Please change the subject line to
no more caps-lock LED, Ctrl-Alt-F1-F6 nor USB power minutes after boot

This happens at random intervals after a fresh boot -- whenever I have a
USB mouse plugged in during boot -- sometimes after 3 minutes, sometimes
the system works for hours.

If I plug the USB mouse after boot is complete, there is no such
failure: a work-around, if one does not forget to unplug the mouse prior
to booting. Then the Caps-Lock LED and USB devices work, and Ctrl-
Alt-F1-F7 switches screens.

I wrote: "some apps may hang sooner or later"
ps shows that they are in put in "uninterruptible sleep" (flag D), i.e. even 
kill -9 does not manage to kill those processes, and they are not listed as 
zombies.
user     7080  0.4  2.0  30828 21104 ?        D    17:58   0:06 
/usr/bin/emacs22-gtk
root      7218  0.0  0.0   1760   456 pts/2    D+   18:08   0:00 rmmod usbhid

-- 
no more ctrl-alt-F1 + loss of USB power 3 minutes after hibernation
https://bugs.launchpad.net/bugs/299496
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