[DRM-INTEL] linux kernel dmesg-warn CPU pipe A FIFO underrun

Submitted by xiao sheng wen

Assigned to Intel GFX Bugs mailing list

Link to original bug (#111838)

Description

Created attachment 145542
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 (moved) 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

Attachment 145542, "dmesg":
dmesg