Reuse framebuffer after a kexec (amdgpu / efifb)

[Guilherme G. Piccoli]

On 10/12/2021 11:16, Alex Deucher wrote:> [...]
> Why not just reload the driver after kexec?
> 
> Alex

Because the original issue is the kdump case, and we want a very very
tiny kernel - also, the crash originally could have been caused by
amdgpu itself, so if it's a GPU issue, we don't want to mess with that
in kdump. And I confess I tried modprobe amdgpu after a kdump, no
success - kdump won't call shutdown handlers, so GPU will be in a
"rogue" state...

My question was about regular kexec because it's much simpler usually,
we can do whatever we want there. My line of thought was: if I make it
work in regular kexec with a simple framebuffer, I might be able to get
it working on kdump heheh