| Summary: | [BAT][PNV] pipe [AB] vblank wait timed out when running igt@kms_pipe_crc_basic@hang-read-crc-pipe-a/b | ||
|---|---|---|---|
| Product: | DRI | Reporter: | Martin Peres <martin.peres> |
| Component: | DRM/Intel | Assignee: | Maarten Lankhorst <bugs> |
| Status: | CLOSED FIXED | QA Contact: | Intel GFX Bugs mailing list <intel-gfx-bugs> |
| Severity: | critical | ||
| Priority: | high | CC: | intel-gfx-bugs |
| Version: | DRI git | ||
| Hardware: | Other | ||
| OS: | All | ||
| Whiteboard: | ReadyForDev | ||
| i915 platform: | PNV | i915 features: | display/Other |
|
Description
Martin Peres
2017-06-26 12:33:09 UTC
Adding tag into "Whiteboard" field - ReadyForDev *Status is correct *Platform is included *Feature is included *Priority and Severity correctly set *Logs included This bug only affects fi-pnv-d510, the one in farm 2 is unaffected. I'm not sure when this was broken or if it was always broken, but the code needs to disable CXSR during atomic modeset enable. When cxsr is active you get no vblanks, which means you end up with this. It will be fixed when converting the gen4- watermarks to atomic, the code properly disables cxsr there. I've tested this bug and on nightly I hit it all the time, while with atomic watermarks it's gone. (In reply to Maarten Lankhorst from comment #2) > This bug only affects fi-pnv-d510, the one in farm 2 is unaffected. > > I'm not sure when this was broken or if it was always broken, but the code > needs to disable CXSR during atomic modeset enable. When cxsr is active you > get no vblanks, which means you end up with this. > > It will be fixed when converting the gen4- watermarks to atomic, the code > properly disables cxsr there. I've tested this bug and on nightly I hit it > all the time, while with atomic watermarks it's gone. 121 runs without failures, this seems to be fixed. |
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