Created attachment 145542 [details] 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
Created attachment 145543 [details] lspci
Created attachment 145544 [details] dmidecode
(In reply to xiao sheng wen from comment #0) > Created attachment 145542 [details] > dmesg Please add drm.debug=14 module parameter, and do this again. Is this reproducible on newer kernels? v5.3 or drm-tip branch of https://cgit.freedesktop.org/drm/drm-tip
Created attachment 145546 [details] the dmesg of add drm.debug=14 module parameter the dmesg of add drm.debug=14 module parameter is upload. please see this new dmesg file first. If need,I'll compile the newest kernel to test.
Created attachment 145561 [details] the 5.3.0 kernel debug dmesg It is reproducible on newer kernels. I use drm-tip branch of https://cgit.freedesktop.org/drm/drm-tip to compile the newest kernel to boot computer,the error info also exist. The details info ,please see this attachment(add drm.debug=14 module parameter already).
> I use drm-tip branch of https://cgit.freedesktop.org/drm/drm-tip to compile > the newest kernel to boot computer,the error info also exist. > Can you please attach dmesg from drmtip? Which platform is this? I couldn't find it from the dmseg? As a user, what is the impact of this issue other than the errors in the logs?
(In reply to Lakshmi from comment #6) > > I use drm-tip branch of https://cgit.freedesktop.org/drm/drm-tip to compile > > the newest kernel to boot computer,the error info also exist. > > > Can you please attach dmesg from drmtip? Which platform is this? I couldn't > find it from the dmseg? > As a user, what is the impact of this issue other than the errors in the > logs? https://bugs.freedesktop.org/attachment.cgi?id=145561 ,this is dmesg from drmtip . The OS is Debian 10.1 32bit. Only errors in the logs,No other impact for me.
(In reply to xiao sheng wen from comment #7) > > (In reply to Lakshmi from comment #6) > > > I use drm-tip branch of https://cgit.freedesktop.org/drm/drm-tip to compile > > > the newest kernel to boot computer,the error info also exist. > > > > > Can you please attach dmesg from drmtip? Which platform is this? I couldn't > > find it from the dmseg? > > As a user, what is the impact of this issue other than the errors in the > > logs? > > https://bugs.freedesktop.org/attachment.cgi?id=145561 ,this is dmesg from > drmtip . > > The OS is Debian 10.1 32bit. > > Only errors in the logs,No other impact for me. Current drmtip version is 5.4-rc1+ and attached dmesg is from 5.3. Can you please verify with (https://cgit.freedesktop.org/drm-tip)? Which platform is this?
(In reply to Lakshmi from comment #8) > > > > https://bugs.freedesktop.org/attachment.cgi?id=145561 ,this is dmesg from > > drmtip . > > > > The OS is Debian 10.1 32bit. > > > > Only errors in the logs,No other impact for me. > > Current drmtip version is 5.4-rc1+ and attached dmesg is from 5.3. Can you > please verify with (https://cgit.freedesktop.org/drm-tip)? > Which platform is this? I clone this drm-tip git version to compile kernel. commit e8ad7c465ad3be7dd16d8629b03165e06ed7acda Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Fri Sep 27 13:06:16 2019 +0100 drm-tip: 2019y-09m-27d-12h-05m-14s UTC integration manifest git remote -vvv origin https://anongit.freedesktop.org/git/drm-tip.git/ (fetch) origin https://anongit.freedesktop.org/git/drm-tip.git/ (push) My OS is Debian 10.1 ,i386. I use make bindeb-pkg to Kernel packaging. In drm-tip/debian/control file,kernel version is 5.3.0 . At final,I get the following files: -rw-r--r-- 1 root root 4373 9月 28 07:23 linux-5.3.0_5.3.0-1_i386.buildinfo -rw-r--r-- 1 root root 1718 9月 28 07:23 linux-5.3.0_5.3.0-1_i386.changes -rw-r--r-- 1 root root 11277144 9月 28 07:18 linux-headers-5.3.0_5.3.0-1_i386.deb -rw-r--r-- 1 root root 41130092 9月 28 07:23 linux-image-5.3.0_5.3.0-1_i386.deb -rw-r--r-- 1 root root 1061044 9月 28 07:18 linux-libc-dev_5.3.0-1_i386.deb so,the kernel version 5.3.0 is right for drm-tip packageing by .deb.The source code is newest,don't worry please.
Xiao, what's the platform under use here? Strangely, I couldn't find that info from the dmesg.
(In reply to Lakshmi from comment #10) > Xiao, what's the platform under use here? Strangely, I couldn't find that > info from the dmesg. What's the meaning about the word "platform"? Is OS or hardware ? OS: -- system architecture: ("uname -m") i686 -- Linux distribution:Debian 10.1 -- Machine or mother board model: Hardware: 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
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