[Bug 577444] [NEW] Kernel lockup at boot in 2.6.32-21 and 2.6.32-22

[Tony Mugan]

Public bug reported:

On a Dell Latitude D400 laptop, kernel 2.6.32-20 worked fine but the two most recent kernel releases cause a hard lockup on boot.
2.6.32-21 and 2.6.32-22 both tested and confirmed to lockup on boot every time at the same point.

I then tried the following two mainline kernels and they work fine.

2.6.33-020633-generic
2.6.34-020634rc6-generic

checkout the /var/log/messages attached to this bug report.
The easiest way to find the points it hangs on is to search for "imklog" which starts every reboot.

An example is as follows (which shows the log file stopping abruptly due
to a hard reset


May  8 08:25:34 simon-laptop kernel: [    0.000000]  modified: 0000000000100000 - 000000001feaa000 (usable)
May  8 08:25:34 simon-laptop kernel: [    0.000000]  modified: 000000001feaa000 - 0000000020000000 (reserved)
May  8 08:25:34 simon-laptop kernel: [    0.000000]  modified: 00000000fecMay  8 08:36:48 simon-laptop kernel: imklog 4.2.0, log source = /proc/kmsg started.
May  8 08:36:48 simon-laptop rsyslogd: [origin software="rsyslogd" swVersion="4.2.0" x-pid="464" x-info="http://www.rsyslog.com"] (re)start

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

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Kernel lockup at boot in 2.6.32-21 and 2.6.32-22
https://bugs.launchpad.net/bugs/577444
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