media-keys: Add support for XF86TouchpadOn/Off

[zhangxianwei8]

Using hard-coded keys.

This requires new keycodes added to X.org in: https://bugs.freedesktop.org/show_bug.cgi?id=31300

Ported from gnome-settings-daemon: https://github.com/GNOME/gnome-settings-daemon/commit/1c8f64d1dc6beb7d27a6dce74fa29e27e8c34583

[raveit65]

Which version of xorg server does have this code?

[lukefromdc]

I don't think my laptop has a key for this, and desktops don't have touchpads so someone else will need to test this

[raveit65]

I have a touchpad , np. The question is more if all distros use this needed Xorg version. Commit is from 2017. I am sure we need to add a condition for this.

[zhangxianwei8]

Which version of xorg server does have this code?

See the patch https://cgit.freedesktop.org/xorg/proto/x11proto/commit/?id=5d3428de974d15357b0ad407f4c5222cfaa8f9f3, which merged very early.

I have tested on Lenovo E43 laptop, which has a touchpad Functional key(F6). @raveit65 @lukefromdc

[raveit65]

I see gnome commit is from 2010, so it is save to use.

[raveit65]

Which keyboard key are you using to enable/disable touchpad?

[zhangxianwei8]

The keyboard key is F6.

[zhangxianwei8]

Looking at this:

[lukefromdc]

On converted Chromebooks you don't get the normal functions keys, and some but not all of the keys marked to do various functions in Chrome in fact seem to operate ONLY as function keys. At least this is what I've gotten with a sample size of one machine. Just getting rid of ChromeOS (all the way rid of it) and Debian Unstable installed was hard enough.

[zhangxianwei8]

Not all laptops have this key. This PR just fixes those have disable/enable touchpad hotkey.

'xev' command catches input event: KeyRelease event, serial 34, synthetic NO, window 0x2200001, root 0x18e, subw 0x0, time 16014751, (640,472), root:(646,557), state 0x0, keycode 201 (keysym 0x1008ffb1, XF86TouchpadOff), same_screen YES, XLookupString gives 0 bytes: XFilterEvent returns: False

KeyPress event, serial 37, synthetic NO, window 0x2200001, root 0x18e, subw 0x0, time 16016039, (640,472), root:(646,557), state 0x0, keycode 200 (keysym 0x1008ffb0, XF86TouchpadOn), same_screen YES, XLookupString gives 0 bytes: XmbLookupString gives 0 bytes: XFilterEvent returns: False

Then mate-settings-daemon handles it to display OSD, tested on Fedora29 beta:

[raveit65]

Thank you

[AnterCreeper]

Help! Also the key is worked, the OSD displayed, but the function doesn't work. at Debian 11 bullseye But, touchpad can be toggled through dconf write /org/mate/desktop/peripherals/touchpad/touchpad-enabled true/false