Public bug reported:
The touchpad on the lenovo yoga slim-7i laptop is detected randomly and
doesn't seem to be detected every time the pc is booted. Even if it is
detected the touchpad doesn't work every time. However the external
mouse works just fine. I have also tried other ubuntu 18.04 and have
also tried upgrading the kernel to 5.8.16
$ lsb_release -rd
Description: Ubuntu 20.10
Release: 20.10
The xinput command gives the following output
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ 2.4G Mouse id=11 [slave pointer (2)]
⎜ ↳ SYNA2B5A:00 06CB:CDB0 Mouse id=17 [slave pointer (2)]
⎜ ↳ SYNA2B5A:00 06CB:CDB0 Touchpad id=18 [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)]
↳ Video Bus id=8 [slave keyboard (3)]
↳ Power Button id=9 [slave keyboard (3)]
↳ Sleep Button id=10 [slave keyboard (3)]
↳ Ideapad extra buttons id=12 [slave keyboard (3)]
↳ Intel HID events id=13 [slave keyboard (3)]
↳ AT Translated Set 2 keyboard id=14 [slave keyboard (3)]
↳ Integrated Camera: Integrated I id=15 [slave keyboard (3)]
↳ Integrated Camera: Integrated C id=16 [slave keyboard (3)]
and the details of /proc/bus/input/devices are
(only the relevant details)
I: Bus=0018 Vendor=06cb Product=cdb0 Version=0100
N: Name="SYNA2B5A:00 06CB:CDB0 Mouse"
P: Phys=i2c-SYNA2B5A:00
S:
Sysfs=/devices/pci0000:00/0000:00:15.1/i2c_designware.1/i2c-2/i2c-SYNA2B5A:00/0018:06CB:CDB0.0001/input/input21
U: Uniq=
H: Handlers=mouse1 event18
B: PROP=0
B: EV=17
B: KEY=30000 0 0 0 0
B: REL=3
B: MSC=10
I: Bus=0018 Vendor=06cb Product=cdb0 Version=0100
N: Name="SYNA2B5A:00 06CB:CDB0 Touchpad"
P: Phys=i2c-SYNA2B5A:00
S:
Sysfs=/devices/pci0000:00/0000:00:15.1/i2c_designware.1/i2c-2/i2c-SYNA2B5A:00/0018:06CB:CDB0.0001/input/input22
U: Uniq=
H: Handlers=mouse2 event19
B: PROP=5
B: EV=1b
B: KEY=e520 10000 0 0 0 0
B: ABS=2e0800000000003
B: MSC=20
** Affects: linux-signed-hwe (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1901421
Title:
Touchpad isn't detected everytime
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