On Saturday 24 December 2005 01:43, Joe Feise wrote:
> [Note: please cc me on answers since I'm not subscribed to the kernel list]
>
> I am experiencing problems with mouse resyncing in the -mm series.
> This is a Logitech wheel mouse connected through a KVM.
> Symptom: whenever the mouse isn't moved for some seconds, it doesn't
> react to movement for a second, and then resyncs. Sometimes, the
> resyncing results in the mouse pointer jumping, which as far as I
> know is a protocol mismatch.
> While searching for reports of similar problems, I came across
> Frank Sorenson's post from Nov. 23 (http://lkml.org/lkml/2005/11/23/533).
> Like in his case, reverting
> input-attempt-to-re-synchronize-mouse-every-5-seconds.patch
> resulted in a kernel without this problem.
>
Joe,
Instead of reverting input-attempt-to-re-synchronize-mouse-every-5-seconds
patch could youplease drop the patch below on top of -mm.
Jet me know if your mouse stays synchronized. Thanks!
--
Dmitry
drivers/input/mouse/psmouse-base.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
Index: linux/drivers/input/mouse/psmouse-base.c
===================================================================
--- linux.orig/drivers/input/mouse/psmouse-base.c
+++ linux/drivers/input/mouse/psmouse-base.c
@@ -1029,6 +1029,23 @@ static int psmouse_switch_protocol(struc
else
psmouse->type = psmouse_extensions(psmouse, psmouse_max_proto, 1);
+ /*
+ * If mouse's packet size is 3 there is no point in polling the
+ * device in hopes to detect protocol reset - we won't get less
+ * than 3 bytes response anyhow.
+ */
+ if (psmouse->pktsize == 3)
+ psmouse->resync_time = 0;
+
+ /*
+ * Some smart KVMs fake response to POLL command returning just
+ * 3 bytes and messing up our resync logic, so if initial poll
+ * fails we won't try polling the device anymore. Hopefully
+ * such KVM will maintain initially selected protocol.
+ */
+ if (psmouse->resync_time && psmouse->poll(psmouse))
+ psmouse->resync_time = 0;
+
sprintf(psmouse->devname, "%s %s %s",
psmouse_protocol_by_type(psmouse->type)->name, psmouse->vendor, psmouse->name);
-
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