https://bugs.kde.org/show_bug.cgi?id=506927
Bug ID: 506927
Summary: Blackscreen upon going fullscreen after waking up from
sleep with adaptive sync on
Classification: Plasma
Product: kwin
Version First unspecified
Reported In:
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: kwin-bugs-n...@kde.org
Reporter: dhra...@proton.me
Target Milestone: ---
SUMMARY
So I can find a discussion link mentioning something similar to this bug
already in KDE discussion. It's weird that it hasn't been fixed yet or that I
don't seem to find any bug reports of it here.
https://discuss.kde.org/t/black-screen-on-fullscreen-with-wayland/29368/11
Now the specific bug I've encountered is not completely the same as this
discussion link mentions. But basically whenever the PC goes to sleep (or I
think just the screen automatically turning off might be enough too, I know it
by when the message "new audio device" detected shows up), and if adaptive sync
is either on "always" or "automatic" (so basically enabled), when going to
fullscreen, the monitor just turns black, upon exiting fullscreen, picture
returns.
If adaptive sync is disabled (which to be honest, while the discussion does
suggest that, adaptive sync is useful), this issue doesn't happen, however,
this time (now I've only tested this with the mpv mediaplayer on fullscreen),
occasionally when on fullscreen the screen turns black for a few seconds and
then returns, so it's not really a complete workaround.
The best workaround I've found around this time is to just logout and log back
in, which fixes this issue. It's a bit annoying though having to basically
logout and login each time.
For info, this is on Wayland, with an AMD GPU (haven't really tested with
anything else). Here is my GPU, CPU and monitor:
AMD 7900xtx
AMD Ryzen 9 7900
MSI G274QPX
STEPS TO REPRODUCE
1. Have adaptive sync on in your settings
2. Let the PC go to sleep
3. Wake the PC up and go fullscreen
OBSERVED RESULT
Screen goes black
EXPECTED RESULT
Screen should show stuff in fullscreen
SOFTWARE/OS VERSIONS
Windows:
macOS:
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma:
KDE Plasma Version:
KDE Frameworks Version:
Qt Version:
ADDITIONAL INFORMATION
Like I said, I know the bug has happened when "New audio device detected" shows
up, which is basically always when the PC wakes up. So maybe there is something
to do with that? Though I think the message is just something that always
happens as a result of sleep/waking up.
Me having an AMD GPU might be important in reproducing this bug, as I said I
haven't tested with anything else.
I am thinking this is a kwin bug, but feel free to move this somewhere else if
it's something else, and I am not sure which component to select, so I selected
"general".
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