Bug 426854

Created attachment 131858 [details]
KDE plasma shell crash during 2nd consecutive resume from sleep

SUMMARY
Plasma Shell crashes and Black side panel in Settings after resuming from Suspend (NVidia)

STEPS TO REPRODUCE
1. Put the computer in Sleep Mode.
2. Resume the computer from sleep.
3. The settings side panel is black (Already reported bug: https://bugs.kde.org/show_bug.cgi?id=424592)
4. Leave the computer idle for 5 minutes or until the computer locks itself.
5. The Plasmashell crashes with it being unresponsive to keyboard shortcuts and mouse inputs but the cursor is still movable.

Alternative STEPS TO REPRODUCE
1. Put the computer in Sleep Mode.
2. Resume the computer from sleep.
3. Again put the computer in Sleep Mode.
4. Resume the computer from sleep.
5. Now the plasma shell goes into a black screen or has some broken pieces of applications shown (Picture added in attachment)

OBSERVED RESULT
  The Plasmashell, when resuming after suspend and letting the computer sit idle until the lock screen appears, crashes with all the applications still being open but not intractable using either mouse or keyboard. The only way to get a working plasmashell is to drop into TTY and replace plasmashell or use Alt+SysRq+K and login again or to reboot the computer as a last resort.

  The second thing that I noticed is that when I put my computer for sleep for the second time in a row, it showed some parts of the application like shown in the attachment and wasnt intractable too (no moving mouse pointer this time).

EXPECTED RESULT
  Smooth suspend and resume without any crashes. No blank black panel in Settings Application - Bug already reported (People who also have this issue in Reddit:- https://www.reddit.com/r/kde/comments/iuhaef/black_settings_panel_after_waking_from_sleep/ ; https://www.reddit.com/r/kde/comments/ixelhj/does_anybody_know_why_the_sidebar_in_the_settings/).

SOFTWARE/OS VERSIONS
(Arch Linux)
Kernel & Version:- linux-tkg-pds-skylake-5.8.10-17 (Also tested with Arch's Latest Official Kernel)
KDE Plasma Version: 5.19.5
KDE Frameworks Version: 5.74.0
Qt Version: 5.15.1

ADDITIONAL INFORMATION

CPU: Intel Core i5 7500
Graphics Card: Nvidia GeForce GTX 1060 6GB
Graphics Driver Version: NVidia Proprietary Drivers 455.23.04-1
RAM: 16 GB
Dual Monitor Setup