Sergiu Sincan, thank you for taking the time to report this bug and helping to
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automatically gather debugging information, in a terminal:
apport-collect 1529020
** Package changed: linux-lts-vivid (Ubuntu) => linux (Ubuntu)
** Changed in: linux (Ubuntu)
Importance: Undecided => Low
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1529020
Title:
Braswell: CPU pipe C FIFO underrun when mouse pointer changes display
Status in linux package in Ubuntu:
Incomplete
Bug description:
Machine is a HP 250 G4 notebook with Celeron N3050, with BIOS F.1A
Rev.A (latest).
When I add a external display (VGA, 1920x1080@60Hz), sometimes when I cross
over to it with the mouse cursor, it flickers (turns off for about 1-2
seconds), and I get:
[ 692.452293] [drm:intel_cpu_fifo_underrun_irq_handler [i915_bpo]] *ERROR*
CPU pipe C FIFO underrun.
It will do this for 2-3 times, and then it will turn off completely (external
display has no VGA signal).
Also reproduces with Kubuntu 15.10 (in Live mode).
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: xserver-xorg-video-intel-lts-vivid 2:2.99.917-1~exp1ubuntu2.2~trusty1
ProcVersionSignature: Ubuntu 3.19.0-42.48~14.04.1-generic 3.19.8-ckt10
Uname: Linux 3.19.0-42-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
CurrentDesktop: KDE
Date: Thu Dec 24 10:03:17 2015
InstallationDate: Installed on 2015-12-23 (0 days ago)
InstallationMedia: Kubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
SourcePackage: xserver-xorg-video-intel-lts-vivid
UpgradeStatus: No upgrade log present (probably fresh install)
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