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touchpad not fully functionnal

asked 2012-07-03 11:11:21 -0600

jsuhm gravatar image


I'm trying Fedora17 on a new Dell vostro 3360 and I have some issues.

The ALPS touchpad is only recognized as a simple PS2 mouse :

# xinput list
⎡ Virtual core pointer                          id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ PS/2 Generic Mouse                        id=13   [slave  pointer  (2)]

The result is very annoying:

  • no middle button emulation
  • no scroll
  • no advanced touchpad configuration (sensitivity, zones, actions etc ...)

Thanks in advance for any help / suggestion.

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answered 2012-07-04 20:08:42 -0600

whot gravatar image

If a touchpad is recognised as PS/2 Generic Mouse the problem lies with the kernel. Touchpads have an initialisation sequence that switches them from mouse emulation mode to true touchpad mode. The kernel is responsible for sending that sequence but it can only do so for touchpads it supports. Newer touchpads may have different sequences, leaving them in mouse emulation mode.

The XOrg synaptics driver requires the touchpad to be in touchpad mode, and that again enables all the configuration features in the client stacks (e.g. GNOME) that you're missing currently.

So if your touchpad registers as mouse only, please file a kernel bug (and try a newer kernel, it may have been fixed upstream since).

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Asked: 2012-07-03 11:11:21 -0600

Seen: 1,958 times

Last updated: Jul 04 '12