https://bugs.freedesktop.org/show_bug.cgi?id=107731
Martin Peres changed:
What|Removed |Added
Status|NEW |RESOLVED
Resolution|---
https://bugs.freedesktop.org/show_bug.cgi?id=107731
--- Comment #14 from James Wood ---
I was about to report having the same bug but it seems the today's Mesa
19.2.0-2 update has solved the problem, I will include what I was originally
going to post in case it's of use to anyone.
---
I've bega
https://bugs.freedesktop.org/show_bug.cgi?id=107731
--- Comment #13 from Fermulator ---
Sorry I no longer have access to the system originally reported this issue
from.
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https://bugs.freedesktop.org/show_bug.cgi?id=107731
--- Comment #12 from L.S.S. ---
Sorry, but should have commented on this much sooner.
After my last comment I eventually replaced the ATEN CS1924 KVM with a new
generic 4-port KVM that is 4K@60Hz-capable. This one does not exhibit the
issue, so
https://bugs.freedesktop.org/show_bug.cgi?id=107731
--- Comment #11 from L.S.S. ---
So is there a possible workaround for monitors/KVMs that could cause this
issue? Sadly for 4-port DisplayPort KVMs with working 4K@60 there are very few
alternatives... most are either only DP 1.1 or only 4K@30.
https://bugs.freedesktop.org/show_bug.cgi?id=107731
--- Comment #10 from Alex Deucher ---
(In reply to L.S.S. from comment #9)
> Just tested... it seems if I connect to the monitor directly the problem
> doesn't occur.
>
> Guess the KVM does play a part in this. However, I still need the KVM as
https://bugs.freedesktop.org/show_bug.cgi?id=107731
--- Comment #9 from L.S.S. ---
Just tested... it seems if I connect to the monitor directly the problem
doesn't occur.
Guess the KVM does play a part in this. However, I still need the KVM as I've
four PCs connected to this monitor.
It's not a
https://bugs.freedesktop.org/show_bug.cgi?id=107731
--- Comment #8 from Harry Wentland ---
(In reply to L.S.S. from comment #7)
> from what I could find out. Before using a KVM (that I'm swapping between
> its HDMI and DP inputs that were connected to different places), whenever I
> switch the a
https://bugs.freedesktop.org/show_bug.cgi?id=107731
--- Comment #7 from L.S.S. ---
Unfortunately I cannot test this on my monitor (Lenovo ThinkVision P27). While
it only has options for DP or HDMI input (no Auto select), it seems to actively
cycle through the input signals when powering on, resum
https://bugs.freedesktop.org/show_bug.cgi?id=107731
--- Comment #6 from Harry Wentland ---
Thanks. This is definitely a link training failure.
Can you see if your monitor is set to auto-select the input and force it to
select the DP input? Some monitors don't respond well to link training when
a
https://bugs.freedesktop.org/show_bug.cgi?id=107731
L.S.S. changed:
What|Removed |Added
CC||ragnaros39...@yandex.com
--- Comment #5 from L
https://bugs.freedesktop.org/show_bug.cgi?id=107731
--- Comment #4 from Harry Wentland ---
Can you post a dmesg log with drm.debug=4?
I suspect it's because of a link training failure. drm.debug=4 should confirm
that.
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https://bugs.freedesktop.org/show_bug.cgi?id=107731
--- Comment #3 from L.S.S. ---
Forgot to mention this. Regardless of the circumstances, the EDID I got using
"xrandr --prop" is identical to the one when the screen resolution is correct
(4K@60Hz), so in my case, the monitor is always correctly
https://bugs.freedesktop.org/show_bug.cgi?id=107731
--- Comment #2 from L.S.S. ---
Some extra information.
uname -r
4.20.11-1-MANJARO
The correct xrandr output:
Screen 0: minimum 320 x 200, current 3840 x 2160, maximum 16384 x 16384
DisplayPort-0 connected primary 3840x2160+0+0 (normal left in
https://bugs.freedesktop.org/show_bug.cgi?id=107731
--- Comment #1 from L.S.S. ---
Having similar issues with Manjaro Linux (4.20 Kernel) and AMD video cards.
I've a 4K@60Hz capable monitor (Lenovo ThinkVision P27) and an ATEN CS1924 KVM
behind it (as I need to use this monitor for 4 different P
https://bugs.freedesktop.org/show_bug.cgi?id=107731
Fermulator changed:
What|Removed |Added
See Also||https://bugs.freedesktop.or
https://bugs.freedesktop.org/show_bug.cgi?id=107731
Bug ID: 107731
Summary: radeon (amdgpu) DisplayPort loss of max-resolution on
DP monitor (after monitor power saving / idle)
Product: DRI
Version: XOrg git
Hardware: x86-6
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