Hi, my laptop which has ubuntu (upgraded xubuntu) 8.04 running hangs (screen black, no disk activity etc.) every night when I'm using an external monitor. I have tested to switch off all power saving functions, but still the same. The lockup does not occur when using only the laptop display. Currently I'm using intel experimental drivers, my card is an intel 845x integrated. The machine hangs both in gnome and xfce. Yesterday night I logged onto ssh from another machine to watch cat /var/log/syslog but I didn't see anything special there, where should I look to find the problem?
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