Re: [PATCH 2/9] Input: atmel_mxt_ts - use deep sleep mode when stopped

[Nick Dyer <nick.dyer@itdev.co.uk>]

On 10/08/15 21:11, Benjamin Tissoires wrote:
> I am currently running v4.2-rc6, merged with Dmitry's and Jiri's tree.
> This patch completely kills my touchpad on the Pixel 2. No touch
> information is sent while the physical button still emits values. You
> said that you tested it on this laptop too, so I wonder why mine
> refuses to work.

I'm just building that version to see if I can reproduce. Dmitry made some
minor changes when he merged it, but I don't think it should have affected
anything.

Are you able to send me some dmesg output with dyndbg=+pt enabled?

It would also be useful if you could compile mxt-app and try issuing a
calibrate or reset command to see if that restores touch (let me know if
you need instructions).

> It looks also that the deep sleep gets kept while rebooting a
> different kernel. If I reboot to the standard fedora kernel (without
> this patch), I still have the same problem, and I have to reboot under
> ChromeOS to get the touchpad back alive. Then, the Fedora kernel works
> just fine.

That's unfortunate. In an ideal world the Fedora kernel driver should
reset the touch controller or at least check the power settings, and it
appears it's doing neither.