Re: [patch] suspend: update warnings

[Pavel Machek]

Hi!

> > > > + * If you have unsupported (*) devices using DMA, you may have some
> > > > + * problems. If your disk driver does not support suspend... (IDE does),
> > > > + * it may cause some problems, too. If you change kernel command line 
> > > > + * between suspend and resume, it may do something wrong. If you change 
> > > > + * your hardware while system is suspended... well, it was not good idea;
> > > > + * but it wil probably only crash.
> > > 
> > > The most common driver issues I see involve:
> > > - USB being built in or as modules that are still loaded while
> > > suspending (getting better, but not there yet)
> > > - DRI being used in X where the drivers don't properly support
> > > suspend/resume (NVidia esp)
> > > - Firewire
> > > - CPU Freq  (improving too)
> > > 
> > > It might be good to mention these areas too.
> > 
> > Well, right; but those 'only' cause system to crash during suspend. I
> > was talking about really dangerous stuff.
> > 
> > Both usb and cpufreq seems to work okay here.
> 
> It depends on what you're using. I believe one of the usb root hub
> drivers is okay, the others aren't. Similar for cpufreq. USB certainly
> accounts for a high percentage of the failures I see.

Do you remember which one is it? I have UHCI here, and it seems to
work okay. powernow-k8 and cpufreq-centrino also seems to behave ok.

								Pavel
-- 
if you have sharp zaurus hardware you don't need... you know my address
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