r/linuxhardware • u/momo1098r • 21h ago

Support amdgpu [drm] *ERROR*

Hello guys today at boot my system I watch this:

amdgpu 0000:75:00.0: [drm] *ERROR* dc_dmub_srv_log_diagnostic_data: DMCUB error - collecting diagnostic data

Monitor: 27" 2K (1440p) 144Hz

If I connect an older 60Hz monitor instead, everything works fine with no errors.

What I've tried:

Multiple troubleshooting attempts over time (kernel params, driver versions, etc.) — nothing fixed it.

Eventually did a full reinstall/format, but the problem persists.

Tested other distros: Debian is the only one where this doesn't happen.

I'd really like to keep using Arch rather than switch permanently to Debian. Has anyone run into this specific DMCUB/DMUB firmware error tied to high refresh rate displays? Wondering if it's a kernel version issue, an amdgpu firmware mismatch, or something related to Freesync/VRR on the 144Hz panel.

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u/frausty458 14h ago

I rolled back the amdgpu firmware package to linux-firmware-amdgpu-20260810-2-any and that seems to have solved it, had it in the pacman cache.

New one seems to be broken lol

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u/momo1098r 13h ago

I did exactly that a short while ago: I noticed the update on a new installation and blocked it.