Bug#509338: NULL pointer dereference in psmouse

[Jonathan Nieder <jrnieder@gmail.com>]

retitle 509338 Thinkpad T400: mouse pointer gets temporarily stuck ("input0 lost sync at byte 1"; "issuing reconnect request")
forwarded 509338 https://bugzilla.kernel.org/show_bug.cgi?id=8740
quit

Joachim Breitner wrote:

> nothing seems to have change since 2010: I don’t see a
> NULL-pointer-dereference, but when both touchpad and trackpoint are
> enabled, the pointer sometimes gets stuck for a short while while dmesg
> tells me:
>
> [   55.444165] psmouse serio1: TouchPad at isa0060/serio1/input0 lost sync at byte 1
> [   55.446370] psmouse serio1: TouchPad at isa0060/serio1/input0 lost sync at byte 1
> [   55.448494] psmouse serio1: TouchPad at isa0060/serio1/input0 lost sync at byte 1
> [   76.420802] psmouse serio1: TouchPad at isa0060/serio1/input0 lost sync at byte 1
> [   76.423256] psmouse serio1: TouchPad at isa0060/serio1/input0 lost sync at byte 1
> [   76.423258] psmouse serio1: issuing reconnect request
> [  389.906979] psmouse serio1: TouchPad at isa0060/serio1/input0 lost sync at byte 1

Thanks.  Let's recycle this bug to track that.

Do you remember when the NULL pointer dereference went away?  (E.g.,
does the 2.6.32.y kernel from squeeze reproduce it?  A squeeze kernel
should work fine on a wheezy/sid system.)