Comment 5 for bug 86099

I did a minimal test by booting into single user/recovery mode with init=/bin/sh on the command line . By nobbling /etc/default/acpi-support and rerunning update-initramfs -u I was able to reduce the loaded modules to the following:
Module Size Used by
thermal 15624 0
processor 31560 1 thermal
fan 6020 0
fbcon 41504 0
tileblit 3840 1 fbcon
font 9344 1 fbcon
bitblit 7168 1 fbcon
softcursor 3328 1 bitblit
vesafb 9244 0
capability 5896 0
commoncap 8704 1 capability
ide_generic 2432 0
ide_disk 18560 3
ext3 142856 1
jbd 62228 1 ext3

A few modprobe -rs removed in that list down to this:
ide_disk 18560 3
ext3 142856 1
jbd 62228 1 ext3

and the problem still occurred.