Hi,

I have a Lenovo Thinkpad T60 amd64 laptop (dmesg below) running 5.1-stable
(fresh install of -release from the CD set, then CVS update to -stable).
The touchpad

  pms0 at pckbc0 (aux slot)
  wsmouse0 at pms0 mux 0
  wsmouse1 at pms0 mux 0
  pms0: Synaptics touchpad, firmware 6.2

has an irritating problem in 5.1 (which was *not* present on this same
machine when running 5.0-{release,stable} with X video acceleration
disabled):  When running X (autoconfigured with no xorg.conf), the
pointer will intermittently jump to and "stick" at either the left side
of the screen, the top of the screen, or the top left corner.  When
stuck to the left side of the screen the pointer will only move up/down,
not left/right; when stuck to the top side of the screen the pointer
will only move left/right, not up/down; when stuck to the top left
corner the pointer won't move at all.

The only way I've found to recover from a "stuck" state is to press
(any) one of the touchpad buttons; that allows the pointer to be moved
in both directions again.

The mean occurence rate is on the order of 3-5 "stickings" per hour,
but there seems to be clustering, with several pairs or triplets less
than 10 seconds apart.  I've kept a log of all "stickings" this since
I updated to 5.1-stable 8 days ago.  In that time, I've had a total
of 118 "stickings" (24 top-side, 77 left-side, 17 top-left-corner),
including 5 in the time it took me to compose this message.

I think (but am not certain) that all the "stickings" have occured when
I used the touchpad to move the pointer.  That is, I think (but am not
certain) that no "sticking" has ever happened *without* my touching the
touchpad.

One other thing that may be relevant...  Moving from 5.0 to 5.1 the
touchpad is much more "sensitive", i.e., the ratio
  (cm pointer movement)/(cm finger movement on touchpad)
went up by about an order of magnitude.  In 5.0 and before I used
'xset m 2 10' in my .xinitrc; in 5.1 I'm using 'xset m 1/4' to
compensate for the higher sensitivity.

Has anyone else seen this "sticky touchpad" problem?  Is there a known
workaround/fix?  Are there useful debug options I could enable in the pms
driver or elsewhere to gather more information?

