Messages in this thread Patch in this message | | | Date | Tue, 30 Oct 2007 06:53:04 -0700 | From | "H.J. Lu" <> | Subject | PATCH: PR Input Devives/2082: PS/2 mouse out of sync after switching with KVM switch |
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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. 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.
BTW, please CC me when reply. Thanks.
H.J. ---- --- linux-2.6.23.x86_64/drivers/input/mouse/psmouse-base.c.reset 2007-10-09 13:31:38.000000000 -0700 +++ linux-2.6.23.x86_64/drivers/input/mouse/psmouse-base.c 2007-10-26 23:27:55.000000000 -0700 @@ -302,11 +302,11 @@ static irqreturn_t psmouse_interrupt(str if (psmouse->state == PSMOUSE_ACTIVATED && psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) { - printk(KERN_INFO "psmouse.c: %s at %s lost synchronization, throwing %d bytes away.\n", - psmouse->name, psmouse->phys, psmouse->pktcnt); + printk(KERN_INFO "psmouse.c: %s at %s lost synchronization, issuing reconnect request.\n", + psmouse->name, psmouse->phys); psmouse->badbyte = psmouse->packet[0]; - __psmouse_set_state(psmouse, PSMOUSE_RESYNCING); - queue_work(kpsmoused_wq, &psmouse->resync_work); + __psmouse_set_state(psmouse, PSMOUSE_IGNORE); + serio_reconnect(psmouse->ps2dev.serio); goto out; } - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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