Ubuntu
linux package

  1. Bug #1258837
  2. Comment #5

Comment 5 for bug 1258837

Revision history for this message
Jeffrey Knockel (jeff250) wrote : Re: Dell Latitude E7440 ALPS touchpad keeps having state reset

This sync issue with the E7440 touchpad can cause spurious clicks too.

One thing that I found helps is to add psmouse.resetafter=1 to GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub (and then run update-grub and reboot).

This will cause the driver to reset when it loses sync, causing the touchpad to stop working for a few moments, but typically avoiding spurious movement and clicking. This will also cause your dmesg logs to look like this instead:

[ 2571.411451] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 lost sync at byte 1
[ 2571.411456] psmouse serio1: issuing reconnect request
[ 6112.042246] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 lost sync at byte 1
[ 6112.042260] psmouse serio1: issuing reconnect request
. . .