Re: apm suspend broken in 2.4.10

[Randy.Dunlap]

Alex Cruise wrote:
> 
> 2.4.7 has the apm=on bug and won't suspend either... I'm beginning to
> suspect that something else is afoot, but I might as well try 2.4.2...
> 
> Funny, with 2.4.2, "apm=on" seems to work as expected, and the first time I
> tried "apm --suspend", the screen blanked but nothing else appeared to
> happen.  When I hit a key, the suspend command appeared to still be running.
> I switched to a different vc and did a "ps ax", it looked like it was  stuck
> in the middle of trying to unmount an smbfs filesystem.
> 
> Next time I booted up, I umounted the smbfs system and did an "apm
> --suspend" that appears to have shut everything down... And when I hit the
> power button, it comes up again, albeit with an incredibly dim screen (a
> common problem on this Dell Latitude C600).
> 
> So, from the point of view of my laptop, something important seems to have
> changed between 2.4.2 and 2.4.7.
> 
> > I suspect that it's something like a single driver change (not apm,
> > but PM-support in a driver).  How many I/O-device drivers do you
> > use?  Would it be difficult to try to isolate which one may be
> > faulty?
> 
> How would I find out what driver(s) might be vetoing my suspend request?
> 
> Here's the complete list of modules which might typically be loaded at boot:
> 
> 3c59x
> smbfs
> lns_cp437
> vfat
> fat
> ide-cd
> cdrom
> md
> usb-uhci
> usbcore
> maestro3
> sound
> soundcore
> ac97_codec
> r128
> agpgart
> usb-uhci
> usbcore

Unload some of these (that you don't really need to run)
and try "apm -s".

If that fails, unload some more of them and try again...

That would at least narrow down the search for us.

~Randy