dmesg:
OpenBSD 5.1-stable (GENERIC.MP) #0: Wed May 23 21:13:00 EDT 2012
    r...@cobalt.astro.indiana.edu:/usr/src/sys/arch/amd64/compile/GENERIC.MP
real mem = 3218931712 (3069MB)
avail mem = 3119144960 (2974MB)
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.4 @ 0xe0010 (68 entries)
bios0: vendor LENOVO version "7IET23WW (1.04 )" date 12/27/2006
bios0: LENOVO 87424GU
acpi0 at bios0: rev 2
acpi0: sleep states S0 S3 S4 S5
acpi0: tables DSDT FACP SSDT ECDT TCPA APIC MCFG HPET SLIC BOOT SSDT SSDT SSDT 
SSDT
acpi0: wakeup devices LID_(S3) SLPB(S3) LURT(S3) DURT(S3) EXP0(S4) EXP1(S4) 
EXP2(S4) EXP3(S4) PCI1(S4) USB0(S3) USB1(S3) USB2(S3) USB7(S3) HDEF(S4)
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpiec0 at acpi0
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: Intel(R) Core(TM)2 CPU T7200 @ 2.00GHz, 1995.32 MHz
cpu0: 
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,SBF,SSE3,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,NXE,LONG,LAHF
cpu0: 4MB 64b/line 16-way L2 cache
cpu0: apic clock running at 166MHz
cpu1 at mainbus0: apid 1 (application processor)
cpu1: Intel(R) Core(TM)2 CPU T7200 @ 2.00GHz, 1995.00 MHz
cpu1: 
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,SBF,SSE3,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,NXE,LONG,LAHF
cpu1: 4MB 64b/line 16-way L2 cache
ioapic0 at mainbus0: apid 1 pa 0xfec00000, version 20, 24 pins
ioapic0: misconfigured as apic 2, remapped to apid 1
acpimcfg0 at acpi0 addr 0xf0000000, bus 0-63
acpihpet0 at acpi0: 14318179 Hz
acpiprt0 at acpi0: bus 0 (PCI0)
acpiprt1 at acpi0: bus 1 (AGP_)
acpiprt2 at acpi0: bus 2 (EXP0)
acpiprt3 at acpi0: bus 3 (EXP1)
acpiprt4 at acpi0: bus 4 (EXP2)
acpiprt5 at acpi0: bus 12 (EXP3)
acpiprt6 at acpi0: bus 21 (PCI1)
acpicpu0 at acpi0: C3, C2, C1, PSS
acpicpu1 at acpi0: C3, C2, C1, PSS
acpipwrres0 at acpi0: PUBS
acpitz0 at acpi0: critical temperature is 127 degC
acpitz1 at acpi0: critical temperature is 100 degC
acpibtn0 at acpi0: LID_
acpibtn1 at acpi0: SLPB
acpibat0 at acpi0: BAT0 model "92P1139" serial  3681 type LION oem "Panasonic"
acpibat1 at acpi0: BAT1 not present
acpiac0 at acpi0: AC unit online
acpithinkpad0 at acpi0
acpidock0 at acpi0: GDCK not docked (0)
cpu0: Enhanced SpeedStep 1995 MHz: speeds: 2000, 1667, 1333, 1000 MHz
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 "Intel 82945GM Host" rev 0x03
ppb0 at pci0 dev 1 function 0 "Intel 82945GM PCIE" rev 0x03: msi
pci1 at ppb0 bus 1
vga1 at pci1 dev 0 function 0 "ATI Radeon Mobility X1400" rev 0x00
wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
radeondrm0 at vga1: apic 1 int 16
drm0 at radeondrm0
azalia0 at pci0 dev 27 function 0 "Intel 82801GB HD Audio" rev 0x02: msi
azalia0: codecs: Analog Devices AD1981HD, 0x0000/0x0000, using Analog Devices 
AD1981HD
audio0 at azalia0
ppb1 at pci0 dev 28 function 0 "Intel 82801GB PCIE" rev 0x02: msi
pci2 at ppb1 bus 2
em0 at pci2 dev 0 function 0 "Intel PRO/1000MT (82573L)" rev 0x00: msi, address 
00:16:41:e4:89:7b
ppb2 at pci0 dev 28 function 1 "Intel 82801GB PCIE" rev 0x02: msi
pci3 at ppb2 bus 3
athn0 at pci3 dev 0 function 0 "Atheros AR5418" rev 0x01: apic 1 int 17
athn0: MAC AR5418 rev 2, RF AR5133 (2T3R), ROM rev 3, address 00:19:7e:6d:f9:88
ppb3 at pci0 dev 28 function 2 "Intel 82801GB PCIE" rev 0x02: msi
pci4 at ppb3 bus 4
ppb4 at pci0 dev 28 function 3 "Intel 82801GB PCIE" rev 0x02: msi
pci5 at ppb4 bus 12
uhci0 at pci0 dev 29 function 0 "Intel 82801GB USB" rev 0x02: apic 1 int 16
uhci1 at pci0 dev 29 function 1 "Intel 82801GB USB" rev 0x02: apic 1 int 17
uhci2 at pci0 dev 29 function 2 "Intel 82801GB USB" rev 0x02: apic 1 int 18
uhci3 at pci0 dev 29 function 3 "Intel 82801GB USB" rev 0x02: apic 1 int 19
ehci0 at pci0 dev 29 function 7 "Intel 82801GB USB" rev 0x02: apic 1 int 19
usb0 at ehci0: USB revision 2.0
uhub0 at usb0 "Intel EHCI root hub" rev 2.00/1.00 addr 1
ppb5 at pci0 dev 30 function 0 "Intel 82801BAM Hub-to-PCI" rev 0xe2
pci6 at ppb5 bus 21
cbb0 at pci6 dev 0 function 0 "TI PCI1510 CardBus" rev 0x00: apic 1 int 16
cardslot0 at cbb0 slot 0 flags 0
cardbus0 at cardslot0: bus 22 device 0 cacheline 0x8, lattimer 0xb0
pcmcia0 at cardslot0
pcib0 at pci0 dev 31 function 0 "Intel 82801GBM LPC" rev 0x02
pciide0 at pci0 dev 31 function 1 "Intel 82801GB IDE" rev 0x02: DMA, channel 0 
configured to compatibility, channel 1 configured to compatibility
atapiscsi0 at pciide0 channel 0 drive 0
scsibus0 at atapiscsi0: 2 targets
cd0 at scsibus0 targ 0 lun 0: <HL-DT-ST, DVDRAM GSA-4083N, 1.00> ATAPI 5/cdrom 
removable
cd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 2
pciide0: channel 1 ignored (disabled)
ahci0 at pci0 dev 31 function 2 "Intel 82801GBM AHCI" rev 0x02: msi, AHCI 1.1
scsibus1 at ahci0: 32 targets
sd0 at scsibus1 targ 0 lun 0: <ATA, WDC WD3200BEVT-0, 01.0> SCSI3 0/direct 
fixed naa.50014ee656688602
sd0: 305245MB, 512 bytes/sector, 625142448 sectors
ichiic0 at pci0 dev 31 function 3 "Intel 82801GB SMBus" rev 0x02: apic 1 int 23
iic0 at ichiic0
usb1 at uhci0: USB revision 1.0
uhub1 at usb1 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb2 at uhci1: USB revision 1.0
uhub2 at usb2 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb3 at uhci2: USB revision 1.0
uhub3 at usb3 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb4 at uhci3: USB revision 1.0
uhub4 at usb4 "Intel UHCI root hub" rev 1.00/1.00 addr 1
isa0 at pcib0
isadma0 at isa0
com1 at isa0 port 0x2f8/8 irq 3: ns16550a, 16 byte fifo
pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pms0 at pckbc0 (aux slot)
pckbc0: using irq 12 for aux slot
wsmouse0 at pms0 mux 0
wsmouse1 at pms0 mux 0
pms0: Synaptics touchpad, firmware 6.2
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
aps0 at isa0 port 0x1600/31
mtrr: Pentium Pro MTRR support
ugen0 at uhub4 port 2 "STMicroelectronics Biometric Coprocessor" rev 1.00/0.01 
addr 2
vscsi0 at root
scsibus2 at vscsi0: 256 targets
softraid0 at root
scsibus3 at softraid0: 256 targets
root on sd0a (0932913111ddd735.a) swap on sd0b dump on sd0b
sd1 at scsibus3 targ 1 lun 0: <OPENBSD, SR CRYPTO, 005> SCSI2 0/direct fixed
sd1: 267880MB, 512 bytes/sector, 548619249 sectors

thanks, ciao,

-- 
-- "Jonathan Thornburg [remove -animal to reply]" 
<jth...@astro.indiana-zebra.edu>
   Dept of Astronomy & IUCSS, Indiana University, Bloomington, Indiana, USA
   "Washing one's hands of the conflict between the powerful and the
    powerless means to side with the powerful, not to be neutral."
                                      -- quote by Freire / poster by Oxfam

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