Re: panic -> switch to cosole with drm-kmod?

On 10/02/2025 23:33, Bjoern A. Zeeb wrote:
> Problem now is that I can panic it quite badly but I am stuck on the X
> screen.  Was there a way to make it switch to v0 on panic so one can
> use the kernel debugger?

Hi!

Also it didn’t always worked before, when I changed drm-kmod to 
integrate with vt(4) using a Linux-compatible fbcon API for the update 
to DRM 5.17, I think that part regressed even more. I couldn’t figure 
out what call(s) should be made to ask the driver to switch mode. Even 
in Linux, there are multiple code path that are unclear to me. None of 
the things I tried worked.

I had to do this change because the amdgpu driver dropped the old way of 
integrating with the console (old way = driver-specific console setup) 
to use the generic code. The i915 and radeon drivers are still using the 
old approach but it is bound to the new integration and the switch 
during panic is broken for them too.

-- 
Jean-Sébastien Pédron
The FreeBSD Project