Comment 13 for bug 1900254

I fetched a kernel from kernel.org (5.6.14 and 5.7.0-rc7).

make menuconfig

Device Drivers -> Input device support -> Touchscreens -> Elan eKTH I2C touchscreen -->> set to m

rebuild kernel and install...

The driver is no longer loaded as built in, but as a module. This leads to a delay of ca. 3-4s. Somehow this seems to help.

The Touchpad/screen is connected via i2c1.

dl3it@IdeaPad:~$ dmesg | grep ELAN
[ 1.583560] i2c_hid i2c-ELAN0001:00: supply vdd not found, using dummy regulator
[ 1.583575] i2c_hid i2c-ELAN0001:00: supply vddl not found, using dummy regulator
[ 1.646025] input: ELAN0001:00 04F3:3140 Mouse as /devices/platform/AMDI0010:01/i2c-1/i2c-ELAN0001:00/0018:04F3:3140.0001/input/input5
[ 1.646257] input: ELAN0001:00 04F3:3140 Touchpad as /devices/platform/AMDI0010:01/i2c-1/i2c-ELAN0001:00/0018:04F3:3140.0001/input/input6
[ 1.646347] hid-generic 0018:04F3:3140.0001: input,hidraw0: I2C HID v1.00 Mouse [ELAN0001:00 04F3:3140] on i2c-ELAN0001:00
[ 4.456207] input: ELAN0001:00 04F3:3140 Mouse as /devices/platform/AMDI0010:01/i2c-1/i2c-ELAN0001:00/0018:04F3:3140.0001/input/input8
[ 4.456459] input: ELAN0001:00 04F3:3140 Touchpad as /devices/platform/AMDI0010:01/i2c-1/i2c-ELAN0001:00/0018:04F3:3140.0001/input/input9
[ 4.456574] hid-multitouch 0018:04F3:3140.0001: input,hidraw0: I2C HID v1.00 Mouse [ELAN0001:00 04F3:3140] on i2c-ELAN0001:00

dl3it@IdeaPad:~$ xinput
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ ELAN0001:00 04F3:3140 Mouse id=11 [slave pointer (2)]
⎜ ↳ ELAN0001:00 04F3:3140 Touchpad id=12 [slave pointer (2)]
⎣ Virtual core keyboard id=3 [master keyboard (2)]
    ↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)]
    ↳ Power Button id=6 [slave keyboard (3)]
    ↳ Video Bus id=7 [slave keyboard (3)]
    ↳ Power Button id=8 [slave keyboard (3)]
    ↳ Integrated Camera: Integrated C id=9 [slave keyboard (3)]
    ↳ Ideapad extra buttons id=10 [slave keyboard (3)]
    ↳ AT Translated Set 2 keyboard id=13 [slave keyboard (3)]

libinput:

Device: ELAN0001:00 04F3:3140 Mouse
Kernel: /dev/input/event5
Group: 8
Seat: seat0, default
Capabilities: pointer
Tap-to-click: n/a
Tap-and-drag: n/a
Tap drag lock: n/a
Left-handed: disabled
Nat.scrolling: disabled
Middle emulation: n/a
Calibration: n/a
Scroll methods: *button
Click methods: none
Disable-w-typing: n/a
Accel profiles: flat *adaptive
Rotation: n/a

Device: ELAN0001:00 04F3:3140 Touchpad
Kernel: /dev/input/event6
Group: 8
Seat: seat0, default
Size: 100x66mm
Capabilities: pointer gesture
Tap-to-click: disabled
Tap-and-drag: enabled
Tap drag lock: disabled
Left-handed: disabled
Nat.scrolling: disabled
Middle emulation: disabled
Calibration: n/a
Scroll methods: *two-finger edge
Click methods: *button-areas clickfinger
Disable-w-typing: enabled
Accel profiles: none
Rotation: n/a

I'll add a dmesg and Xorg log...