[Bug 80948] [sna suse] many black lines with latest ddx

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80948

--- Comment #43 from Jiri Slaby <jirislaby at gmail.com> ---
(In reply to Jiri Slaby from comment #42)
> [   25.013522] Call Trace:
> [   25.013558]  [<ffffffffa05aeb69>] intel_crtc_page_flip+0x309/0x910 [i915]

Oh, and this is the first hunk's path. So calling it from both locations can
trigger this BUG_ON?


BTW
every boot shows:
2015-06-22T11:02:32.086138+02:00 anemoi kernel: [    5.222347]
[drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo
underrun on pch transcoder A
2015-06-22T11:02:32.086138+02:00 anemoi kernel: [    5.222385]
[drm:cpt_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun
2015-06-25T17:48:29.159519+02:00 anemoi kernel: [    5.156922]
[drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo
underrun on pch transcoder A
2015-06-25T17:48:29.159519+02:00 anemoi kernel: [    5.156946]
[drm:cpt_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun
2015-07-02T21:03:33.947421+02:00 anemoi kernel: [183015.139612]
[drm:intel_dp_start_link_train [i915]] *ERROR* failed to enable link training
2015-07-02T21:03:33.947449+02:00 anemoi kernel: [183015.142321]
[drm:intel_dp_complete_link_train [i915]] *ERROR* failed to start channel
equalization
2015-07-06T10:41:47.285360+02:00 anemoi kernel: [    5.006666]
[drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo
underrun on pch transcoder A
2015-07-06T10:41:47.285361+02:00 anemoi kernel: [    5.006713]
[drm:cpt_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun
2015-07-06T12:56:41.992582+02:00 anemoi kernel: [    5.219848]
[drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo
underrun on pch transcoder A
2015-07-06T12:56:41.992582+02:00 anemoi kernel: [    5.219867]
[drm:cpt_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun
2015-07-06T12:59:18.957624+02:00 anemoi kernel: [    5.102770]
[drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo
underrun on pch transcoder A
2015-07-06T12:59:18.957625+02:00 anemoi kernel: [    5.102812]
[drm:cpt_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun

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