ALPS psmouse_reset on reconnect confusing Tecra M2

[Mike Waychison <mike@waychison.com>]

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Hi,

I just upgrade my Tecra M2 this weekend to the latest GIT tree and
noticed that my mouse pointer/touchpad is now broken on resume.

Investigating, it appears that mouse device gets confused due to the
introduced psmouse_reset(psmouse) during reconnect:

http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3a5c73d5ecb40909db662c4d2ace497b25c5940

Before resume, this is the output I get:

Jul  3 01:25:11 lapdance kernel: alps.c: E6 report: 00 00 64
Jul  3 01:25:11 lapdance kernel: alps.c: E7 report: 22 02 14
Jul  3 01:25:11 lapdance kernel: alps.c: E6 report: 00 00 64
Jul  3 01:25:11 lapdance kernel: alps.c: E7 report: 22 02 14
Jul  3 01:25:12 lapdance kernel: alps.c: Status: 05 01 0a
Jul  3 01:25:12 lapdance kernel: alps.c: Enabling hardware tapping
Jul  3 01:25:12 lapdance kernel: alps.c: Status: 05 01 0a
Jul  3 01:25:12 lapdance kernel: input: DualPoint Stick on isa0060/serio1
Jul  3 01:25:12 lapdance kernel: input: AlpsPS/2 ALPS DualPoint TouchPad
on isa0060/serio1

If I then suspend and resume:

Jul  3 01:26:13 lapdance kernel: alps.c: E6 report: 00 00 64
Jul  3 01:26:13 lapdance kernel: alps.c: E7 report: 73 02 0a
Jul  3 01:26:14 lapdance kernel: alps.c: E6 report: 00 00 64
Jul  3 01:26:14 lapdance kernel: alps.c: E7 report: 73 02 0a
Jul  3 01:26:14 lapdance kernel: alps.c: Status: 15 01 0a
Jul  3 01:26:14 lapdance kernel: alps.c: Enabling hardware tapping
Jul  3 01:26:14 lapdance kernel: alps.c: Status: 15 01 0a
Jul  3 01:26:14 lapdance kernel: input: PS/2 Mouse on isa0060/serio1
Jul  3 01:26:14 lapdance kernel: input: AlpsPS/2 ALPS GlidePoint on
isa0060/serio1

The pointer is confused, and a hard shutdown and boot is required to
restore it.  A reboot alone won't do the trick.

FWIW, I was using the regular IMPS/2 X mouse driver, though I later
tried using the synaptics X driver and that didn't work either.

Other things I've tried include trying psmouse_reset until it returns
successfully, though sometimes it did, and other times it didn't, even
after 100 retries.  In either case the pointer didn't come back.

Removing the psmouse_reset makes the pointer come back properly 100% of
the time.

Are you sure that the psmouse_reset is really the right thing to do?

(worked fine in 2.6.11-rc2).

Thanks,

Mike Waychison
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