[Bug 111838] New: [DRM-INTEL] linux kernel dmesg-warn CPU pipe A FIFO underrun

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111838

            Bug ID: 111838
           Summary: [DRM-INTEL] linux kernel dmesg-warn CPU pipe A FIFO
                    underrun
           Product: DRI
           Version: unspecified
          Hardware: x86 (IA32)
                OS: Linux (All)
            Status: NEW
          Severity: minor
          Priority: not set
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: atzlinux at yeah.net
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 145542
  --> https://bugs.freedesktop.org/attachment.cgi?id=145542&action=edit
dmesg

On computer boot,the linux kernel dmesg has the following error info:

[    4.477187] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe A FIFO underrun
[    4.477272] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR* pipe
B underrun
[    4.477348] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe B FIFO underrun
[    4.477187] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe A FIFO underrun
[    4.477272] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR* pipe
B underrun
[    4.477348] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe B FIFO underrun

I had report this bug on Debian:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=941197

-- system architecture: ("uname -m")  i686
-- kernel version: ("uname -r") 4.19.0-6-686
4.19.0-6-686 #1 SMP Debian 4.19.67-2+deb10u1 (2019-09-20) i686 GNU/Linux

-- Linux distribution:Debian 10.1 
-- Machine or mother board model:

dmidecode info about machine type:

BIOS Information
        Vendor: Phoenix Technologies LTD
        Version: R0042G9
        Release Date: 01/19/2005

System Information
        Manufacturer: Sony Corporation
        Product Name: VGN-B99C
        Version: C2004ZYP
        Serial Number: 28194290-9106065
        UUID: e7fb2880-4b65-11c6-8c2a-00014a075a9a

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