https://bugs.kde.org/show_bug.cgi?id=509342

            Bug ID: 509342
           Summary: Moving mouse over menu bar, or app buttons or controls
                    locks/crashes KDE using Radeon IGFX on AMD Ryzen 9
                    7950X cpu
    Classification: Plasma
           Product: plasmashell
      Version First 5.27.12
       Reported In:
          Platform: Ubuntu
                OS: Linux
            Status: REPORTED
          Severity: major
          Priority: NOR
         Component: generic-crash
          Assignee: [email protected]
          Reporter: [email protected]
  Target Milestone: 1.0

SUMMARY
I am using KDE installed from synaptic on Ubuntu 24.04. It is an Asus Proart
x670e mb. I have the monitor’s hdmi cable plugged into the motherboard. There
is an nvidia card installed in the system as well which I use for computing. I
set the Asus BIOS to give the Radeon IGFX 2GB ram. On login it is using a
quarter of it as reported by nvtop, and nothing is happening on the nvidia card
- no apps are even loaded on it, everything is on the Radeon IGFX.

The KDE crash occurs after I login to KDE as a user. The crash usually occurs
when I move the mouse cursor over the menu at the bottom or over an app (any
app) button or control.  Sometimes the screen goes black for 10-15 seconds,
then comes back.  After about the third blackout, it doesn't come back and I
have to cycle the power.  Other times it will just lock as the mouse goes over
the menu or an app (any app) button or control

The crash occurs similarly on KDE (x11) as on KDE (Wayland)


STEPS TO REPRODUCE
1.  Boot the machine and login to KDE as user.
2.  Move the mouse cursor repeatedly over the menu bar at the bottom or an app
button or control.

OBSERVED RESULT
The screen will go black, then come back 10-15 seconds later.  In this mode
after about the third time it will just stay black and I will have to cycle the
power.    Another mode is that it just locks up and the power has to be cycled.

EXPECTED RESULT
Normal operation without locking.

SOFTWARE/OS VERSIONS
Operating System: Ubuntu 24.04
KDE Plasma Version: 5.27.12
KDE Frameworks Version: 5.115.0
Qt Version: 5.15.13
Kernel Version: 6.14.0-29-generic (64-bit)
Graphics Platform: Wayland
Processors: 32 × AMD Ryzen 9 7950X 16-Core Processor
Memory: 123.5 GiB of RAM
Graphics Processor: AMD Radeon Graphics
Manufacturer: ASUS

ADDITIONAL INFORMATION

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