You have been subscribed to a public bug:
In the first two weeks of owning a Broadwell T550, I have suffered about
two dozen abrupt power-offs. This has happened:
a) While resuming from suspend.
b) While in normal operation and just moving the mouse.
c) While switching from X to console by pressing ctrl-alt-F1.
There was no kernel panic, no log files, just an abrupt power-off.
In conjunction with several other HD5500 issues, I am starting to
suspect the intel video driver, and have switched to the modesetting
driver. Setting the Intel driver to use AccelMethod: none made the
system more reliable but did not eliminate crashes.
Workaround: Put the following in /etc/X11/xorg.conf:
Section "Device"
Identifier "intel"
Driver "modesetting"
EndSection
ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2build1
ProcVersionSignature: Ubuntu 3.19.0-9.9-generic 3.19.1
Uname: Linux 3.19.0-9-generic x86_64
ApportVersion: 2.16.2-0ubuntu4
Architecture: amd64
CurrentDesktop: XFCE
Date: Sun Mar 22 13:23:01 2015
InstallationDate: Installed on 2015-03-05 (17 days ago)
InstallationMedia: Xubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64
(20150218.1)
SourcePackage: xserver-xorg-video-intel
UpgradeStatus: Upgraded to vivid on 2015-03-19 (3 days ago)
** Affects: xorg (Ubuntu)
Importance: Low
Status: Incomplete
** Tags: amd64 apport-bug vivid
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Thinkpad T550: Broadwell with Intel HD5500 powers off randomly
https://bugs.launchpad.net/bugs/1435070
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