(..and older vbox versions.)
Hi!
I just saw this vbox ticket:
http://www.virtualbox.org/ticket/6488
(`Mouse wheel scrolling interpredted as click events in guest -> fixed
after the 3.1.6 release')
..which sounded just like what a physical mouse I have (MS `IntelliMouse
Optical 1.1A' according to whats printed on the bottom) did outside of
a VM too, so I got curious and patched my psm driver to disable the KVM
hack mentioned in that ticket which was introduced back in Apr 2000 by
this commit:
http://svn.freebsd.org/viewvc/base?view=revision&revision=58923
(`Add temporary workaround to fool some "clever" KVM switch products
which think they know the IntelliMouse 4-byte packet and believe,
wrongly, that any other protocols use 3-byte packets.')
..and indeed, now the stray click events are gone for me too! :)
So now I made a patch that allows disabling that KVM hack via device
hints, appended below. (hint.psm.0.flags="0x10000" - or do you guys
think the hack should be disabled by default instead?)
Cheers,
Juergen
Index: src/sys/dev/atkbdc/psm.c
===================================================================
RCS file: /home/scvs/src/sys/dev/atkbdc/psm.c,v
retrieving revision 1.104.2.2
diff -u -p -r1.104.2.2 psm.c
--- src/sys/dev/atkbdc/psm.c 20 Aug 2009 20:23:28 -0000 1.104.2.2
+++ src/sys/dev/atkbdc/psm.c 11 May 2010 18:06:01 -0000
@@ -326,6 +326,7 @@ static devclass_t psm_devclass;
#define PSM_CONFIG_HOOKRESUME 0x2000 /* hook the system resume event
*/
#define PSM_CONFIG_INITAFTERSUSPEND 0x4000 /* init the device at the
resume event */
#define PSM_CONFIG_SYNCHACK 0x8000 /* enable `out-of-sync' hack */
+#define PSM_CONFIG_NOKVMHACK 0x10000 /* disable IntelliMouse
Explorer KVM hack */
#define PSM_CONFIG_FLAGS \
(PSM_CONFIG_RESOLUTION | \
@@ -337,7 +338,8 @@ static devclass_t psm_devclass;
PSM_CONFIG_FORCETAP | \
PSM_CONFIG_IGNPORTERROR | \
PSM_CONFIG_HOOKRESUME | \
- PSM_CONFIG_INITAFTERSUSPEND)
+ PSM_CONFIG_INITAFTERSUSPEND | \
+ PSM_CONFIG_NOKVMHACK)
/* other flags (flags) */
#define PSM_FLAGS_FINGERDOWN 0x0001 /* VersaPad finger down */
@@ -3779,20 +3781,23 @@ enable_msexplorer(struct psm_softc *sc)
sc->hw.hwid = id;
sc->hw.buttons = 5; /* IntelliMouse Explorer XXX */
- /*
- * XXX: this is a kludge to fool some KVM switch products
- * which think they are clever enough to know the 4-byte IntelliMouse
- * protocol, and assume any other protocols use 3-byte packets.
- * They don't convey 4-byte data packets from the IntelliMouse Explorer
- * correctly to the host computer because of this!
- * The following sequence is actually IntelliMouse's "wake up"
- * sequence; it will make the KVM think the mouse is IntelliMouse
- * when it is in fact IntelliMouse Explorer.
- */
- for (i = 0; i < sizeof(rate0)/sizeof(rate0[0]); ++i)
- if (set_mouse_sampling_rate(kbdc, rate0[i]) != rate0[i])
- break;
- id = get_aux_id(kbdc);
+ if (!(sc->config & PSM_CONFIG_NOKVMHACK)) {
+ /*
+ * XXX: this is a kludge to fool some KVM switch products
+ * which think they are clever enough to know the 4-byte
+ * IntelliMouse protocol, and assume any other protocols
+ * use 3-byte packets.
+ * They don't convey 4-byte data packets from the IntelliMouse
+ * Explorer correctly to the host computer because of this!
+ * The following sequence is actually IntelliMouse's "wake up"
+ * sequence; it will make the KVM think the mouse is
+ * IntelliMouse when it is in fact IntelliMouse Explorer.
+ */
+ for (i = 0; i < sizeof(rate0)/sizeof(rate0[0]); ++i)
+ if (set_mouse_sampling_rate(kbdc, rate0[i]) != rate0[i])
+ break;
+ id = get_aux_id(kbdc);
+ }
return (TRUE);
}
Index: src/share/man/man4/psm.4
===================================================================
RCS file: /home/scvs/src/share/man/man4/psm.4,v
retrieving revision 1.49.2.1
diff -u -p -r1.49.2.1 psm.4
--- src/share/man/man4/psm.4 3 Aug 2009 08:13:06 -0000 1.49.2.1
+++ src/share/man/man4/psm.4 11 May 2010 18:04:16 -0000
@@ -349,6 +349,11 @@ after the `resume' event.
It has no effect unless the
.Em HOOKRESUME
flag is set as well.
+.It bit 16 NOKVMHACK
+This flag disables the IntelliMouse Explorer protocol KVM switch
+workaround that makes some virtual machine's mouse emulations as well
+as at least one physical IntelliMouse Optical model misbehave
+(causing the scroll wheel to produce stray click events.)
.El
.Sh LOADER TUNABLES
Extended support for Synaptics touchpads can be enabled by setting
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