Created attachment 131454 [details] The black desktop with no icons SUMMARY When the display settings are set to only use the external display, rebooting (this does not happen every boot, but it is frequent ~every 4 or 5 reboots) boots to a black desktop (no background, no icons, right click does nothing), however, the taskbar and the launcher are visible (a.k.a. the default panel I guess?). Using Meta+P to change the display output to the laptop monitor and does show the full desktop, and then switching back to only the external monitor does fix the problem. I am using nouveau (I had installed nvidia previously and then unistalled it, and 'unblacklisted' nouveau from modprobe.d files). STEPS TO REPRODUCE 1. Set the display output to only use the external monitor using System Settings (I am using Xorg) 2. Reboot 3. Login (I am using autologin, as setup by Yast while installing OpenSUSE) Operating System: openSUSE Leap 15.2 KDE Plasma Version: 5.18.5 KDE Frameworks Version: 5.71.0 Qt Version: 5.12.7 Kernel Version: 5.3.18-lp152.36-default OS Type: 64-bit Processors: 8 × Intel® Core™ i7-7700HQ CPU @ 2.80GHz Memory: 15,5 GiB of RAM ADDITIONAL INFORMATION It seems to me that Plasma tries to load the desktop on the disabled display (internal monitor), so that's why, when I change the output display, it shows up, and changing back, shows the desktop as well (black desktop gone, icons are back).
How odd.
I should have taken a look before posting, it seems like very similar issues have been reported previously. What piques me is the fact that it happens inconsistently across reboots. Mainly looking at #391531. I haven't tested for this on Wayland since I can't get it running properly (weird artifacts when resizing windows-optimus laptop).
I have a similar issue which as I may wrongly connect to recent Qt update because everything was fine before. Yesterday after reboot I've got messed up wallpapers on second monitor. Monitor on the right is vertical and wallpaper covers only top half of the screen. Wallpaper set to "tiling" but if I toggle mode, plasma still shows black background in lower half. It seems like plasma missing information about display rotation in my case and just tries to render wallpaper as if monitor were horizontal. Windows placement etc works as expected though.
Found some nvidia driver leftovers (module was being loaded but doing nothing)... got rid of those and the issue has not been happening for now. Still something weird because the display worked fine once it was booted, even logging out and back in fixed the black screen thing... still looks like a bug or an unhandled exception to me.
I filed a similar bug report here: https://bugs.kde.org/show_bug.cgi?id=426764 Seems that with more than 2 monitors on optimus laptops the black screen happens on every boot. Im using optimus manager set to NVIDIA mode
*** Bug 426764 has been marked as a duplicate of this bug. ***
It happened today again, so at least I know it's not an NVIDIA driver thing because I checked the loaded modules and I could confirm I was using only nouveau. I also read the following report: https://bugs.kde.org/show_bug.cgi?id=369450 Seems to match my situation and the behavior is exactly the same.
Created attachment 132372 [details] journalctl and dmesg output journalctl was captured about 30 minutes before posting this. (the issue happened again that boot). I booted the system around 20:50, and hope these logs might shed some light on what's going on. Current versions: Operating System: openSUSE Leap 15.2 KDE Plasma Version: 5.18.5 KDE Frameworks Version: 5.71.0 Qt Version: 5.12.7 Kernel Version: 5.3.18-lp152.44-default
GPU does not seem to be relevant here; marking as a dupe of the master issue which is GPU-independent. *** This bug has been marked as a duplicate of bug 391531 ***
Probably different, sorry for the noise.
*** Bug 427383 has been marked as a duplicate of this bug. ***
A not of work was done with NVIDIA Optimus setups for Plasma 5.23. Can someone with such a setup please test the Plasma 5.23 beta (or wait a week and try the final release) and see if the issue is fixed now? Thanks!
Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging If you have already provided the requested information, please mark the bug as REPORTED so that the KDE team knows that the bug is ready to be confirmed. Thank you for helping us make KDE software even better for everyone!
This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!