[PATCH libinput 3/3] udev: Decrease high pressure value for Elantech touchpads

[Peter Hutterer]

On Fri, Apr 21, 2017 at 01:31:58PM +0200, Paul Kocialkowski wrote:
> The high pressure value for Elantech touchpads (both PS/2 and I2C) is
> not adapted to various devices, on which the touchpad is barely usable.
> 
> Decreasing the high value makes those devices usable again, while not
> introducing any major drawback for other devices.

that's not quite true, is it? Bug 99975 which is the source for the 24/10
(yes, I had a copy/paste in the pressure patch, this should be 24:10, not
24:8, I've fixed this locally) had the user specifically set this. Anything
lower is likely to introduce ghost touches again. I'm ok to reduce this to
10:8 generically (synaptics used 1:1) but this should be added with a
hw-specific setting for that machine in bug 99975.

Cheers,
   Peter

> 
> Signed-off-by: Paul Kocialkowski <contact at paulk.fr>
> ---
>  udev/90-libinput-model-quirks.hwdb | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/udev/90-libinput-model-quirks.hwdb b/udev/90-libinput-model-quirks.hwdb
> index a78b5a9..0487165 100644
> --- a/udev/90-libinput-model-quirks.hwdb
> +++ b/udev/90-libinput-model-quirks.hwdb
> @@ -88,12 +88,12 @@ libinput:name:* Touchpad:dmi:*svnDellInc.:*
>  ##########################################
>  libinput:name:*ETPS/2 Elantech Touchpad*:dmi:*
>   LIBINPUT_ATTR_RESOLUTION_HINT=31x31
> - LIBINPUT_ATTR_PRESSURE_RANGE=24:8
> + LIBINPUT_ATTR_PRESSURE_RANGE=10:8
>   LIBINPUT_MODEL_ELANTECH_TOUCHPAD=1

>  libinput:name:*Elan Touchpad*
>   LIBINPUT_MODEL_ELANTECH_TOUCHPAD=1
> - LIBINPUT_ATTR_PRESSURE_RANGE=24:8
> + LIBINPUT_ATTR_PRESSURE_RANGE=10:8


related: looks like we can drop the ELANTECH_TOUCHPAD flag, it's write-only
now that we have the atttribute.

Cheers,
   Peter

 
>  ##########################################
>  # Google
> -- 
> 2.12.2
>