Re: [REGRESSION] amdgpu error -22 first encountered in kernel 6.19, not fixed in 7.0

[Timur Kristóf]

Hi,

Thank you Thorsten for forwarding this to me, indeed I am working on improving 
the driver for these GPUs. See my replies below.

On Monday, April 27, 2026 11:37:53 AM Central European Summer Time Thorsten 
Leemhuis wrote:
> [note: please remove Timo Lindfors when replying to this mail and
> include Timur Kristóf – sorry everyone and especially Timo, my mailers
> address book tricked me]
> 
> On 4/27/26 11:35, Linux regression tracking (Thorsten Leemhuis) wrote:
> > On 4/26/26 01:22, Brandon Taylor wrote:
> >> I have an AMD Radeon R9 270X GPU (yes, I know it's old) which used to
> >> default to the `radeon` firmware
> > 
> > FYI, as using the wrong terms can lead to confusion while dealing with
> > bugs: that's not a firmware, that's the driver (sometimes also called
> > kernel module)

- "radeon" is the old kernel driver for these GPUs that didn't support Vulkan 
and therefore was mostly useless for gaming.
- "amdgpu" is the new driver, which supports Vulkan and offers better perf, 
this is the default since Linux 6.19.

I don't think this is a firmware issue.

> > 
> >> on kernel versions up to and
> >> including 6.18. I could manually change this behavior to use the new
> >> `amdgpu` firmware by setting `radeon.si_support=0 amdgpu.si_support=1`
> >> as kernel parameters in the GRUB bootloader. Everything worked fine,
> >> and I was able to play my Windows games without any problems.
> >> 
> >> That was, until kernel version 6.19 came out.>
> >> 6.19, from what I was able to Google, was supposed to have AMD GPUs to
> >> default to the new `amdgpu` firmware. Unfortunately, when I updated
> >> the kernel and rebooted, I got a black screen.
> >> 
> >> Further Google searches led me to reboot, set `nomodeset` in the
> >> kernel parameters, switch to a TTY, login, and investigate the output
> >> of a `dmesg` command — and what I saw ... Well, let's just say it's
> >> the kind of thing that would make Linus go Chernobyl:
> >> 
> >> `amdgpu: probe with driver amdgpu failed with error -22`
> > 

I am sorry this happened and understand the frustration.

Please open an issue here:
https://gitlab.freedesktop.org/drm/amd/-/work_items/new
and upload your full dmesg log. Please ping me personally @Venemo on that 
issue after you opened it so we can start investigating what is wrong there.

I got curious so I plugged in my R9 270X right now. I am typing this email on 
a computer with a Radeon R9 270X using Linux 6.19.12 on Fedora 43 and it works 
fine. We are going to need to need more details in order to diagnose what the 
problem really is. We might ask you to test some proposed fixes, considering 
that the issue doesn't happen on my R9 270X, I don't have a way to verify it.

> >> Now, I hope to God that this email finds whoever is responsible for
> >> breaking this `amdgpu` firmware before the same thing happens to Linus
> >> via Fedora 44, and he goes berserk. I realize that's not a heck of a
> >> lot of time, but God only knows HOW many Linux users with AMD GPUs are
> >> pissed off by this kind of issue — and I for one can only imagine how
> >> Linus' reaction will compare when it happens to HIM!

I'm happy to help, there is no need for personal insults.

(Note that the issue clearly doesn't affect all AMD GPUs and it clearly doesn't 
even affect all R9 270X GPUs.)

Thanks & best regards,
Timur