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Re: [Xen-devel] Xen suspend

To: Kurt Garloff <kurt@xxxxxxxxxx>
Subject: Re: [Xen-devel] Xen suspend
From: Ian Pratt <Ian.Pratt@xxxxxxxxxxxx>
Date: Tue, 30 Nov 2004 13:59:33 +0000
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxxx, Ian.Pratt@xxxxxxxxxxxx
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> (b) Running Xen
>     The laptop goes into suspend mode immediately.
>     It also wakes up again.
>     The OS does not seem involved in suspending at all. dmesg does not
>     show any signs of this event not even xm dmesg does.
>     After waking up, however, the touchpad (synaptics) in domain 0 is 
>     unusable and the kernel spits
>     TouchPad at isa0060/serio1/input0 lost sync at byte 1
>     I'm unsure whether other devices are in a sane state.
>     The next xm create killed the machine :-(
> Is this supposed to work?
> Shouldn't Xen ask the domain0 kernel to suspend the devices?

I'm afraid 2.0 currently has no support for either APM or ACPI
power management. All bets are off when you shut the lid :-(

The roadmap for 2.1/3.0 has us heading in the right direction
with making more of this stuff visible to domain 0 so we can use
the existing Linux code. 

For the moment, it mightn't be too hard to hack software
suspend/resume to do the right thing...


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