Another regression for Jairo to track. -Daniel On Thu, Sep 24, 2015 at 05:22:09PM -0400, Nick Bowler wrote: > Hi, > > Testing out 4.3-rc2, first thing I notice is that the VGA output is > not working. Specifically, the display is continuously powering on > and off -- at no point is any image visible on the screen (I am expecting > to see the console output). The display connected to the HDMI output is > working fine. > > Linux 4.2 did not suffer from this problem. > > In dmesg I see the following messages, which I do not see on a working > kernel. Full dmesg from 4.3-rc2 is attached (gzipped). > > [ 0.115339] [drm:drm_calc_timestamping_constants] *ERROR* crtc > 21: Can't calculate constants, dotclock = 0! > [ 0.117582] [drm:intel_opregion_init] *ERROR* No ACPI video bus found > > This is an older machine with Intel G45 graphics. > > Unfortunately bisection is proving difficult, because the commits it > wants me to test have a different problem: neither display comes up at > all (both remain in standby). Partial results follow. > > Thanks, > Nick > > git bisect start 'drivers/gpu/drm/i915' > # bad: [1f93e4a96c9109378204c147b3eec0d0e8100fde] Linux 4.3-rc2 > git bisect bad 1f93e4a96c9109378204c147b3eec0d0e8100fde > # good: [64291f7db5bd8150a74ad2036f1037e6a0428df2] Linux 4.2 > git bisect good 64291f7db5bd8150a74ad2036f1037e6a0428df2 > # skip: [a7a6c498927ea42c9a3b26e0caa5c854a980d58c] drm/i915: > POSTING_READ() in intel_set_memory_cxsr() > git bisect skip a7a6c498927ea42c9a3b26e0caa5c854a980d58c > # skip: [031b698a77a70a6c394568034437b5486a44e868] drm/i915: > Unconditionally do fb tracking invalidate in set_domain > git bisect skip 031b698a77a70a6c394568034437b5486a44e868 > # skip: [adeca76d8e2b34b5c739a36f4191aed63080da40] drm/i915: > Simplify i915_gem_execbuffer_retire_commands() parameters > git bisect skip adeca76d8e2b34b5c739a36f4191aed63080da40 > # good: [369712e89404089fa559235bb1ee8fc40d976e6b] drm/i915: reduce > duplicate conditions in i9xx_hpd_irq_handler > git bisect good 369712e89404089fa559235bb1ee8fc40d976e6b > # skip: [6eb1a6817246f1a67de4d6959a84d09efead5329] drm/i915: Read wm > values from hardware at init on CHV > git bisect skip 6eb1a6817246f1a67de4d6959a84d09efead5329 > # bad: [d14e7b6d1d8747826cb900db852351c550e00fdd] drm/i915: Check DP > link status on long hpd too > git bisect bad d14e7b6d1d8747826cb900db852351c550e00fdd > # skip: [fe36f55d4d4447679923fc74564786ae423ca4bd] drm/i915/gtt: > Cleanup page directory encoding > git bisect skip fe36f55d4d4447679923fc74564786ae423ca4bd > _______________________________________________ > dri-devel mailing list > dri-devel@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/dri-devel -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
