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.mateo@xxxxxxxxx> 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 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
