Re: SpeedStep / Geyserville lockups?
Heather wrote:
>
> > > > > Is anyone else out there seeing lockups under 2.2.x (2.2.18 here) with a
> > > > > PIII SpeedStep (aka Geyserville) chip?
> > > > >
> > > > > I've had lockups over the past week I suspect are due to CPU step-speed
> > > > > changes resulting from power source switching.
>
> I believe that Speedstep machines are much more stable if they are always
> (re)booted while attached to wall power. Suspends and resumes should behave
> much better, but *those* depend on whether your APM BIOS is crappy :(
>
> The reasoning is, boot time is when the kernel measures its bogomips, to
> figure out what sorts of timings to use for hardware-driver matters.
>
> If you start at say, 500 MHz, but later go to 800 MHz, then your bogomips
> are too low and something critical may not wait long enough during an
> otherwise inocuous device reset or command. Oops, panic, whatever. You can
> get lucky a lot before it fails for "no reason". Bad juju.
>
> I personally suspect that some things may not be all that well behaved "at
> the wrong speed" too but I have no direct experience with that.
That's really interesting. I haven't had any lock-ups on this system at all (I
finally got an IBM A21p). I have seen bogomips ratings of between 187 and 1690.
Perhaps the BIOS manages to sort this out for me?
Suspend / resume have also worked flawlessly, apart from the (apparently) standard
sound driver bugs, requiring ALSA to be restarted on resume.
Regards,
Andrew.
--
_____________________________________________________________________
Andrew McMillan, e-mail: Andrew@catalyst.net.nz
Catalyst IT Ltd, PO Box 10-225, Level 22, 105 The Terrace, Wellington
Me: +64(21)635-694, Fax: +64(4)499-5596, Office: +64(4)499-2267xtn709
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