Ok, folks. This is a test patch for the psm driver. I would like you
to do some test for me.
This is NOT the fix for the infamous "psmintr out of sync" message,
but is a test patch to see how things are on your machines. The patch
is for both CURRENT and STABLE.
Please apply the patch to /sys/isa/psm.c (make backup copy first!),
and rebuild the kernel. I would like you to carry out two tests:
Test #1.
Make sure you remove the flags 0x100 from the psm driver and see how
your PS/2 mouse works.
You may still see "psmintr out of sync", but I would like to know if
the mouse pointer goes berserk when this message appears, or it seems
to operate properly despite the message.
Test #2.
Add the flags 0x100 (NOCHECKSYNC) to the psm driver and see what
happens.
Please report your results together with your motherboard model, mouse
model, FreeBSD version, mouse settings in /etc/rc.conf and XF86Config,
and /var/run/dmesg.boot (after you reboot the kernel by typing "boot
-v" at the boot loader prompt).
Thank you for your cooperation.
Kazu
Index: psm.c
===================================================================
RCS file: /src/CVS/src/sys/isa/psm.c,v
retrieving revision 1.26
diff -u -r1.26 psm.c
--- psm.c 2000/04/19 14:57:50 1.26
+++ psm.c 2000/06/09 01:19:59
@@ -1830,10 +1830,11 @@
unit = (int)arg;
sc = devclass_get_softc(psm_devclass, unit);
- if (sc->watchdog) {
+ if (sc->watchdog && kbdc_lock(sc->kbdc, TRUE)) {
if (verbose >= 4)
log(LOG_DEBUG, "psm%d: lost interrupt?\n", unit);
psmintr(sc);
+ kbdc_lock(sc->kbdc, FALSE);
}
sc->watchdog = TRUE;
sc->callout = timeout(psmtimeout, (void *)unit, hz);
@@ -1880,18 +1881,6 @@
if ((sc->state & PSM_OPEN) == 0)
continue;
- /*
- * Check sync bits. We check for overflow bits and the bit 3
- * for most mice. True, the code doesn't work if overflow
- * condition occurs. But we expect it rarely happens...
- */
- if ((sc->inputbytes == 0)
- && ((c & sc->mode.syncmask[0]) != sc->mode.syncmask[1])) {
- log(LOG_DEBUG, "psmintr: out of sync (%04x != %04x).\n",
- c & sc->mode.syncmask[0], sc->mode.syncmask[1]);
- continue;
- }
-
sc->ipacket[sc->inputbytes++] = c;
if (sc->inputbytes < sc->mode.packetsize)
continue;
@@ -1904,6 +1893,13 @@
c = sc->ipacket[0];
+ if ((c & sc->mode.syncmask[0]) != sc->mode.syncmask[1]) {
+ log(LOG_DEBUG, "psmintr: out of sync (%04x != %04x).\n",
+ c & sc->mode.syncmask[0], sc->mode.syncmask[1]);
+ sc->inputbytes = 0;
+ continue;
+ }
+
/*
* A kludge for Kensington device!
* The MSB of the horizontal count appears to be stored in
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