As I already mentioned in my previous post about the XPS 13, I had issues with the touchpad: it freezes rather frequently, because it looses sync a lot. After losing sync for a few times, the psmouse driver issues a reconnect request. And when that happens, the touchpad freezes. It looks like this in the kernel log:

Jul 26 15:43:19 sylvester kernel: psmouse serio1: TouchPad at isa0060/serio1/input0 lost sync at byte 4
Jul 26 15:43:19 sylvester kernel: psmouse serio1: TouchPad at isa0060/serio1/input0 lost sync at byte 1
Jul 26 15:43:19 sylvester kernel: psmouse serio1: TouchPad at isa0060/serio1/input0 lost sync at byte 1
Jul 26 15:43:19 sylvester kernel: psmouse serio1: TouchPad at isa0060/serio1/input0 lost sync at byte 1
Jul 26 15:43:19 sylvester kernel: psmouse serio1: TouchPad at isa0060/serio1/input0 lost sync at byte 1
Jul 26 15:43:19 sylvester kernel: psmouse serio1: issuing reconnect request