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[Gabriele <1305522@xxxxxxxxxxxxxxxxxx>]

I'm not using Ubuntu nor the kernel here posted, but Debian sid with
kernel 3.16-rc*

I have the same problem reported in comment #78.
powertop reports a high number of events/s for DLL060A:00 and also INT33C3:00.

Doing what was suggested in #80, I got the following:

 irq/39-DLL060A:-315   [002] ....   643.869064: rmi_f30_input_event <-rmi_raw_event
 irq/39-DLL060A:-315   [002] ....   643.879318: rmi_raw_event <-hid_input_report
 irq/39-DLL060A:-315   [002] ....   643.879323: rmi_f11_input_event <-rmi_raw_event
 irq/39-DLL060A:-315   [002] ....   643.879327: rmi_f30_input_event <-rmi_raw_event
 irq/39-DLL060A:-315   [002] ....   643.889271: rmi_raw_event <-hid_input_report
 irq/39-DLL060A:-315   [002] ....   643.889275: rmi_f11_input_event <-rmi_raw_event
 irq/39-DLL060A:-315   [002] ....   643.889277: rmi_f30_input_event <-rmi_raw_event
 irq/39-DLL060A:-315   [002] ....   643.899350: rmi_raw_event <-hid_input_report
 irq/39-DLL060A:-315   [002] ....   643.899353: rmi_f11_input_event <-rmi_raw_event
 irq/39-DLL060A:-315   [002] ....   643.899356: rmi_f30_input_event <-rmi_raw_event

This is just a small part of what I get, the above lines are continuosly
generated at a constant rate even without touching the touchpad.

Right after a reboot those lines appears only when touching the
touchpad, but after some use, they are constantly generated.

After some tests I found that this happens once ABS_MT_TOUCH_MAJOR
reaches 12. I'm not sure of this, but I tried a few times already and
this is the only relation I could find.

Can anyone confirm this? Use 'evtest' to see the value of
ABS_MT_TOUCH_MAJOR.


I would also like to add that I think that the events are sent at a higher rate when compared to the old driver. I think this is causing a higher power consumpion when using the touchpad.

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https://bugs.launchpad.net/bugs/1305522

Title:
  Backport Synaptics HID touchpad driver for 14.04

Status in “linux” package in Ubuntu:
  Fix Released
Status in “linux” source package in Trusty:
  Fix Released

Bug description:
  Synaptics just upstreamed a new set of HID touchpad driver:

  http://git.kernel.org/cgit/linux/kernel/git/jikos/hid.git/commit/?h=for-3.16/rmi4&id=9fb6bf02e3ad04c20edb8e46536ce3eeda32c736

  It's better we can have it in 14.04 .

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