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Mismatch of TrackPoint buttons on ThinkPad T430
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yuri69
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Joined: 17 Apr 2017
Posts: 4
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PostPosted: Mon Apr 17, 2017 4:04 pm    Post subject: Mismatch of TrackPoint buttons on ThinkPad T430 Reply with quote

Howdy,
I got a Lenovo ThinkPad T430 which should be a quite common and supported laptop nowadays. I got a standard systemd & Gnome desktop installation.

My problem are the TrackPoint buttons - there is that rubber pointy thing + left; mid; right buttons just below the keyboard. First time I GDMed to Gnome I noticed these buttons acted weird. Firefox was unusable - closing tabs, duplicating tabs, etc. Gnome UI was responding via flicking when clicked an item.

I discovered that the issue is a mismatch in left and mid buttons. In xinput test the response on a single left button click:
Code:
button press 1
button press 1
button release 2
button release 2

OTOH, a 1sec long "click" with the same left button:
Code:
button press 1
button release 1

The same sequence with mid button is the same as with left button:
Code:
button press 1
button press 1
button release 2
button release 2


There is a mismatch in signaling the buttons.

I wanted to have the scrolling functionality with the TrackPoint so I used INPUT_DEVICES="libinput" first. Then I moved to classic INPUT_DEVICES="udev synaptics", no change though.

The only way I worked this around was disabling the mid button completely via:
Code:
xinput set-button-map 1 0 3 4 5 6 7

However, scrolling functionality is still broken, since the mid button keeps emitting a button press 1.

My uname -a:
Code:
Linux gentoo 4.4.39-gentoo #5 SMP Sun Apr 16 00:55:20 -00 2017 x86_64 Intel(R) Core(TM) i5-3320M CPU @ 2.60GHz GenuineIntel GNU/Linux[/quote]


My xorg.conf.d related file:
Code:
Section "InputClass"
        Identifier      "ThinkPad TrackPoint"
        Driver          "evdev"
        MatchProduct    "TPPS/2 IBM TrackPoint"
        MatchDevicePath "/dev/input/event*"
        Option          "EmulateWheel"          "true"
        Option          "EmulateWheelButton"    "2"
        Option          "XAxisMapping"          "6 7"
        Option          "YAxisMapping"          "4 5"
        Option          "ButtonMapping"         "1 0 3 4 5 6 7"
EndSection


What else should I investigate? I can provide dmesg, etc.

Thanks!
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