Bug 2333789

1. Please describe the problem:

Huawei Matebook 13 AMD with Radeon Vega 8.

After resuming from either suspend or hibernate, screen brightness control is non-effective and the system runs at full brightness. Values are changing at /sys/class/backlight/*/brightness and /sys/class/backlight/*/actual_brightness, but the screen continues at full brightness


2. What is the Version-Release number of the kernel:

kernel-6.12.5-200.fc41.x86_64


3. Did it work previously in Fedora? If so, what kernel version did the issue
   *first* appear?  Old kernels are available for download at
   https://koji.fedoraproject.org/koji/packageinfo?packageID=8 :

Yes, the fault is only present starting with kernel-6.12.5-200.fc41.x86_64


4. Can you reproduce this issue? If so, please provide the steps to reproduce
   the issue below:

Boot with kernel-6.12.5-200.fc41.x86_64, suspend or hibernate, resume.


5. Does this problem occur with the latest Rawhide kernel? To install the
   Rawhide kernel, run ``sudo dnf install fedora-repos-rawhide`` followed by
   ``sudo dnf update --enablerepo=rawhide kernel``:

Yes.


6. Are you running any modules that not shipped with directly Fedora's kernel?:

No


7. Please attach the kernel logs. You can get the complete kernel log
   for a boot with ``journalctl --no-hostname -k > dmesg.txt``. If the
   issue occurred on a previous boot, use the journalctl ``-b`` flag.


Reproducible: Always