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For the Lenovo Ideapad Flex 5 14ARE05, no known workaround, but I would try to add to the kernel cmdline "i8042.reset=1" per the description in https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.8/+bug/1912880 that forced shutdown while suspend get the touchpad back (though I use such i8042 reset on my Lenovo Thinkpad Yoga S1 to fix the opposite ie no keyboard/touchpad after a force shutdown while suspended, it is worth a try. I have used this hack since it was reported ).

You might also want to try "i8042.nopnp=1" as the dmesg log from the above report tells:

[ 0.602905] i8042: PNP: PS/2 appears to have AUX port disabled, if this is incorrect please boot with i8042.nopnp
You could also try i8042.nomux=1 then i8042.kbreset=1

You might also want to report the bug to the Linux kernel ML or bugzilla https://bugzilla.kernel.org/. You might want to post your dmesg output or at least: sudo dmesg|grep -E "PS\/2|ACPI|hid|i8042"

For the Lenovo IdeaPad 5 15are05, IdeaPad 5 15are05 - elan touchpad not working on 20.04 nor on 18.04

modprobe i2c_hid echo "i2c-ELAN0001:00" > /sys/bus/i2c/drivers/elants_i2c/unbind echo "i2c-ELAN0001:00" > /sys/bus/i2c/drivers/i2c_hid/bind or add initcall_blacklist=elants_i2c_driver_init to your kernel cmdline (GRUB_CMDLINE_LINUX="" in /etc/default/grub (2020 might be fixed upstream)

For the Lenovo IdeaPad 3 14IIL05, https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe/+bug/1880172/comments/53, that is:

adding the following arguments to GRUB_CMDLINE_LINUX_DEFAULT.

"i8042.nopnp=1 pci=nocrs" (2020)

@SO_32 you might want to try without pci=nocrs. i8042 parameters ought not to affect wifi devices on its own.

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edited Mar 11 at 18:52
answered Oct 10, 2023 at 4:17

Alban Browaeys

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touchpack
Bus 004 Device 002: ID 1bfd:1688 TouchPack Resistive Touch Screen
ASUS ET1611PUT

---------------------

root@m-touch01:/home/mrak# cat /etc/udev/hwdb.d/61-evdev-local.hwdb 
# Define properties for touchapach touch screen device solve issue with:
# libinput bug: missing tablet capabilities: resolution. Ignoring this device.

# touchpack from asus allinone pc
evdev:input:b0003v1BFDp1688*
 EVDEV_ABS_00=0:4060:10
 EVDEV_ABS_01=110:4096:10

-------------

# show values
input-events -g 2

# reinit hwdb
systemd-hwdb update
udevadm trigger /dev/input/event2
pkill Xorg