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dansbarsant

Member

From: br

Registered: 2026-07-19

Posts: 1

Amdgpu freezes after monitor goes to standby: SMU: No response msg_reg

Good morning everyone, I'm having terrible mistakes with amdgpu.

This usually happens after the monitor is on standby.
When he comes back he just doesn't care.
I started monitoring with journaulctl -f, and also specifically with dmesg -w
I tried several kernels, even zen, cachyos, and lts, they all gave the same error.

The log I captured:

jul 19 15:58:25 animal kernel: amdgpu 0000:12:00.0: amdgpu: SMU: I'm not done with you
r previous command: SMN_C2PMSG_66:0x00000029 SMN_C2PMSG_82:0x00000000
jul 19 15:58:25 animal kernel: amdgpu 0000:12:00.0: amdgpu: Failed to disable gfxoff!

jul 19 15:58:30 animal kernel: amdgpu 0000:12:00.0: amdgpu: SMU: I'm not done with you
r previous command: SMN_C2PMSG_66:0x00000029 SMN_C2PMSG_82:0x00000000
jul 19 15:58:30 animal kernel: amdgpu 0000:12:00.0: amdgpu: Failed to disable gfxoff!

jul 19 15:58:31 animal kernel: amdgpu 0000:12:00.0: amdgpu: Dumping IP State
jul 19 15:58:31 animal kernel: snd_hda_intel 0000:12:00.1: Refused to change power state from D0 to D3hot
jul 19 15:58:34 animal kernel: amdgpu 0000:12:00.0: amdgpu: failed to write reg 2890 w
ait reg 28a2
jul 19 15:58:34 animal kernel: amdgpu 0000:12:00.0: amdgpu: SMU: I'm not done with you

sometimes changes:

jul 12 17:53:54 fogueira kernel: amdgpu 0000:12:00.0: SMU: No response msg_reg: 29 resp_reg: 0
jul 12 17:53:54 fogueira kernel: in params:00000000
jul 12 17:53:54 fogueira kernel: amdgpu 0000:12:00.0: Failed to disable gfxoff!

the tip i get:

amdgpu: Overdrive is enabled, please disable it before reporting any bugs unrelated to overdrive.

after a few tries I managed to:

cat /etc/modprobe.d/amdgpu.conf
options amdgpu ppfeaturemask=0xfffd7fff runpm=0

Before this the ppfeaturemask was 0xffffffff

After this workaround im think this work, i guess, I tested it for just two days, and I think the freezing has stopped at least for now.
I was scared to death that it was my video card dying, but I think it was some wrong parameter.

my gpu rx6600xt https://pastes.io/vhFnUZBz

uname -a
Linux animal 6.18.39-1-lts #1 SMP PREEMPT_DYNAMIC Sat, 18 Jul 2026 18:11:01 +0000 x86_64 GNU/Linux

regards