Messages in this thread | | | Date | Tue, 23 Aug 2005 14:58:50 +0200 | From | Pavel Machek <> | Subject | Re: [patch] suspend: update warnings |
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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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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