Comment 9 for bug 139443

Hi,

I'm getting the same symptoms pretty regularly. I can't actively reproduce it, but probably 1/2 to 1/4 of the times I use my computer it locks up.

You can see I'm getting the LPIB message here:
cat messages | grep LPIB
Jul 7 20:58:29 squelch kernel: [ 73.830973] hda-intel: Invalid position buffer, using LPIB read method instead.
Jul 7 21:11:50 squelch kernel: [ 69.076738] hda-intel: Invalid position buffer, using LPIB read method instead.

Here's what I did last time it happened (30 minutes ago).

1) I booted and left the computer on for about 20 minutes at the login screen while I was doing other stuff
2) I logged in and started Firefox
3) Firefox froze after opening three tabs. I closed it and tried to open it, but it wouldn't open. I tried to open a terminal, but the terminal wouldn't open. I could open Gnome Calculator though.
4) I switched to a VT and logged in. I could use command line programs just fine.
5) I noticed that there was still a firefox process.
6) I did 'killall firefox', it didn't kill it
7) I did 'killall -9 firefox', it didn't kill it
8) I got the PID and did 'sudo kill -9 $PIDHERE'. The process hung.
9) On other VTs I soon discovered that any sudo command wouldn't work

I used ALT-SYSRQ+R-E-I-S-U-B to reboot the computer since I couldn't use sudo shutdown, or the GUI button.

In the past the computer has frozen when I wasn't by it, and when I would come back it would be totally locked up and the fan would be at top speed.

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I'd be happy to provide any information developers might find useful. I'm on Ubuntu 8.04 on an AMD 32 bit machine with 2G of RAM.