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

[Linux regression tracking (Thorsten Leemhuis)]

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)

> 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`

Please provide a full kernel log, this is needed to full understand the
problem

> And this issue has not been fixed in kernel version 7.0, which I guess
> is set to be the next LTS kernel.

No, it's not.

> 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!

FWIW, you seem to assume that the problem hits everyone with a AMD GPUs.
That's not the case, we'd know this by now. Maybe it's not even
something that hits everyone with a card/gpu like yours, as some falires
only show up in certain environments, for example in combination with a
specific mainboard chipset or firmware.

Anyway: I CCed a few people that might be able to help. But they likely
will need at least the full kernel log mentioned above .

Ciao, Thorsten