[Asus T300 CHI] Synaptics Touch Digitizer V04 - no multitouch

[TJ]

This is a related but separate issue to bug #1480673 "Asus T300 CHI bluetooth Touchpad is recognized incorrectly".

Affecting this digitizer is also bug #1574028 "Asus T300 CHI: touchscreen digitiser missing at boot".

Using 16.04 amd64 Ubuntu (unity).

In this case the USB-attached "Synaptics Touch Digitizer V04" fails to provide any multitouch functionality.

'evtest' shows multitouch events happening.

$ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 007: ID 06cb:11ef Synaptics, Inc.
Bus 001 Device 005: ID 04f2:b3d5 Chicony Electronics Co., Ltd
Bus 001 Device 003: ID 8087:0a2a Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

~$ xinput --list
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ ASUS T300CHI DOCKING id=9 [slave pointer (2)]
⎜ ↳ SYNAPTICS Synaptics Touch Digitizer V04 id=11 [slave pointer (2)]
⎜ ↳ SYNAPTICS Synaptics Touch Digitizer V04 Pen 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)]
    ↳ Sleep Button id=8 [slave keyboard (3)]
    ↳ USB2.0 HD UVC WebCam id=10 [slave keyboard (3)]
    ↳ Asus WMI hotkeys id=13 [slave keyboard (3)]
    ↳ AT Translated Set 2 keyboard id=14 [slave keyboard (3)]
    ↳ ASUS T300CHI DOCKING id=15 [slave keyboard (3)]

$ ll /sys/bus/hid/drivers/hid-multitouch/
total 0
drwxr-xr-x 2 root root 0 Apr 24 18:12 ./
drwxr-xr-x 4 root root 0 Apr 24 18:12 ../
lrwxrwxrwx 1 root root 0 Apr 24 18:12 0003:06CB:11EF.0003 -> ../../../../devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.0/0003:06CB:11EF.0003/
--w------- 1 root root 4096 Apr 24 18:12 bind
lrwxrwxrwx 1 root root 0 Apr 24 18:12 module -> ../../../../module/hid_multitouch/
--w------- 1 root root 4096 Apr 24 18:12 new_id
--w------- 1 root root 4096 Apr 24 18:12 uevent
--w------- 1 root root 4096 Apr 24 18:12 unbind

[woodo (woodo100)]

this bug affects my asus t300 chi. Tried a bunch of things to no avail. I'll try to add the normally requested attachments. Any help appreciated.

[TJ (tj)]

Although most other issues are solved there is still no multitouch for this device with kernel v5.15 and xserver-xorg 1.20.13-1ubuntu1 using Kubuntu 21.10.

# xinput
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ Asus TouchPad id=10 [slave pointer (2)]
⎜ ↳ SYNAPTICS Synaptics Touch Digitizer V04 Mouse id=15 [slave pointer (2)]
⎜ ↳ SYNAPTICS Synaptics Touch Digitizer V04 id=16 [slave pointer (2)]
⎜ ↳ BT5.0 Mouse id=20 [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)]
    ↳ Asus Wireless Radio Control id=7 [slave keyboard (3)]
    ↳ Video Bus id=8 [slave keyboard (3)]
    ↳ Sleep Button id=9 [slave keyboard (3)]
    ↳ ASUS T300CHI DOCKING id=11 [slave keyboard (3)]
    ↳ ASUS T300CHI DOCKING id=12 [slave keyboard (3)]
    ↳ ASUS T300CHI DOCKING id=13 [slave keyboard (3)]
    ↳ USB2.0 HD UVC WebCam: USB2.0 HD id=14 [slave keyboard (3)]
    ↳ SYNAPTICS Synaptics Touch Digitizer V04 Stylus id=17 [slave keyboard (3)]
    ↳ Asus WMI hotkeys id=18 [slave keyboard (3)]
    ↳ AT Translated Set 2 keyboard id=19 [slave keyboard (3)]

# for id in {15..17}; do xinput --list $id; done
SYNAPTICS Synaptics Touch Digitizer V04 Mouse id=15 [slave pointer (2)]
 Reporting 7 classes:
  Class originated from: 15. Type: XIButtonClass
  Buttons supported: 7
  Button labels: "Button Left" "Button Middle" "Button Right" "Button Wheel Up" "Button Wheel Down" "Button Horiz Wheel Left" "Button Horiz Wheel Right"
  Button state:
  Class originated from: 15. Type: XIValuatorClass
  Detail for Valuator 0:
    Label: Rel X
    Range: -1.000000 - -1.000000
    Resolution: 0 units/m
    Mode: relative
  Class originated from: 15. Type: XIValuatorClass
  Detail for Valuator 1:
    Label: Rel Y
    Range: -1.000000 - -1.000000
    Resolution: 0 units/m
    Mode: relative
  Class originated from: 15. Type: XIValuatorClass
  Detail for Valuator 2:
    Label: Rel Horiz Scroll
    Range: -1.000000 - -1.000000
    Resolution: 0 units/m
    Mode: relative
  Class originated from: 15. Type: XIValuatorClass
  Detail for Valuator 3:
    Label: Rel Vert Scroll
    Range: -1.000000 - -1.000000
    Resolution: 0 units/m
    Mode: relative
  Class originated from: 15. Type: XIScrollClass
  Scroll info for Valuator 2
    type: 2 (horizontal)
    increment: 15.000000
    flags: 0x0
  Class originated from: 15. Type: XIScrollClass
  Scroll info for Valuator 3
    type: 1 (vertical)
    increment: 15.000000
    flags: 0x0

SYNAPTICS Synaptics Touch Digitizer V04 id=16 [slave pointer (2)]
 Reporting 6 classes:
  Class originated from: 16. Type: XIButtonClass
  Buttons supported: 7
  Button labels: "Button Left" "Button Middle" "Button Right" "Button Whee...