https://bugs.kde.org/show_bug.cgi?id=482698
Bug ID: 482698
Summary: kscreen-doctor disables screen instead of enabling it
Classification: Plasma
Product: KScreen
Version: 5.24.7
Platform: Kubuntu
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: common
Assignee: kscreen-bugs-n...@kde.org
Reporter: cont...@yannsalmon.fr
Target Milestone: ---
Created attachment 166575
--> https://bugs.kde.org/attachment.cgi?id=166575&action=edit
Situation where DP-0 is working as single screen
SUMMARY
When invoking kscreen-doctor to enable a secondary screen, the primary screen
gets disabled.
STEPS TO REPRODUCE
1. Write a script kscreen-switch with the following content :
if [[ "$(xrandr --listactivemonitors | grep -c DVI-D-0)" == "0" ]]; then
kscreen-doctor output.DVI-D-0.enable output.DVI-D-0.position.-1920,0
else
kscreen-doctor output.DVI-D-0.disable
fi
2. Invoke the script.
3. Invoke the script again.
OBSERVED RESULT
On first invocation, DVI-D-0 goes live and DP-0 goes blank.
On second invocation, DVI-D-0 does blank.
EXPECTED RESULT
On first invocation, DP-0 should not go blank.
SOFTWARE/OS VERSIONS
Operating System: Kubuntu 22.04
KDE Plasma Version: 5.24.7
KDE Frameworks Version: 5.92.0
Qt Version: 5.15.3
Kernel Version: 5.15.0-97-generic (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Xeon® CPU E3-1245 v5 @ 3.50GHz
Memory: 15.5 Gio of RAM
Graphics Processor: NVIDIA GeForce GTX 1650/PCIe/SSE2
ADDITIONAL INFORMATION
Explicitly adding output.DP-0.enable to each line of the script makes DP-0 go
live in second invocation, but does not prevent it from going blank in the
first.
On first invocation with that addition, the console shows
Enabling output 444
kscreen.doctor: Output position QPoint(-1920,0)
kscreen.doctor: Set output position QPoint(-1920,0)
Enabling output 455
kscreen.doctor: setop exec returned KScreen::Config(
KScreen::Output(444, "DVI-D-0", connected enabled, pos: QPoint(0,0), res:
QSize(-1, -1), modeId: "", scale: 1, clone: no, rotation:
KScreen::Output::None, followPreferredMode: false)
KScreen::Output(455, "DP-0", connected enabled primary, pos: QPoint(1920,0),
res: QSize(3840, 2160), modeId: "456", scale: 1, clone: no, rotation:
KScreen::Output::None, followPreferredMode: false) )
Which is not consistent with the fact that DP-0 goes blank.
However, the log produced by kscreen-console bug show that something pertaining
to DP-0 is disabled.
Setting up the dual screen configuration with the GUI from Plasma works
properly.
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