Virtualbox crashes with monitor scaling > 125% in a wayland session

Virtualbox crashes on a 4K monitor with monitor scaling > 125% in a wayland session (but not in an X11 session).

I am on KDE plasma 6.6.4 with a Nvidia card and the latest driver 595.58.03 (nvidia-open). The kernel is 6.19.11-1. I have a two-monitor configuration with 2 identical 4K monitors. If I set a monitor scaling factor larger than 125%, the virtualbox app crashes immediately on start. It works correctly for scaling factors 100% and 125%. Is this a known bug and, if so, how can I prevent it? I have tried all sorts of Qt flags, like QT_SCALE_FACTOR, but nothing helps.

Deactivating one of the monitors did not help either. So it appears that it has nothing to do with the 2 monitor setting.

I now tested this with a monitor with lower resolution on another computer with the same result. So it seems a setting > 125% always causes a crash of virtualbox (and actually the plasma desktop).

Hi @Tatue and welcome back. :vulcan_salute:

We currently have no proper system information to work with; a brief summary usually isn’t enough. :wink:

For us to provide advice or suggestions it will very likely help if you provide your full inxi output:

inxi -zv8

… please use the code formatting (the </> button at the top of the Reply window after highlighting the pasted Terminal output, or the three backticks ``` on lines above and below the pasted text).

Note: This output is privacy-filtered using the above command.

Hopefully the knowledgeable people on here will be able to assist, then. :wink:

Cheers!

Even 200% crashes?

It’s a nice square2 of everything and things are happier there. Other DEs may only let you increment in squares, if at all.

Seems to be a Wayland-Virtualbox only thing, given this limited information.

I avoid anything Oracle myself.. They have ruined a few technologies I used to love. :face_with_peeking_eye:

Went looking for similar issues and found your bug report ([Bug]: On KDE plasma / wayland / nvidia -> virtualbox crashes with monitor scaling > 125% · Issue #622 · VirtualBox/virtualbox · GitHub). In case you missed it, they’re asking for your logs.

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