Bug 1467037
| Summary: | Kernel module crash (amdgpu) on attempting to unbind AMD graphics in kernel 4.11 (regression from 4.10) | ||||||
|---|---|---|---|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | York Possemiers <ypossem> | ||||
| Component: | xorg-x11-drv-ati | Assignee: | X/OpenGL Maintenance List <xgl-maint> | ||||
| Status: | CLOSED CURRENTRELEASE | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | ||||
| Severity: | medium | Docs Contact: | |||||
| Priority: | unspecified | ||||||
| Version: | 25 | CC: | gansalmon, ichavero, itamar, jonathan, kernel-maint, labbott, madhu.chinakonda, mchehab, xgl-maint | ||||
| Target Milestone: | --- | ||||||
| Target Release: | --- | ||||||
| Hardware: | x86_64 | ||||||
| OS: | Unspecified | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2017-08-27 07:13:33 UTC | Type: | Bug | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
| Attachments: |
|
||||||
Bug persists in 4.11.12 Bug seems absent from kernel-4.12.8-200.fc25.x86_64 |
Created attachment 1293572 [details] Journalctl -b -1 of the event Description of problem: With the released of the 4.11 series kernels into the Fedora updates system, I have no longer been able to remove the binding of my graphics card in order to have it participate in pci passthrough. The last working kernel for this was 4.10.17-200.fc25.x86_64. This bug is highly consistent. In order to do the unbinding, I use the following script, executed via SSH #!/bin/bash echo `date "+%H:%M:%S.%N"`"Leaving graphical mode" time systemctl isolate multi-user.target sleep 5 echo `date "+%H:%M:%S.%N"`"removing graphics binding" time echo "0000:01:00.0" > /sys/bus/pci/drivers/amdgpu/unbind sleep 5 echo `date "+%H:%M:%S.%N"`"Removing amdgpu module" time modprobe -r amdgpu sleep 5 echo `date "+%H:%M:%S.%N"`"Done" Here is the latest attempt I've had using the 4.11.7-200.fc25.x86_64 kernel: 14:39:52.408096500Leaving graphical mode real 0m0.253s user 0m0.005s sys 0m0.008s 14:39:57.666116884removing graphics binding Segmentation fault Remote interactions with the computer are still possible, however rebinding doesn't seem to work, and shutdown/reboots do not complete. The timestamps of the above and the attached output of journalctl do match.