I have an old Thinkpad T21 that starts to wake from sleep but never makes it that far. I’d like to find out why and maybe even try to fix the problem.

Any hints would be welcome.

1) The monitor doesn’t immediately come back on when you return from sleep.
2) There is not a single pin on the entire laptop which is easily controlled from software via easy instructions (ie: no serial, parallel or anything… just firewire and USB, etc.)

Because it was basically impossible to convey information to myself I followed a technique that mjg59 recommended: insert calls to reboot the machine at certain points in the code. If the machine reboots, it got that far. If it doesn’t reboot, it crashed first. By doing this over and over (it took me about 90 boots) you can narrow down where the crash is.

And, speaking on behalf of tons of macbook owners out there, thanks for doing this!