Ubuntu
linux package

  1. Bug #787738
  2. Comment #19

Comment 19 for bug 787738

Revision history for this message
In , pyther (pyther-linux-kernel-bugs) wrote :

Created attachment 54402
ls -l /dev/input

Hello.

I got a new Thinkpad E420s the otherday and have come across a odd problem.

This laptop has a touchpad and a trackpoint. Sometimes the trackpoint will be detected and sometimes it will not.

Distro: Arch Linux

When the trackpoint is detected:
*rmmod psmouse results in mouse0 and mouse2 disappearing (ls /dev/input). mouse1 = usb logitech mouse
*modprobe psmouse results in mouse0 (the trackpoint) being detected and created right away. However, it takes about 20 seconds for the trackpoint (mouse2) to be created.

When the trackpoint is NOT detected I simply have mouse0 (touchpad) and mouse1 (usb logitech mouse)

Work / Solution
*Reboot into Windows 7. Insure trackpoint works (always does). Reboot into Linux device is detected. In my tests it seems that the device stops getting detected after 6-8 reboots. However, I did also have the problem after resuming from suspend-to-ram.

Let me know what information I need to provide and any way that I can help.