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I have a Dell Venue Pro 7140 with the keyboard/trackpad/extra battery
dock. PopOS 20.04 fully updated. I have experienced this bug on stock
Ubuntu 20.04 as well as Kubuntu 20.04.
When at the login page, the trackpad and keyboard operate as they
should. Once the login process is complete and the desktop is
displayed, the keyboard still works as expected but the trackpad no
longer controls the pointer. The touch display still functions as
expected but the trackpad on the keyboard dock doesn't work.
The attached document is my device list, here is the evtest:
Input driver version is 1.0.1
Input device ID: bus 0x3 vendor 0x6cb product 0x2819 version 0x111
Input device name: "Synaptics T Pad V 01.31 Touchpad"
Supported events:
Event type 0 (EV_SYN)
Event type 1 (EV_KEY)
Event code 272 (BTN_LEFT)
Event code 325 (BTN_TOOL_FINGER)
Event code 330 (BTN_TOUCH)
Event code 333 (BTN_TOOL_DOUBLETAP)
Event code 334 (BTN_TOOL_TRIPLETAP)
Event type 3 (EV_ABS)
Event code 0 (ABS_X)
Value 483
Min 0
Max 1056
Resolution 12
Event code 1 (ABS_Y)
Value 266
Min 0
Max 516
Resolution 12
Event code 47 (ABS_MT_SLOT)
Value 0
Min 0
Max 2
Event code 53 (ABS_MT_POSITION_X)
Value 0
Min 0
Max 1056
Resolution 12
Event code 54 (ABS_MT_POSITION_Y)
Value 0
Min 0
Max 516
Resolution 12
Event code 55 (ABS_MT_TOOL_TYPE)
Value 0
Min 0
Max 2
Event code 57 (ABS_MT_TRACKING_ID)
Value 0
Min 0
Max 65535
Event type 4 (EV_MSC)
Event code 5 (MSC_TIMESTAMP)
Properties:
Property type 0 (INPUT_PROP_POINTER)
Property type 2 (INPUT_PROP_BUTTONPAD)
Testing ... (interrupt to exit)
I did try to remove xserver-xorg-input-synaptics, but it is not
installed on 20.04.
There is still an issue with Wayland and the trackpad, but it's
different than Xorg so the problem may be in how Xorg is processing the
trackpad (I honestly don't know) - in Wayland, it will work until I
attempt to run the sofware center.
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Tags: bot-comment
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Synaptic Trackpad works until actually logged into Xorg desktop
https://bugs.launchpad.net/bugs/1877655
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