Bug Report: linux-firmware-amdgpu 20260622 prevents clean poweroff

[Benny_Maas]

System:

• Distro: CachyOS
• Kernel: 7.1.1-2-cachyos
• GPU: AMD RX 6800-series
• Bootloader: GRUB

Problem:
After updating linux-firmware-amdgpu from 1:20260519-1 to 1:20260622-1, the system no longer shuts down completely when running poweroff. Fans, keyboard LEDs, and power button LED remain active after the shutdown sequence. The system hangs after Sending SIGTERM to remaining processes... and never reaches full power-off (ACPI S5).

Relevant log excerpt (journalctl -b -1):

Jun 27 02:04:14 cachyos systemd-shutdown[1]: Sending SIGTERM to remaining processes...

(no further entries — system hangs here)

Workaround:
Downgrading to linux-firmware-amdgpu 1:20260519-1 resolves the issue completely.

Steps to reproduce:

1. Update linux-firmware-amdgpu to 1:20260622-1
2. Run poweroff
3. System hangs — power is not cut

Additional notes:
The root cause appears to be that the new firmware blob prevents the amdgpu driver from cleanly releasing the GPU before the ACPI S5 power state transition. No other packages updated at the same time produced this behavior.

This issue was researched and this report was drafted with the assistance of Claude (Anthropic AI).

[axra]

I guess it’s a Kernel Bug.

Title: System fails to power off completely on Kernel 7.1 / 7.2 (Hardware remains active on Gigabyte B550)

Hello developers, I am experiencing a persistent shutdown issue after upgrading to the latest kernel branches. When triggering a normal power-off from KDE Plasma or the terminal (sudo poweroff / shutdown now), the operating system shuts down successfully and the screen goes black, but the hardware remains fully powered. Motherboard lights, CPU/chassis fans, and the GPU remain running indefinitely. ​This issue is present in the latest Kernel 7.1 / 7.2 release candidate branches in CachyOS, sugge…

[stephane]

report here for amdgpu : Making sure you're not a bot!

[Henrrypoop]

Interesting, I have an rx 6800xt, and have also updated the system, this happens shortly afterwards Shutdown sometime stalls, monitor turns off, pc stays on - #9 by Henrrypoop . But somehow changing back to sddm, lets me shutdown, instead of a stall. Might try to downgrade this, and go back to plasmalogin.

EDIT: JUST SHUTDOWN WITH SDDM, still the same, this happens so sporadically, I don’t even know, gonna try to downgrade the firmware via downgrade package.