Bug 81911
| Summary: | Kernel 3.16 WARNING: CPU drivers/gpu/drm/i915/intel_display.c (slowpath) | ||
|---|---|---|---|
| Product: | Drivers | Reporter: | rocko (rockorequin) |
| Component: | Video(DRI - Intel) | Assignee: | intel-gfx-bugs (intel-gfx-bugs) |
| Status: | RESOLVED CODE_FIX | ||
| Severity: | normal | CC: | intel-gfx-bugs |
| Priority: | P3 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | 3.16 | Subsystem: | |
| Regression: | No | Bisected commit-id: | |
| Attachments: | slowpath warning logs | ||
The PC froze for some seconds today and this was reported in the log. Might it be related? Aug 20 13:36:21 trusty-btrfs kernel: [226268.489553] [drm:ilk_display_irq_handler] *ERROR* Pipe B FIFO underrun Aug 20 13:36:21 trusty-btrfs kernel: [226268.490001] [drm:cpt_set_fifo_underrun_reporting] *ERROR* uncleared pch fifo underrun on pch transcoder B Aug 20 13:36:21 trusty-btrfs kernel: [226268.490002] [drm:cpt_serr_int_handler] *ERROR* PCH transcoder B FIFO underrun Please attach full dmesg from boot to the problem with drm.debug=14 module parameter set. If it's a gpu hang, please attach the error state. Sorry, I only have logs for the last few days and the logs don't contain the slowpath warning. I'm not sure I've seen the issue in the last month of using 3.16. Please also try drm-intel-nightly branch from http://cgit.freedesktop.org/drm-intel. I suspect this might be fixed by commit 9c787942907face82da505c2c5493998b56cfc5a Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Fri Sep 5 07:13:25 2014 +0100 drm/i915: Decouple the stuck pageflip on modeset (In reply to Jani Nikula from comment #4) > Please also try drm-intel-nightly branch from > http://cgit.freedesktop.org/drm-intel. I suspect this might be fixed by > > commit 9c787942907face82da505c2c5493998b56cfc5a > Author: Chris Wilson <chris@chris-wilson.co.uk> > Date: Fri Sep 5 07:13:25 2014 +0100 > > drm/i915: Decouple the stuck pageflip on modeset I no longer remember why I thought that, but it's been released in v3.18. Presumed fixed, closing. Please reopen if the problem persists with current kernels. Thank you. |
Created attachment 145691 [details] slowpath warning logs I got this warning a couple of times to me today on a Dell L502x (Intel Core i7-2630QM) and the PC froze for some time (30 seconds? A minute perhaps?) When it happens, the severity is high because the PC locks up, but so far it has only happened twice since the kernel went stable. Logs attached.