[Bug 42509] The Witcher 3 hangs the system on startup

https://bugs.winehq.org/show_bug.cgi?id=42509

--- Comment #3 from Shmerl  ---
It occurs both with and without CSMT. I logged in remotely, to check the
system. CPU / RAM usage were normal. Any suggestion how to check VRAM
utilization?

I tried using something like:

GALLIUM_HUD_DUMP_DIR=$HOME/tmp GALLIUM_HUD=VRAM-usage ...

To dump data to a log, but it hangs before Mesa starts logging anything
apparently (the log file is created, but it remains empty). radeontop doesn't
like Debian testing kernel, as they note:
> For the amdgpu driver, only the mem path is
> currently supported - for those cards, this
> means radeontop won't run on the default Ubuntu
> kernels that block /dev/mem

so it can't show VRAM utilization.