> I've had intermittent hard crashes on my amdgpu machine too, starting at some
> point between 7.8 and 7.9 (and, at first, I ascribed it to another cause, so
> I didn't
> really note when it started happening). I now _think_ it's caused by programs
> --
> including, but not only Firefox -- that use hardware acceleration
> (in my case e.g. Alacritty). Unfortunately I have absolutely no idea why and
> given
> how big amdgpu and friends are, debugging this must be a nightmare.
Since filing the bug report I found that the work-around of disabling hardware
acceleration in Firefox was insufficient. Running llama.cpp with Vulkan
acceleration also sometimes triggered the freeze. This indicates that it might
be the GPU driver generally rather than just an interaction with Firefox.
Your experience with Alacritty seems consistent with that assumption.
> If you have the ability to do so, you could bisect snapshots (e.g. using
> [1]) and see when the problem was introduced. If that narrows it down,
> it might make a big difference to fixing things.
I upgraded from 7.9 to a current snapshot:
$ sysctl kern.version
kern.version=OpenBSD 7.9-current (GENERIC.MP) #2: Fri Jun 12 12:08:26 MDT 2026
[email protected]:/usr/src/sys/arch/amd64/compile/GENERIC.MP
After moving to current, I reenabled Firefox acceleration and ran benchmarking
of
llama.cpp with Vulkan. I have not managed to reproduce the freeze with this
snapshot
and I was able to reproduce it somewhat reliably with 7.9. I feel that I need to
use the system a bit more intensely before I can be confident the issue is
gone, but
this indicates the issue has already been resolved with some change between 7.9
and the June 12, 2026, snapshot.
