On Wed, Sep 15, 2021 at 12:24:32PM -0500, Roger Heflin wrote:
On any given reboot/login/logout the id= can and will change. The
scanning order/process should be the same, but if all devices are
asked in parallel tiny timing differences in how each answers can
change the order.
You generally need code first to find the current ID for the given
named device, and then use that id.
Agreed!!
I have a Dell laptop with a Synaptic trackpad that I never use.
I wrote a script to show or change the on/off status. Started with
hard coded id that worked well for a time, but had to recode it to
discover the id when I found it was not stable.
Also, the same trackpad shows up twice with "xinput -list". Once as
"Dell" trackpad and again as "Synaptic" trackpad. Different id's.
Jon
On Wed, Sep 15, 2021 at 6:03 AM Sam Varshavchik <mrsam@xxxxxxxxxxxxxxx> wrote:
Ed Greshko writes:
> On 15/09/2021 07:59, Sam Varshavchik wrote:
>> This almost feels like a ritual that I go through every 3-4 years: figure
>> out how to disable the laptop's obnoxious touchpad from registering phantom
>> tap clicks.
>>
>> This time around Google claims XFCE's "Mouse and Touchpad" settings has a
>> checkbox for that. Google also gives instructions for using synclient, which
>> appears to be obsolete.
>>
>> So, what's the right procedure for this (this year)?
>
> I don't have laptop or touch pad.
>
> But I thought that xinput was the command of choice to deal with things like
> this. Sounds like your sensitivity may
> be too high?
>
> https://askubuntu.com/questions/483707/14-04-touchpad-is-too-sensitive
>
> May be of value?
I saw that. And something's weird is going on with this thing.
Yesterday, before I tried to disable tapping I wanted to get the middle
button emulation to work.
"xinput list" told me that device "id=12" was something called "PS/2 wheeled
mouse", and it offered a setting called "libinput Middle Emulation Enabled".
xinput set-prop 12 'libinput Middle Emulation Enabled' 1
did what I wanted, and made both touchpad buttons emulate a middle button
click.
I know I wasn't imagining this because I saved this command in the XFCE
session manager to run at login.
I hunted around, and I saw nothing about disabling tap to click, so I gave
up and went to sleep.
So, after reading your message, this morning I went back in. For some
inexplicable reason:
1) xinput now tells me that id=12 is an "ETPS/2 Elantech Touchpad"
2) This device does not have a 'libinput Middle Emulation Enabled' setting,
and the command that I saved to run at session startup simply reports an
error. The touchpad emulates the middle button click without this setting.
3) The touchpad no longer responds to taps, so the only thing for me to do
is remove the session startup command, that no longer does anything.
I did not install any updates since yesterday. I'm fairly certain I'm using
the same laptop today, that I used yesterday.
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