Software suspend (was Re: [vdr] boot times)

Patrick Boettcher patrick.boettcher at desy.de
Sun Jun 26 12:00:36 CEST 2005


On Sun, 26 Jun 2005, Roland Behme wrote:

> Hi Patrick,
>
>> Yes, I unload the DVB drivers before suspending and reload them after
>> resuming. Because of the firmware load of the DVB-USB-devices (after
>> firmware load they do a soft-reboot and appear as a "new" device) I had to
>> add a small delay of 3 seconds, that's what I meant by quirk.
>
> Thanks for sharing your experience. That's very interesting because
> I'm trying to improve the boot-time of my VDR for some months.
>
> Would a hibernated PC wake up by Wake-on-LAN or Wake-on-Ring?

If you have it enabled in your bios, yes.

Software Suspend2 is software based. It can but it does not need 
ACPI-sleep-modes from the bios. It dumps the memory to the harddisk and 
does a normal power-off.

When you boot the machine it loads the kernel normally and then 
it restores the memory from the harddisk.

I'm using the filewriter, so I don't need to repair the swap-space 
afterwards.

You just have to take care about incompatible modules (DVB) and services 
(VDR, because it depends on DVB). The hibernate-script (which I would 
highly recommend to manage software-suspend) is a very good help to work 
around quirks.

Patrick.

--
   Mail: patrick.boettcher at desy.de
   WWW:  http://www.wi-bw.tfh-wildau.de/~pboettch/



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