Thank for your help.
I will wait a fix to the bug. I am managing to work in the current situation.
In fact, now I'm using both monitors with limitations but I can live with it :-)
Hope for a quick fix
Any improvement when running kquitapp5 plasmashell && plasmashell once the system has fully booted up?
kquitapp5 plasmashell && plasmashell
Running "kquitapp5 plasmashell && plasmashell" works perfect.
It recovers my initial configuration of destop. Minor adjustments are needed (some icons lost).
Until official fix to bug, this solution works great.
Thank you very much Demm
Can both of you test patched qt5-base? Patch used is from this bug report:
sudo pacman -U http://kaosx.tk/repo/build/qt5-base-5.15.1-2-x86_64.pkg.tar.zst
Since the patch is not approved yet, this version won't move from the build repo, until it is tested as fixing the multi screen issue.
I have installed. After reboot I reconfigured the monitor layout and wallpapers again. The config was kept after 3 reboots.
I think this fix is working
The patch does not work for me. The system behave just like at the beginning.
I keep using the command you listed-
One more rebuild for qt5-base is up, this time with the change that started this issue reverted:
sudo pacman -U http://kaosx.tk/repo/build/qt5-base-5.15.1-3-x86_64.pkg.tar.zst
With the last patch I have recovered the original functionality.
Everything seems to work OK after 2 reboots.
demm Today after a reboot, It happened again!
The bug report seems to be fixed with a new QT version. I'll have to try with that compiled
A patch is now accepted upstream (no longer taken from any bug report), one more rebuild is up, again, please test & report back:
sudo pacman -U http://kaosx.tk/repo/build/qt5-base-5.15.1-4-x86_64.pkg.tar.zst
No problems with that last patch. Everything works as usual.