Public bug reported:
Twice today my machine has locked up in the same way and in the same
circumstances. In both cases it started with Firefox freezing. At this
point I could still switch between windows move windows around the
desktop. However when I clicked the X in the corner to close the Firefox
window, the desktop became completely unresponsive. I could still move
the mouse pointer around, but I couldn't click on anything.
I could also switch to another virtual console using ctrl-alt-F1 etc. In
the virtual console I could type my name at the prompt and press enter,
but apart from the cursor moving down a line, nothing would happen.
After a while I got 9 or so messages on the console of the form "INFO:
task mount.ntfs:2725 blocked for more than 120 seconds", followed by
""echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message". The other messages related to: firefox, Socket Thread, DNS
Res~ver (3 times), cron, xfwm4 and getty.
Apart from these messages nothing else changed for the several minutes
until I forced a shutdown. I could return the console cursor to the next
line, I could switch between terminals and I could move the mouse
pointer about, but I couldn't do anything else.
In case it is relevant, the NTFS activity that was fairly heavy, it
being a system backup to external disk using Deja Dup.
ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: linux-image-lowlatency 3.8.0.27.15
ProcVersionSignature: Ubuntu 3.8.0-27.19-lowlatency 3.8.13.4
Uname: Linux 3.8.0-27-lowlatency i686
ApportVersion: 2.9.2-0ubuntu8.3
Architecture: i386
Date: Mon Aug 12 13:25:06 2013
EcryptfsInUse: Yes
InstallationDate: Installed on 2013-08-05 (6 days ago)
InstallationMedia: Ubuntu-Studio 13.04 "Raring Ringtail" - Release i386
(20130424)
MarkForUpload: True
SourcePackage: linux-meta-lowlatency
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: linux-meta-lowlatency (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386 raring
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https://bugs.launchpad.net/bugs/1211283
Title:
Application freeze escalates until whole system locks up
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