Public bug reported:

Using linux-generic is no problem, but when using linux-lowlatency it
hangs instantly at boot. Starting without quiet and splash kernel
parameters donesn't show any interesting output. Only the purple screen
with the grub echo text, "Loading Linux 3.8.0-31-lowlatency..." and on
the next line a cursor which is totally irresponsive to key pressing.

The computer is a ThinkPad X1 Carbon with Intel i7. I have two other
ThinkPads with Intel i7 where this problem is nonexisting. Maybe there
is some X1 Carbon specific bug/feature that is triggered by the
lowlatency patchset?

lsb_release -rd
Description:    Ubuntu 13.04
Release:        13.04

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: linux-lowlatency 3.8.0.31.19
ProcVersionSignature: Ubuntu 3.8.0-31.46-generic 3.8.13.8
Uname: Linux 3.8.0-31-generic x86_64
ApportVersion: 2.9.2-0ubuntu8.3
Architecture: amd64
Date: Sat Sep 28 11:54:31 2013
InstallationDate: Installed on 2013-09-12 (15 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MarkForUpload: True
SourcePackage: linux-meta-lowlatency
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: linux-lowlatency (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug raring

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https://bugs.launchpad.net/bugs/1232413

Title:
  Lowlatency kernel hangs at boot, even before any text output

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