Incidentally, the bug I'm working around here is quite arguably a bug
in drivers/char/apm_bios.c. apm_bios.c treats the APM bios as a source
of asynchronous events, and queries it regularly. Whereas IBM's bios
appears to behave as if it were synchronous -- it doesn't expect you to
query it again while you're supposedly busy suspending. What ends up
happening is that the tiny 20 element event queues overflow, and there's
no overflow detection.
But your problem sounds different from the problems I've had with my
older 560.
Dean
On 28 Jan 1998, Jan Rychter wrote:
> >>>>> "John" == John Goerzen <jgoerzen@southwind.net>:
> John> Hi, I just got a new Thinkpad 310ED (133 MMX). Of course, I
> John> quickly took Windows down to size and installed Linux.
>
> John> I've installed the pcmcia utilties and got them working without
> John> problems.
>
> John> But the power management features don't seem to work under Linux,
> John> but they do under Windows 95.
>
> John> Specifically, the suspend feature (write all memory to disk and
> John> shut off) doesn't work. The LCD will briefly turn off, and then
> John> will beep and turn right back on and cause some hard disk
> John> activity for a bit.
>
> On my TP560 I had one thing bugging me for a long time -- if IRQ 9 was
> made available to the pcmcia-cs package, then at some point machine
> refused to hibernate. Not really predictable, e.g. it would happily
> hibernate 20 times and then suddenly refuse. Usually just when I was in
> *real* hurry :-)
>
> So, you might take a look at that.
>
> And BTW, for the ThinkPad 560 owners: anybody got suspend to work (not
> hibernation, not standby, SUSPEND == fn-f4) ? My machine w/Linux happily
> suspends and then never wakes up. I can open&close the screen, tap the
> keys, etc, no go. Nada. Have to disconnect AC and remove the batteries.
>
> --J.
>