1. Please describe the problem: Sudden system slowdown and the following shown in the journal. kernel amdgpu drm ERROR dc_dmub_srv_log_diagnostic_data DMCUB error collecting diagnostic data 2. What is the Version-Release number of the kernel: 6.10.9-200.fc40.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, haven't seen this one before. 4. Can you reproduce this issue? If so, please provide the steps to reproduce the issue below: So far only got it once. 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``: Not yet at least. 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. Please find full journal attached. Reproducible: Always
Created attachment 2046891 [details] journalctl -b -1 --no-hostname > 2024.09.14-amdgpu-crash.log Issue started at. Sep 14 15:52:48 kernel: amdgpu 0000:c1:00.0: [drm] *ERROR* dc_dmub_srv_log_diagnostic_data: DMCUB error - collecting diagnostic data
I'm experiencing the same "DMCUB error" described in this bug report, but with some key differences that might indicate a variant or separate issue: * Kernel Version: I'm running kernel 6.11.5-200.fc40.x86_64, which is newer than the 6.10.9-200.fc40.x86_64 mentioned in the original report. * Graphics Card: I have an AMD Ryzen 7 PRO 7840HS with Radeon 780M Graphics. It would be helpful to know the specific graphics card used in the original report for comparison. * Consistent Reproduction: I can reproduce this error consistently, whereas the original report mentioned it occurring only once. * Thunderbolt: I'm encountering this issue when connecting an external display via a Thunderbolt dock. This might be a contributing factor. I've attached my full dmesg output to this bug for comparison. Please review the logs and let me know if you need any further information or if you would like me to file a separate bug report.
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