https://bugs.kde.org/show_bug.cgi?id=385885
Henrik Fehlauer <rk...@lab12.net> changed:
What |Removed |Added
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CC| |rk...@lab12.net
--- Comment #3 from Henrik Fehlauer <rk...@lab12.net> ---
Thanks for the video Clemens, that goes a long way in understanding what "The
secondary monitor goes white." from the original report actually means.
I can reproduce the issue in a VM. Preliminary findings:
- Does not depend on compositing vs. non-compositing code path.
- Actual resolution of the monitors is irrelevant, you just need at least two.
- "QT_SCALE_FACTOR=1.4 spectacle -rb" is enough, no need for session scaling.
- Other methods of capturing are fine.
- For 2.1x scaling or different resolutions, the white area can sometimes
appear at the bottom.
- The displacement depends on the scaling factor.
- The displacement depends on the amount of overlap of both displays in
"kcmshell5 kcm_kscreen".
Thus the issue is probably somewhere in the UI of the rectangular region
picker, perhaps only some scaling factor or a term in some calculation missing.
Let us know if you want to try to come up with a patch, we can get you started.
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