Lenovo Flex 5 14ARE05 81x2 - Touchpad issues

Hey all, I'm having issues with my new laptop and I'd really appreciate some help.

I'm trying to get the touchpad to work, but nothing seems to help. It works under Windows 10, but I'd really prefer using Ubuntu, or any other linux distro.

I initially started with kernel 5.8, but I also tried 5.9 and now I'm on mainline 5.12rc5.

I'm guessing this is a kernel issue since it's not showing up under devices at all. Here's the devices:

heretic@pc:~$ cat /proc/bus/input/devices
I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=PNP0C0C/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input0
U: Uniq=
H: Handlers=kbd event0
B: PROP=0
B: EV=3
B: KEY=10000000000000 0

I: Bus=0019 Vendor=0000 Product=0005 Version=0000
N: Name="Lid Switch"
P: Phys=PNP0C0D/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0D:00/input/input1
U: Uniq=
H: Handlers=event1
B: PROP=0
B: EV=21
B: SW=1

I: Bus=0019 Vendor=0000 Product=0003 Version=0000
N: Name="Sleep Button"
P: Phys=PNP0C0E/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0E:00/input/input2
U: Uniq=
H: Handlers=kbd event2
B: PROP=0
B: EV=3
B: KEY=4000 0 0

I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=LNXPWRBN/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXPWRBN:00/input/input3
U: Uniq=
H: Handlers=kbd event3
B: PROP=0
B: EV=3
B: KEY=10000000000000 0

I: Bus=0011 Vendor=0001 Product=0001 Version=ab41
N: Name="AT Translated Set 2 keyboard"
P: Phys=isa0060/serio0/input0
S: Sysfs=/devices/platform/i8042/serio0/input/input4
U: Uniq=
H: Handlers=sysrq kbd event4 leds
B: PROP=0
B: EV=120013
B: KEY=402000000 3803078f800d001 feffffdfffefffff fffffffffffffffe
B: MSC=10
B: LED=7

I: Bus=0019 Vendor=0000 Product=0006 Version=0000
N: Name="Video Bus"
P: Phys=LNXVIDEO/video/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:10/LNXVIDEO:00/input/input5
U: Uniq=
H: Handlers=kbd event5
B: PROP=0
B: EV=3
B: KEY=3e000b00000000 0 0 0

I: Bus=0018 Vendor=056a Product=5218 Version=0100
N: Name="Wacom HID 5218 Pen"
P: Phys=i2c-WACF2200:00
S: Sysfs=/devices/platform/AMDI0010:00/i2c-0/i2c-WACF2200:00/0018:056A:5218.0002/input/input11
U: Uniq=
H: Handlers=mouse0 event6
B: PROP=2
B: EV=1b
B: KEY=1e03 0 0 0 0 0
B: ABS=1000d000003
B: MSC=1

I: Bus=0018 Vendor=056a Product=5218 Version=0100
N: Name="Wacom HID 5218 Finger"
P: Phys=i2c-WACF2200:00
S: Sysfs=/devices/platform/AMDI0010:00/i2c-0/i2c-WACF2200:00/0018:056A:5218.0002/input/input12
U: Uniq=
H: Handlers=mouse1 event7
B: PROP=2
B: EV=b
B: KEY=400 0 0 0 0 0
B: ABS=260800000000003

I: Bus=0019 Vendor=0000 Product=0000 Version=0000
N: Name="Ideapad extra buttons"
P: Phys=ideapad/input0
S: Sysfs=/devices/pci0000:00/0000:00:14.3/PNP0C09:00/VPC2004:00/input/input14
U: Uniq=
H: Handlers=rfkill kbd event8
B: PROP=0
B: EV=13
B: KEY=81000800100c03 4400000000300000 0 2
B: MSC=10

I: Bus=0003 Vendor=5986 Product=212a Version=5614
N: Name="Integrated Camera: Integrated C"
P: Phys=usb-0000:04:00.3-4/button
S: Sysfs=/devices/pci0000:00/0000:00:08.1/0000:04:00.3/usb1/1-4/1-4:1.0/input/input15
U: Uniq=
H: Handlers=kbd event9
B: PROP=0
B: EV=3
B: KEY=100000 0 0 0

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HD-Audio Generic HDMI/DP,pcm=3"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:08.1/0000:04:00.1/sound/card0/input16
U: Uniq=
H: Handlers=event10
B: PROP=0
B: EV=21
B: SW=140

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HD-Audio Generic Mic"
P: Phys=ALSA
S:

Sysfs=/devices/pci0000:00/0000:00:08.1/0000:04:00.6/sound/card1/input17
U: Uniq=
H: Handlers=event11
B: PROP=0
B: EV=21
B: SW=10

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HD-Audio Generic Headphone"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:08.1/0000:04:00.6/sound/card1/input18
U: Uniq=
H: Handlers=event12
B: PROP=0
B: EV=21
B: SW=4


$ uname -r
5.12.0-051200rc5-generic

xinput also doesn't show it.

​

It looks like the device is i2c-MSFT0001:00.

I'm getting this in dmesg:


0.004766 ACPI: SSDT 0x00000000C968F000 007216 (v02 LENOVO AmdTable 00000002 MSFT 04000000)
0.651373 i2chidacpi i2c-MSFT0001:00: hiddescrcmd failed
0.651396 i2chidacpi i2c-MSFT0001:00: Failed to fetch the HID Denoscriptor

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