I also can reproduce the bug 100% on my T410.
Looks it should be one new kernel feature, and someone[1] worked on it but not merged finally.
I have reported the bug onto upstream[2].
[1], https://lkml.org/lkml/2010/2/23/344 [2], http://marc.info/?l=linux-input&m=135047785511198&w=2
I also can reproduce the bug 100% on my T410.
Looks it should be one new kernel feature, and someone[1] worked on
it but not merged finally.
I have reported the bug onto upstream[2].
[1], https:/ /lkml.org/ lkml/2010/ 2/23/344 marc.info/ ?l=linux- input&m= 135047785511198 &w=2
[2], http://