Ah no, I was to quick to judge. Now the error occurred with 4.5rc5, but it is less frequent. And the quality of the glitches change. No more repetition errors, just "regular" graphic errors.
$ dmesg | grep i915 [ 2.513449] i915: unknown parameter 'lvds_downclock' ignored [ 2.743658] [drm] Initialized i915 1.6.0 20151218 for 0000:00:02.0 on minor 0 [ 4.275935] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device [ 5.396543] snd_hda_intel 0000:00:1b.0: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915]) [ 1027.095396] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun [ 1027.095477] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder A [ 1027.095530] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun ** Tags removed: kernel-fixed-upstream kernel-fixed-upstream-4.5-rc5 ** Tags added: kernel-bug-exists-upstream kernel-bug-exists-upstream-4.5-rc5 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1550779 Title: [i915]] *ERROR* CPU pipe A FIFO underrun - Xorg glitches To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
