Messages in this thread | | | Date | Tue, 30 Oct 2007 10:25:18 -0700 | From | "H.J. Lu" <> | Subject | Re: PATCH: PR Input Devives/2082: PS/2 mouse out of sync after switching with KVM switch |
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On Tue, Oct 30, 2007 at 12:53:17PM -0400, Dmitry Torokhov wrote: > Hi, > > On 10/30/07, H.J. Lu <hjl@lucon.org> wrote: > > The bug report is at > > > > http://bugzilla.kernel.org/show_bug.cgi?id=2082 > > > > Problem Description: When switching to another machine with a KVM > > switch and back, the mouse is out of control, with X.Org. To recover, > > I have to unplug the mouse cable and plug it back. > > > > Steps to reproduce: Have a wheel mouse connected and X.Org. Keyboard, > > Mouse and Video are connected to a KVM switch. Switch to another > > machine and back. You have lost the usage of wheel on mouse. > > > > This patch for 2.6.23 tries to reconnect the mouse after KVM switch. > > It doesn't completely solve the problem. Mouse still got a few random > > bytes after KVM switch. > > Have you tried psmouse.resync_time=5 option?
My psmouse is kernel builtin. I tried "psmouse.proto=imps" and it worked. But I don't want to change kernel boot option for each kernel on each machine behind KVM.
> > Any change you coudl do > > echo 1 > /sys/module/i8042/parameters/debug > > before switrching KVM back and forth and send me dmesg?
I will try it when I get home.
> > > But it recovers with kernel message: > > > > psmouse.c: Wheel Mouse at isa0060/serio1/input0 lost synchronization, issuing reconnect request. > > > > instead of > > > > psmouse.c: Wheel Mouse at isa0060/serio1/input0 lost synchronization, throwing 3 bytes away. > > > > and never recovering from it. > > > > I am hesitant queuing reconnect immediately - if the byte was delayed > because embedded controller was busy doing something else and we start > querying mouse at the wrong time we might lose mouse altogether. >
As it stands now, my Microsoft wheel mouse isn't usable at all after KVM switch without my patch. I had to reset mouse cable to get it back.
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