Re: [2.5.54-dj1-bk] Some interesting experiences...

[Vojtech Pavlik <vojtech@suse.cz>]

On Wed, Jan 08, 2003 at 02:51:07AM +0100, Anders Gustafsson wrote:
> On Tue, Jan 07, 2003 at 05:21:46PM -0800, Joshua Kwan wrote:
> > 
> > 3. [linux-2.5] PS/2 mouse goes haywire every 30 seconds or so of use.
> > dmesg sayeth:
> > mice: PS/2 mouse device common for all mice
> > input: PS/2 Synaptics TouchPad on isa0060/serio4
> > 
> > but more importantly this is the cause:
> > 
> > psmouse.c: Lost synchronization, throwing 2 bytes away.
> > psmouse.c: Lost synchronization, throwing 2 bytes away.
> 
> This happens here too. But not that frequent at all, more like once every
> hour. And has happend on all kernels since at least 2.5.46 [1].
> 
> However 5 hours ago I changed the timeout in psmouse.c from 50ms to 100ms.
> And now it haven't misbehaved yet, but that might be just some nightly luck. 
> Is there something that turns off interupts or something and hinders the
> mouse driver from processing the data for such long time? Or is my hardware
> just buggy?

That I'd like to know, too. In the worst case, we can make the timeout
be half a second, or more - it'd just mean that for a resync you would
have to not touch the mouse this long if really a byte is lost.

> [1] http://marc.theaimsgroup.com/?l=linux-kernel&m=103688231622278&w=2
> 
> -- 
> Anders Gustafsson - andersg@0x63.nu - http://0x63.nu/

-- 
Vojtech Pavlik
SuSE Labs