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

[Brandon Taylor]

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

Sorry if I came across as insulting; that was most definitely not my
intention. I simply know Linus' penchant for going insane when an
error is found in his kernel. But I'm thinking Timur's probably right;
this may merely be a "me" problem, with my particular GPU.

At any rate, I've created the issue ticket as requested, and here it
is. https://gitlab.freedesktop.org/drm/amd/-/work-items/5220

Brandon Taylor

On Mon, Apr 27, 2026 at 9:01 AM Timur Kristóf <timur.kristof@xxxxxxxxx> wrote:
>
> 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
>
>
>