Last weekend I installed Ubuntu 6.06 on this 770E. I can tell you how I
dealt with the fan. This was worked out a year or so ago on a Vector
installation which also would not start the fan.

1. force acpi on by editing "acpi=force" to the end of the kernel line in 
/boot/grub/menu.lst.
  My kernel line looks like:     
kernel          /boot/vmlinuz-2.6.15-29-386 root=/dev/hda2 ro acpi=force
I took out the "quiet splash" parameters so I could watch what's going on at 
boot time.  Beware of automatic system updates rewriting the menu.lst file and 
erasing your change.

2. Add the line "echo 0 > /proc/acpi/fan/FN00/state" to the end of 
/etc/rc.local file.
Reboot and the fan will be running continuously but at a almost inaudible slow 
speed.  It starts up about time the desktop is loaded.  Crude fix but good 
enough for me.

BTW I also have a 770Z and the fan works automatically on it.

Now if I could only get the sound to work.....

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CPU fans won't start for Thinkpad 770E and 390E
https://bugs.launchpad.net/bugs/70739
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