Resume from standby not working from USB event

[Derek Broughton]

Daniel Eichhorn wrote:

>>
> Hi Derek
> 
> Thanks a lot for answering!
>>
>> I trust you're aware that S1 (sleep) does _not_ actually turn the
>> machine off.  It should turn your display and drives off.
>>
> Yes, I realize that. Unfortunately it seems that S1 is my only option
> to somehow turn the laptop silent and still be able to wake it up by
> external (USB) device

Right.  I got that, but wasn't sure you really understood the machine was
not "off".

>> are you sure it doesn't really react to keyboard input?  If you left
>> tty1
>> logged in as root, with "shutdown -r now" waiting for an <enter>,
>> put the
>> system into standby, wake it, and then try ctrl-alt-F1 and <enter>, I
>> rather expect it to reboot (ie, your system really does wake, but it
>> doesn't reset your video).  Another thing to try is to switch to tty1,
>> _then_ sleep and resume (maybe even without X running).

> Nice idea! I tried that and it didn't help:-(. 

I didn't really hold out much hope :-(  That worked for me often in the
early days of hibernation with intel i910 graphics, but hasn't been
necessary for a couple of years.

> There's another hint 
> that suggests that not only video doesn't fully recover: the pcmcia
> network card doesn't come up again. I can't ping the machine and the
> activity leds on the card are out as well after a wake up by USB.

I'm not sure that means that the hardware hasn't woken - I don't know
whether the network interfaces are taken down on S1, but on S3/S4 the acpi
daemon actually "ifdown"s every interface and rmmods the driver for good
measure.  So it could just be that the driver hasn't been reinserted.

> hibernate is a ubuntu package that offers quite a lot of tools and
> configuration options for suspending the machine. But since the hard
> way (writting standby to he /proc/acpi file) results in exactly the
> same way I think it doesn't matter if I use the pm tools (tried that
> as well btw:-))

I see it says "can optionally restart networking" - so make sure that's
enabled.  If you can get that network card to wake up, it would be
interesting to see if you can ssh into the machine.
-- 
derek