-------- Original Message --------
Subject: Re: Unable to boot 5.18-rc kernel on amdgpu legacy (si) hardware.
From: Alex Deucher <alexdeucher@xxxxxxxxx>
To: Paul Blazejowski <paulb@xxxxxxxxxxxxxxxxxxx>
Date: 4/15/2022, 12:15:40 PM
On Fri, Apr 15, 2022 at 12:00 PM Paul Blazejowski
<paulb@xxxxxxxxxxxxxxxxxxx> wrote:
Hello,
I am unable to boot 5.18-rc1(2) kernel with my rather old (si) XFX card,
which works fine under 5.17.3 and previous kernels.
The card is identified as:
1:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Cape Verde PRO [Radeon HD 7750/8740 / R7 250E]
Running on a Asus M5A99FX PRO R2.0 mainboard.
The boot process stops at "fb0: EFI VGA frame buffer device" step and
the hdmi connected monitor just shuts off, there's not oops or any other
debug output captured by serial console.
I was able to bisect the kernel tracing this to a bad commit:
git bisect bad 3712e7a494596b26861f4dc9b81676d1d0272eaf
# first bad commit: [3712e7a494596b26861f4dc9b81676d1d0272eaf]
drm/amd/pm: unified lock protections in amdgpu_dpm.c
And reverting this commit on 5.18-rc2 kernel makes my system bootable again.
Please let me know if there's anything else i could provide to help fix
this issue. I have access to serial console if needed.
Fixed with this patch:
https://patchwork.freedesktop.org/patch/481477/
Alex,
Great!
Just tested and indeed the patch fixed the issue!
Alex
Thank you for providing the link to a patch ...
Paul
Thank you.
