4 currently it's been going on since I got the monitor
I don't recall what version that was.
xorg is on 1.19.5
amdgpu driver is 1.4.0
also tried the radeon driver and acts same
haven't tried binary drivers
no errors in xorg log
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