kernel-packages team mailing list archive

[Kamal Mostafa <kamal@xxxxxxxxxxxxx>]

Kent Baxley's analysis in comment #18 is correct.  Some (but not all)
models of Dell XPS13 contain the Synaptics touchpad affected by this
problem.

Until a newer Synaptics i2c driver becomes available, the recommended
solution for Ubuntu 14.04 (Trusty) is to blacklist the i2c_hid driver,
which will return the Synaptics touchpad to full functionality.

To test whether this workaround will affect you, run the 'xinput'
command.  If the output contains a "DLL060A:00 ..." line (indicating
that it has been detected by the i2c_hid driver), then you may need this
workaround.

To apply the workaround, run the following command:

    $ echo "blacklist i2c_hid" | sudo tee -a
/etc/modprobe.d/blacklist.conf

... and then reboot your system.  The 'xinput' command should now show a
"SynPS/2" line instead of the "DLL060A:00" line, and full touchpad
functionality should be restored.

-- 
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Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1265885

Title:
  regression: SynPS/2 touchpad detected as DLL060A:00 pointer

Status in “linux” package in Ubuntu:
  Triaged

Bug description:
  This regression occurs somewhere between 3.11.0-14-generic (latest on
  saucy) and 3.13.0-031300rc6-generic (a test kernel). On the earlier
  kernel, I actually  get settings for setting up my touchpad in the
  unity interface. With the updated kernel, those options disappear. I
  only get one set of options both my mouse and my touchpad instead of
  each one independently. It means that I can't set the pointer speed
  differently or turn on natural scrolling for my touchpad.

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