Bug 447427 - Switching to linux console and back turns the displays to black
Summary: Switching to linux console and back turns the displays to black
Status: CONFIRMED
Alias: None
Product: kwin
Classification: Plasma
Component: platform-drm (show other bugs)
Version: 5.23.4
Platform: openSUSE Linux
: NOR normal
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords: wayland
Depends on:
Blocks:
 
Reported: 2021-12-23 13:00 UTC by auxsvr
Modified: 2022-09-18 21:40 UTC (History)
2 users (show)

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Description auxsvr 2021-12-23 13:00:34 UTC 
SUMMARY
Switching to linux console and back displays just the mouse cursor and the monitor positions become incorrect. The Wayland session is still in progress and I use loginctl to kill it and start sddm.

STEPS TO REPRODUCE
1. Ctrl-Alt-F1 to switch to a Linux console.
2. Alt-F7 to switch to the Wayland session.

OBSERVED RESULT
The display on both monitors is black, only the mouse pointer appears. Also, the position of the monitors becomes incorrect and the backlight of the monitor other than the one with the mouse pointer is turned off.

EXPECTED RESULT
Resume the Wayland session as it was.

SOFTWARE/OS VERSIONS
Linux: 5.15.8
KDE Plasma Version: 5.23.4
KDE Frameworks Version: 5.89.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION
On Wayland with 2 monitors.
Comment 1 aTosser 2022-09-18 21:40:46 UTC 
I also experience this on kwin_wayland. Bluetooth disconnects, eveything related to desktop vanishes and only a mouse and black background are present. Can not summon krunner or pull down a yakuake session.

Operating System: Gentoo Linux 2.8
KDE Plasma Version: 5.25.5
KDE Frameworks Version: 5.98.0
Qt Version: 5.15.5
Kernel Version: 5.19.8-gentoo-dist (64-bit)
Graphics Platform: Wayland