On Wed, Aug 8, 2012 at 6:50 AM, Mihai Moldovan <io...@ionic.de> wrote: > Hi Daniel, hi list > > ever since version 3.2.0 (maybe even earlier, but 3.0.2 is still working > fine), > my box is crashing when loading the i915 driver (mode-setting enabled.) > > The current version I'm testing with is 3.5.0. > > I was able to get the BUG output (please forgive any errors/flips in the > output, > I have had to transcribe the messages from the screen/images), however, I'm > not > able to find out what's wrong. > > If I see it correctly, there's a null pointer dereference in a printk called > from inside gmbus_xfer. The only printk calls I can see in > drivers/gpu/drm/i915/intel_i2c.c gmbus_xfer() however are issued by the > DRM_DEBUG_KMS() and DRM_INFO() macros. > Neither call looks wrong to me, I even tried to swap adapter->name with > bus->adapter.name and make *sure* i < num is true, but haven't had any > success. > > I'd really like to see this bug fixed, as it's preventing me from updating the > kernel for over a year now. > > Also, while 3.0.2 works, it *does* spew error/warning messages related to > gmbus > and I've had corrupted VTs in the past (albeit after a long uptime with > multiple > X restarting and DVI cable unplugging/reattaching events), so maybe there's a > lot more broken than "expected".
Hm, this is rather strange. gmbus should not be enable on 3.2 nor 3.0, since exactly this issue might happen. We've re-enabled gmbus again on 3.5 after having fixed this bug. Are you sure that this is plain 3.2 you're running? Yours, Daniel -- Daniel Vetter daniel.vet...@ffwll.ch - +41 (0) 79 365 57 48 - http://blog.ffwll.ch -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
