[ltp] Locking up when line power failure

[Josh]

I wonder if the power loss and return might have been accompanied by a 
power surge as well.

Also I've had my machine lock up if undocked improperly. When the 
docking station lost power it probably appeared to the laptop to be 
undocked improperly and didn't remove the devices properly.

John Jason Jordan wrote:
> Thinkpad T61, Hardy x86_64, up to date, everything works that I care to
> have work. 
>
> I live in a city so electric power is pretty reliable. Nevertheless,
> two or three times a year there will be a momentary loss - sufficient
> to kill my desktop computer, but the lights merely flicker off and back
> on.
>
> My T61 lives at home 95% of the time, where it is plugged into a
> docking station. The battery is always fully charged, unless I have
> just returned from school or someplace where I used it on battery power
> alone. 
>
> Yesterday I returned home to find that the T61 was locked up and the
> desktop computer and the stereo turned off. Everything else in the
> house was running fine. As I said, this has happened before. It is no
> big deal to turn the stereo back on and reboot the desktop computer.
> For that matter, rebooting the T61 is not a big deal either, as I never
> leave either computer with unsaved work. 
>
> However, why does the T61 lock up? When the line power goes out it
> should just switch to battery, and when the line power is restored it
> should just switch back to line power and recharge the battery as
> necessary. There should be no effect on the running condition of the
> computer. Indeed, the computer is still running. The wireless and
> bluetooth lights are lit up and when I move my bluetooth mouse the
> bluetooth light flickers a bit as it always does when I move the mouse.
> But the screen is black and nothing I can do will get it back -
> Ctrl-Alt-F1 does not work, nor does Ctrl-Alt-Backspace. Yesterday I did
> manage to get Ctrl-Alt-F1 to get me to a command line by waiting a long
> time, but Ctrl-Alt-F7 just took me back to a black screen.
>
> A brief loss of mains power should not cause any problems. Does anyone
> have any comments or suggestions?
>