Bug 489655

I use a laptop and an external monitor.

The laptop is powered with a wall adapter that has two USB-C outputs: one of them goes to an Anker 8-in-1 USB-C dongle, where I connect my wireless mouse+keyboard USB-A transmitters, external monitor HDMI cable, and which also acts as a power delivery "relay" for my laptop, as it ultimately provides power to it via USB-C.

For whatever reason, when I connect another device to the second USB-C output of the wall charger, the Anker dongle must detect a brief drop in supplied power, and briefly disconnects the external monitor (I think it doesn't have enough juice to power the HDMI chip).

This only lasts a couple of seconds, during which I can see that Plasma goes back to single display mode (i.e. all my apps and "main display" taskbar move back to the laptop display).

All fine and dandy until this point. When the brief power shortage goes away, Plasma again tries to restore the dual monitor setup, but here's where it crashes. I can tell because I initially only see the wallpapers on both displays, and the empty space for task bars is filled in a while later.

Core dump is attached. I haven't heard from DrKonqi for this one, maybe it would've detected it's a known issue.

https://gist.github.com/andreaippo/c4aa2f855d49516dbb4eff6d46366eab

System info:

Operating System: openSUSE Tumbleweed 20240701
KDE Plasma Version: 6.1.1
KDE Frameworks Version: 6.3.0
Qt Version: 6.7.2
Kernel Version: 6.9.7-1-default (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 7840U w/ Radeon 780M Graphics
Memory: 30.7 GiB of RAM
Graphics Processor: AMD Radeon 780M
Manufacturer: Framework
Product Name: Laptop 13 (AMD Ryzen 7040Series)
System Version: A7

Thanks :)