FIFO underrun error

[Esteban Benitez]

Subunit 18.04 LTS
System will not boot.

I updated graphics drivers I think erroneously, then received the underrun errors and created a swap partition by accident following a fix for a similar error as was having trouble booting crypt. I commented out the swap and turned off swap and have updated my drivers and purged previous. I can access terminal, yet still cannot boot due to the undercut. I think I need to create a .conf file for the graphics drivers.

CPU pipe B FIFO underrun

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: xorg 1:7.7+19ubuntu7
ProcVersionSignature: Ubuntu 4.15.0-10.11-generic 4.15.3
Uname: Linux 4.15.0-10-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
Date: Wed Jul 4 03:45:23 2018
DistUpgraded: Fresh install
DistroCodename: bionic
DistroVariant: ubuntu
EcryptfsInUse: Yes
ExtraDebuggingInterest: I just need to know a workaround
GraphicsCard:
 Intel Corporation 4 Series Chipset Integrated Graphics Controller [8086:2e12] (rev 03) (prog-if 00 [VGA controller])
   Subsystem: Lenovo ThinkCentre M6258 [17aa:3048]
   Subsystem: Lenovo 4 Series Chipset Integrated Graphics Controller [17aa:3048]
InstallationDate: Installed on 2018-01-25 (160 days ago)
InstallationMedia: It
MachineType: LENOVO 7220RY8
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-10-generic root=/dev/mapper/it--vg-root ro quiet splash
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/07/2012
dmi.bios.vendor: LENOVO
dmi.bios.version: 5CKT77AUS
dmi.board.name: LENOVO
dmi.board.vendor: LENOVO
dmi.board.version: NONE
dmi.chassis.asset.tag: ������������������������
dmi.chassis.type: 3
dmi.chassis.vendor: LENOVO
dmi.chassis.version: NONE
dmi.modalias: dmi:bvnLENOVO:bvr5CKT77AUS:bd05/07/2012:svnLENOVO:pn7220RY8:pvrThinkCentreM58p:rvnLENOVO:rnLENOVO:rvrNONE:cvnLENOVO:ct3:cvrNONE:
dmi.product.family: NONE
dmi.product.name: 7220RY8
dmi.product.version: ThinkCentre M58p
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.13.1+18.04.20180302-0ubuntu1
version.libdrm2: libdrm2 2.4.92+git1806210630.7164ab~oibaf~b
version.libgl1-mesa-dri: libgl1-mesa-dri 18.2~git1807040730.45f9d5~oibaf~b
version.libgl1-mesa-glx: libgl1-mesa-glx 18.2~git1807040730.45f9d5~oibaf~b
version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.5-1ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2
xserver.bootTime: Wed Jul 4 03:33:45 2018
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.19.6-1ubuntu4
xserver.video_driver: modeset

[Daniel van Vugt (vanvugt)]

It sounds like you're referring to:

[ 22.774658] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun
[ 23.870619] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun
[ 24.280905] e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx
[ 24.281048] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 25.216644] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun
[ 26.474633] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun
[ 27.720650] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun

So this would be a kernel bug. However in my experience such kernel errors are also not fatal and won't cause permanent graphics problems.

Looking at your CPU model however:
  Core(TM)2 Duo CPU E8500
I can tell you are experiencing bug 1727356, which is not related to kernel errors at all.