Re: KVMs & psmouse losing sync

[Thomas Svedberg <thsv@am.chalmers.se>]

Dmitry Torokhov wrote:
> Hi,
> 
> Here is my next attempt at resolving the problem with psmouse losing sync
> when used with KVMs that suppress psmouse announcements when switching back
> to linux box.
> 
> The new parameter psmouse.poll is used to have the driver periodically send
> "enable" command to the mouse if there was no data from the device in last
> <poll> msec. If the command errors or times out the driver assumes that the
> mouse was disconnected and next time there is data on the same serio port
> the driver will attempt to reconnect.
> 
> The advantages of this approach is that it should work well regardless of
> the protocol (normally it is very hard to differentiate between bare PS/2
> and PS2++) and driver will not pass any bad packets to userpace. The main
> cpms is that we're toast if KVM ACKs the command even when mouse/kbd are
> connected to another box. 
> 
> The patch is against vanilla 2.6.9, boot with psmouse.poll=500. I would
> appreciate comments/testing. Thanks!

Works great with my Belkin Omni Cube, thank you!

-- 
/ Thomas
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  Thomas Svedberg
  Department of Applied Mechanics
  Chalmers University of Technology

  Address: SE-412 96 Göteborg, SWEDEN
  E-mail : thsv@am.chalmers.se, thsv@bigfoot.com
  Phone  : +46 31 772 1522
  Fax    : +46 31 772 3827
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