linux-kernel - Re: converting appletouch to usb autosuspend again...

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Date:	Thu, 28 Aug 2008 15:41:11 +0000
From:	Soeren Sonnenburg <kernel@....de>
To:	Oliver Neukum <oliver@...kum.org>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>,
	Alan Stern <stern@...land.harvard.edu>,
	Jiri Kosina <jikos@...os.cz>
Subject: Re: converting appletouch to usb autosuspend again...

On Sun, 2008-08-24 at 20:39 +0200, Oliver Neukum wrote:
> Am Samstag 23 August 2008 23:00:18 schrieb Soeren Sonnenburg:
> > Dear all,
> > 
> > I wonder whether anyone else tried to get appletouch usb autosuspend to
> > work. I've seen Oliver's patch but as it kept oopsing on me and I
> 
> You might post the oops. I haven't seen it.

Do you have an updated version of your patch that applies to
git-current? I will give your patch another try then.

> > couldn't parse the usb_mark_last_busy logic I came up with the attached
> > patch against (current git; at least didn't oops for me over the last
> > several days and suspend/resume cycles).
> > 
> > However things I don't understand, 
> > 
> > a) is autosuspend on the appletouch driver used at all (how can I find
> > out)
> 
> Compile your kernel with CONFIG_USB_DEBUG and autosuspend will be logged.
> You need to activate autosuspend via sysfs.

OK, indeed it never autosuspends... I guess this is this due to the
keyboard and the mice being on the same usb port and as the kbd part
does not support autosuspend it never suspends?!

> > b) do I need dev->intf->needs_remote_wakeup = 1; ?
> 
> Yes.
> 
> > c) is line 33 in the patch safe to do ?
> 
> Why do you want to add it?

Well reaching this line the touchpad is idling (hasn't been touched+no
button was pressed) - I somehow wanted to force it to suspend in this
case.

> > And while we are at it I am still seeing these X falls back to hid mouse
> > mode, only switching to console and back resolves this (looks like this
> > only worked in previous kernels as resume from s2ram took a lot longer
> > due to the IDE driver doing a couple of resets) - is there anything one
> > could do about it?
> 
> Post a log.

My fault. I was still rmmod'ing appletouch before suspending. It works
perfectly + reliably the way it is.

Thanks,
Soeren
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