Re: support for some types of Asus+Elantech touchpads

[Dmitry Torokhov <dmitry.torokhov@gmail.com>]

Hi Wladimir,

On Tue, Dec 01, 2015 at 09:59:28PM +0200, Wladimir Mutel wrote:
> Dear Dmitry & linux-input members,
> 
> some new Asus (and probably non-Asus) laptops are shipped with a new
> kind of Elantech (not sure if only Elantech) touchpads which are not
> adequately handled by Linux kernel module (psmouse). First problem
> is that these touchpads are dying off (losing their sensitivity and
> response) when the system is put into pm-suspend and then waken up.
> Another problem is that on reload (modprobe -r ... && modprobe ...)
> of psmouse module they are dying off too, in 'dmesg' coming with
> some weird-numbered indexes (like, input5 on initial load and
> input292 on reload of psmouse).
> 
> There are some bugs reported in Ubuntu Launchpad on this topic
> (https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1519034 is my
> own, also
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1490130 ,
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1506363 ,
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1504445 and
> some others).
> Also there is a proposed patch at
> https://marc.info/?l=linux-input&m=144312209020616
> and one more report at
> http://www.spinics.net/lists/linux-input/msg41634.html
> 
> For me, these problems look related. I have Asus X302LA on which I
> am testing Ubuntu Xenial and whose touchpad exhibits this problem.
> If you need I could provide my assistance in testing psmouse module
> on this hardware. Thank you in advance for your response.

Does the noselftest patch help on your box (you'd have to adjust
i8042_dmi_noselftest_table with the DMI data for your laptop)?

Thanks.

-- 
Dmitry