https://bugs.kde.org/show_bug.cgi?id=455795
Bug ID: 455795
Summary: Turning off the screen/dpms before suspending causes
the screen to stay black after resuming.
Product: kwin
Version: 5.25.1
Platform: Archlinux Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: andrej.h...@gmail.com
Target Milestone: ---
Created attachment 150058
--> https://bugs.kde.org/attachment.cgi?id=150058&action=edit
output of journalctl -b
On my laptop (Asus Zephyrus G15 GA502IV (2020 Model)) if I turn off the screen
to save power by using the "turn off screen" shortcut (that's located in Power
Management shortcuts) and I suspend my laptop by closing the lid and then wake
it up the screen is black and I can only switch to different tty and kill the
kwin process to be able to log in again.
When I check the journalctl, errors such as these appear:
"kwin_wayland[942]: kwin_wayland_drm: Couldn't parse EDID for connector
DrmConnector(id=78, gpu=KWin::DrmGpu(0x55afeb53ff10), name="eDP-1-unknown",
connection="Connected", countMode=14)"
"kwin_wayland[942]: kwin_wayland_drm: Setting dpms mode failed!"
I am using Arch with the latest packages and I am using wayland.
I can't get kwin to crash.
STEPS TO REPRODUCE
1. Turn off screen
2. Suspend while the screen stays off
3. Resume from suspend
OBSERVED RESULT
Screen stays black
EXPECTED RESULT
Login screen should appear.
SOFTWARE/OS VERSIONS
KDE Plasma Version: 5.25.1
KDE Frameworks Version: 5.95.0
Qt Version: 5.15.5
ADDITIONAL INFORMATION
If I suspend my system without turning off the screen first it behaves as it
should.
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