[Bug 102819] New: [drm:intel_set_cpu_fifo_underrun_reporting] *ERROR* uncleared fifo underrun on pipe A

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=102819

            Bug ID: 102819
           Summary: [drm:intel_set_cpu_fifo_underrun_reporting] *ERROR*
                    uncleared fifo underrun on pipe A
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: rion4ik at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 134291
  --> https://bugs.freedesktop.org/attachment.cgi?id=134291&action=edit
kernel config

I see next strange messages in dmesg

[   61.403120] [drm:intel_set_cpu_fifo_underrun_reporting] *ERROR* uncleared
fifo underrun on pipe A
[   61.403127] [drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe A
FIFO underrun
[   61.403148] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder A
[   61.403151] [drm:intel_pch_fifo_underrun_irq_handler] *ERROR* PCH transcoder
A FIFO underrun

Gentoo on Clevo P170EM with hybdrid graphics

$ sudo lspci | grep -i vga
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor
Graphics Controller (rev 09)
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Wimbledon XT [Radeon HD 7970M]

Linux dizzynb 4.13.2-gentoo #1 SMP Sun Sep 17 13:47:20 +05 2017 x86_64 Intel(R)
Core(TM) i7-3610QM CPU @ 2.30GHz GenuineIntel GNU/Linux
x11-base/xorg-server-1.19.3
x11-drivers/xf86-video-ati-7.10.0
media-libs/mesa-17.2.0

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