Bug 1219826
| Summary: | VT is unusable on i915 | ||||||||
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| Product: | [Fedora] Fedora | Reporter: | Neal Becker <ndbecker2> | ||||||
| Component: | xorg-x11-drv-intel | Assignee: | Adam Jackson <ajax> | ||||||
| Status: | CLOSED EOL | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | ||||||
| Severity: | urgent | Docs Contact: | |||||||
| Priority: | unspecified | ||||||||
| Version: | 22 | CC: | ajax, awilliam, gansalmon, itamar, jonathan, kernel-maint, madhu.chinakonda, mchehab, mhayden, samuel-rhbugs, satellitgo, xgl-maint | ||||||
| Target Milestone: | --- | ||||||||
| Target Release: | --- | ||||||||
| Hardware: | x86_64 | ||||||||
| OS: | Unspecified | ||||||||
| Whiteboard: | |||||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||||
| Doc Text: | Story Points: | --- | |||||||
| Clone Of: | Environment: | ||||||||
| Last Closed: | 2016-07-19 18:52:29 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: |
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It would be good if you could reproduce it with 'drm.debug=14' as a kernel parameter and attach the journalctl log from that - thanks! Created attachment 1024021 [details]
log
OK, this should be with drm.debug=14. At least, I checked /proc/cmdline and saw it there.
Huh, still not much in there. I don't think I have any more ideas, it's up to ajax :/ The 1 thing is the buffer underrun - but it's not clear if this is the cause or effect. The odd thing is I'd usually expect that kind of error to be accompanied by more data when booted with drm.debug=14 , but it seems like it wasn't... Just updated F21 machine to 4.0.4-202.fc21.x86_64 Now it suffers from the same problem as when I tested F22 using live usb. I did notice this message on boot - BEFORE I tried the vt and activated the error, don't know if it's relevant: Jun 2 03:42:04 nbecker2 kernel: i915 0000:00:02.0: fb0: inteldrmfb frame buffer device Jun 2 03:42:04 nbecker2 kernel: i915 0000:00:02.0: registered panic notifier Jun 2 03:42:04 nbecker2 kernel: [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)! This *might* be related to another bug: https://bugzilla.kernel.org/show_bug.cgi?id=95741 I'm seeing this issue on a third gen X1 Carbon and Dell XPS 13 9343 (2015 model). I haven't tried the i915.enable_ips=0 fix yet. Also 3rd gen X1 carbon here (2015). I just tried i915.enable_ips=0 and it DOES fix the problem. https://bugzilla.kernel.org/show_bug.cgi?id=95741 Fedora 22 changed to end-of-life (EOL) status on 2016-07-19. Fedora 22 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed. |
Created attachment 1023458 [details] log Description of problem: Testing f22-kde-tc2 live usb When switched to VT (alt-ctrl-F2), primary screen starts flashing and is unusable. Fortunately, I have a 2nd screen which is OK. Switching back to graphic mode, primary screen remains unusable. It is still flashing and tearing. Booting with drm.debug=14, I captured journalctl log output. On the VT on the 2nd screen, I saw: drm: intel_cpu_fifo_underrun_irq_handler [i915] *ERROR* CPU pipe A FIFO underrun After this, the log shows various segfaults from kde components. Version-Release number of selected component (if applicable): How reproducible: Steps to Reproduce: 1. 2. 3. Actual results: Expected results: Additional info: