Laptop power management support

[Santiago Erquicia]

Are you testing any laptop?  I have a Toshiba with a trident video card.
Is this going to work for me?

Santiago

On Wed, 2004-11-10 at 14:50 +0000, Matthew Garrett wrote:
> I've been doing some work on power management support. Note that this is
> all highly experimental, so proceed with caution. It may eat your disks.
> 
> There's two parts to this - kernel support and userspace support. Add
> 
> deb http://www.srcf.ucam.org/~mjg59/laptops/ ./
> 
> to /etc/apt/sources.list and do
> 
> sudo apt-get install linux-image-2.6.9-1-386 acpi-support
> 
> First, if you're using the i810 video driver, edit
> your /etc/X11/XF86Config-4 (or /etc/X11/xorg.conf if you're using Xorg)
> and in the driver section add 
> 
> option "VBERestore" "true"
> 
> Now edit /boot/grub/menu.list. Find the # kopt line and add
> resume=/dev/hdwhatever - it should point at your swap partition. For
> reference, mine is
> 
> # kopt root=/dev/hda1 resume=/dev/hda2 ro
> 
> Now do sudo update-grub and reboot. The power button should now cause a
> suspend to disk. Boot again and it should resume (there may be a
> moderately long pause before the resume process starts at the moment - I
> need to spend some time looking at that).
> 
> If that works, try pressing your laptop's sleep button (normally Fn
> +Escape, Fn+F4 or something like that). Test this from X, not from the
> console. With a bit of luck, various messages will fly past and the
> machine will suspend to RAM. If the machine /doesn't/ suspend, please
> follow up with information about the last few messages.
> 
> Now try pressing the power button again (on some machines, you may need
> to hold it for a second or so). With rather more luck, the machine will
> resume and you'll have an X desktop again. If it doesn't, please follow
> up with the symptoms.
> 
> Known issues:
> 
> If mysqld is running, the suspend will be blocked. Stop it first.
> 
> Various machines refuse to resume from suspend to RAM, for reasons that
> are currently entirely unclear. If your machine hangs with a blank
> screen or simply reboots, then there's not a lot we can do right at the
> moment (though in the former case, there is some further debugging which
> can be carried out)
> 
> It's entirely possible that the laptop will resume but you won't have
> any video support. Again, follow up with some hardware information.
> -- 
> Matthew Garrett | mjg59 at srcf.ucam.org
> 
> 
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