On Sat, 10 Oct 2015, Darren Hart <dvh...@infradead.org> wrote: > The Debian 3.16.0 kernel does not emit the error, but I have not attempted a > bisection. > > The warning was added by: > 38cc46d drm/i915/bdw: Ack interrupts before handling them (GEN8) > 2014-06-18 (1 year, 4 months ago), Oscar Mateo <oscar.ma...@intel.com>
But we don't start hitting the warning right away with that commit, do we? There's a bug about this with a bisected bad commit [1], please let's track this there. Thanks, Jani. [1] https://bugs.freedesktop.org/show_bug.cgi?id=92084 > > Follows: v3.15-rc8 > Preceedes: 3.17-rc1 > > This is not present in v3.16, so perhaps not present in the Debian kernel and > this is not a regression, but just reporting the condition as intended. > > Linux Version: v4.3-rc4 > Platform: Lenovo ThinkPad Yoga 12 > OS: Debian 8.2 > > $ dmesg | grep -i drm > [ 10.918367] [drm] Initialized drm 1.1.0 20060810 > [ 11.235005] [drm] Memory usable by graphics device = 4096M > [ 11.235009] fb: switching to inteldrmfb from simple > [ 11.235093] [drm] Replacing VGA console driver > [ 11.241160] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). > [ 11.241162] [drm] Driver supports precise vblank timestamp query. > [ 11.256249] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: > Can't calculate constants, dotclock = 0! > [ 11.326946] [drm] GMBUS [i915 gmbus dpb] timed out, falling back to bit > banging on pin 5 > [ 11.344097] [drm] Initialized i915 1.6.0 20150731 for 0000:00:02.0 on > minor 0 > [ 11.344913] fbcon: inteldrmfb (fb0) is primary device > [ 12.462509] [drm:gen8_irq_handler [i915]] *ERROR* The master control > interrupt lied (SDE)! > [ 12.466498] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device > [ 12.794359] [drm:gen8_irq_handler [i915]] *ERROR* The master control > interrupt lied (SDE)! > [ 13.869733] [drm:gen8_irq_handler [i915]] *ERROR* The master control > interrupt lied (SDE)! > [ 13.869894] [drm:gen8_irq_handler [i915]] *ERROR* The master control > interrupt lied (SDE)! > [ 13.870058] [drm:gen8_irq_handler [i915]] *ERROR* The master control > interrupt lied (SDE)! > [ 22.656986] [drm:gen8_irq_handler [i915]] *ERROR* The master control > interrupt lied (SDE)! > [ 257.506246] [drm:gen8_irq_handler [i915]] *ERROR* The master control > interrupt lied (SDE)! > [ 257.506415] [drm:gen8_irq_handler [i915]] *ERROR* The master control > interrupt lied (SDE)! > [ 257.506584] [drm:gen8_irq_handler [i915]] *ERROR* The master control > interrupt lied (SDE)! > [ 257.506746] [drm:gen8_irq_handler [i915]] *ERROR* The master control > interrupt lied (SDE)! > [ 278.722570] [drm:gen8_irq_handler [i915]] *ERROR* The master control > interrupt lied (SDE)! > [ 278.722744] [drm:gen8_irq_handler [i915]] *ERROR* The master control > interrupt lied (SDE)! > [ 278.722908] [drm:gen8_irq_handler [i915]] *ERROR* The master control > interrupt lied (SDE)! > [ 1857.776390] [drm:gen8_irq_handler [i915]] *ERROR* The master control > interrupt lied (SDE)! > [ 1857.776549] [drm:gen8_irq_handler [i915]] *ERROR* The master control > interrupt lied (SDE)! > [ 1857.776710] [drm:gen8_irq_handler [i915]] *ERROR* The master control > interrupt lied (SDE)! > [ 4057.592685] [drm:gen8_irq_handler [i915]] *ERROR* The master control > interrupt lied (SDE)! > > -- > Darren Hart > Intel Open Source Technology Center -- Jani Nikula, Intel Open Source Technology Center -- 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/
