ureadahead refuses to run even with no existing pack file

[James Brierley]

I noticed that my Quantal desktop was starting slowly, and found that ureadahead was not being started. Attempting to start it manually produced the output:

/var/lib/ureadahead/pack: No such file or directory
Counted 1 CPUs

ureadahead: Error while tracing: No such file or directory

This seems to be a bug since according to the manual page ureadahead is supposed to just generate a new pack file when none exists. Applying --force-trace did not make any difference.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: ureadahead 0.100.0-12build1
Uname: Linux 3.7.0-030700rc5-generic x86_64
ApportVersion: 2.6.1-0ubuntu8
Architecture: amd64
Date: Wed Dec 5 10:26:22 2012
InstallationDate: Installed on 2012-03-08 (271 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120301)
MarkForUpload: True
SourcePackage: ureadahead
UpgradeStatus: Upgraded to quantal on 2012-10-20 (45 days ago)

[James Brierley (jmb8710)]

I have since discovered that this problem relates to running a mainline kernel (to regression test another bug). Reverting to an Ubuntu kernel cured it. Sorry for filing a pointless bug report.