From: Dmitry Torokhov <dtor_core@ameritech.net>
To: Anthony DiSante <theant@nodivisions.com>
Subject: Re: mouse still losing sync and thus jumping around
Date: Wed, 23 Feb 2005 22:18:56 -0500
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On Wednesday 23 February 2005 22:05, Anthony DiSante wrote:
> Dmitry Torokhov wrote:
> > Yes, It usually happens either under high load, when mouse interrupts are
> > significantly delayed. Or sometimes it happen when applications poll
> > battey status and on some boxes it takes pretty long time. And because
> > it is usually the same chip that serves keyboard/mouse it again delays
> > mouse interrupts.
> 
> I have this problem with recent 2.6.10 kernels too, but it has nothing to do 
> with load in my case; it happens whenever I switch my KVM to the linux box.
> 

Hi Anthony,

This is a bit different problem and we trying to find a reliable solution
for it.

> Long ago and far away, it used to be that switching out of X, then back in 
> (ctrl-alt-F1, then ctrl-alt-F7) would reset the mouse and stop the jumping. 
>   At some point in late 2.4/early 2.6 that stopped working, and the only fix 
> was to unplug the mouse from the KVM switch and re-plug it.
> 
> In Oct 2004 I posted to lkml with subject "KVM -> jumping mouse... still no 
> solution?"  Dmitry Torokhov (hi :) responded that this would work on 2.6.9-rc3+:
> 
> 	echo -n "reconnect" > /sys/bus/serio/devices/serioX/driver
> 
> That was GREAT and it worked for a while, but now my last few 2.6.10 kernels 
> don't seem to care when I do that, and again, unplugging the mouse is the 
> only thing that works.  I'm currently running 2.6.10-gentoo-r6.
> 

It still should work fine, but in a bit different form:

	echo -n "reconnect" > /sys/bus/serio/devices/serioX/drvctl

I.e. substitute "driver" with "drvctl" as now "driver" is a symlink to
a currently bound driver that is set up by driver core.

-- 
Dmitry
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