linux-kernel - Re: 2.6.20-rc5: usb mouse breaks suspend to ram

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Message-ID: <20070116214706.GA2182@elf.ucw.cz>
Date:	Tue, 16 Jan 2007 22:47:06 +0100
From:	Pavel Machek <pavel@....cz>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	kernel list <linux-kernel@...r.kernel.org>,
	Linux usb mailing list 
	<linux-usb-devel@...ts.sourceforge.net>
Subject: Re: 2.6.20-rc5: usb mouse breaks suspend to ram

Hi!

> >> >I started using el-cheapo usb mouse... only to find out that it breaks
> >> >suspend to RAM. Suspend-to-disk works okay. I was not able to extract
> >> >any usefull messages...
> >> >
> >> >Resume process hangs; I can still switch console and even type on
> >> >keyboard, but userland is dead, and I was not able to get magic sysrq
> >> >to respond.
> >>
> >> Are you using hid or usbmouse?
> >
> >I think it is hid:
> >
> >pavel@amd:/data/l/linux$ cat .config | grep MOUSE
...
> >pavel@amd:/data/l/linux$
> >
> >Should I disable config_hid and try some other driver?
> 
> No, HID is the preferred... I am not sure what is going on - on my box
> STR does not work at all thanks to nvidia chip turning the display on
> all the way as the very last step of suspend ;(

Hmm, I guess we should fix the suspend for you...

Strange, I can't reproduce the hang any more.

I found other weirdness while trying to hang it: if I move the mouse
while suspending, it is _not_ completely powered off while machine is
suspended. LED still shines, at half brightness...?! 
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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