https://bugs.kde.org/show_bug.cgi?id=434304
Bug ID: 434304
Summary: Cannot resume from suspend to RAM
Product: kwin
Version: 5.21.2
Platform: Archlinux Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: cont...@scrumplex.net
Target Milestone: ---
SUMMARY
When running KWin on Wayland I can't resume from RAM anymore.
I isolated this to only happening when the screens are switched off by "Screen
Energy Saving" before the suspend is happening.
STEPS TO REPRODUCE
* Login into Plasma/Wayland session
* Set Screen Energy Saving "Switch off after" to a low value like 1min
* Wait until the screen(s) get(s) switched off
* Run "sudo systemctl suspend" via SSH
* Try to wake
OBSERVED RESULT
Computer does not wake from sleep. Fans turn on, kernel does not boot, as
journalctl -b-1 only shows the point until suspend.
EXPECTED RESULT
Computer resumes from sleep.
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.21.2
KDE Frameworks Version: 5.79.0
Qt Version: 5.15.2
Kernel Version: 5.11.6-arch1-1
OS Type: 64-bit
Graphics Platform: Wayland
Processors: 24 × AMD Ryzen 9 3900X 12-Core Processor
Memory: 31.3 GiB of RAM
Graphics Processor: Radeon RX Vega
ADDITIONAL INFORMATION
I am using a GIGABYTE Radeon RX Vega 56 and the amdgpu kernel driver.
I suspect a bug regarding KMS here. This might even be a kernel bug, though I
only experience this bug with KWin on Wayland, never on X11.
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