[ltp] Hard lock on T42p

[Mat Marcus]

I had a similar problem with recent Ubuntu distributions on a T42p.
When I only could get the fan, black screen and Z light, but no POST,
I nearly gave it up for dead. I tried the usual suggestions of
removing the battery, etc., to no avail. I finally disassembled the
machine far enough to also remove the CMOS backup battery. Then when I
reassembled the machine POST began succeeding once more. The next time
that I suspended, the hard crash recurred. After a fair bit of trial
and error, and lots of disassembly/reassembly I found that the problem
seemed to be Bluetooth related. If I recall correctly, adding scripts
to run at suspend time with contents like:

  echo disabled > /proc/acpi/ibm/bluetooth

was what finally allowed me to wake the machine without crashing.

Hope this helps,
Mat

On Sat, May 30, 2009 at 6:44 AM, John <JohnRChamplin@columbus.rr.com> wrote:
> IBM T42p, running Debian, not quite up-to-date sid, dual booted with
> XP Pro.
>
> Recently I tried suspend (Fn-F4) for the first time. It appeared to
> suspend, but would not wake up again. Eventually I just held the power
> button down.
>
> Since then, the laptop is almost totally locked up: I get an initial
> flash of the lights, then only the Power On light (tilted Z). Not even
> the initial IBM display, much less grub. No Knoppix. The fan is
> on. Everything stops immediately if I hit the power button.
>
> I'd appreciate a hint on how to proceed. Even the right words for
> google would be a help. Could it be a hardware problem?
>
> --
> JohnRChamplin@columbus.rr.com
>