You might want to try passing the various i8042 controller module linux parameters (i8042.nomux=1, i8042.kbdreset=1, i8042.reset=1) and also i8042.nopnp as told by your dmesg:
[ 0.602905] i8042: PNP: PS/2 appears to have AUX port disabled, if this is incorrect please boot with i8042.nopnp note that the AUX port is the mouse. You can set then via grub by setting GRUB_CMDLINE_LINUX="<your parameters>" in /etc/default/grub and running update-grub as root. Or plain edit enter then in the grub editor at boot. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-signed-hwe-5.8 in Ubuntu. https://bugs.launchpad.net/bugs/1912880 Title: Touchpad (MSFT) not detected on Lenovo Ideapad Flex 5 AMD Status in linux-signed-hwe-5.8 package in Ubuntu: Confirmed Bug description: The Laptop is an Ideapad Flex 5 14ARE05 Model 81X2 My touchpad is not recognized at all in xinput or libinput list-devices. There are however some lines mentioned in dmesg about MSFT, Mouse and PS/2 which I think is the touchpad. [ 0.004374] ACPI: SSDT 0x00000000C968F000 007216 (v02 LENOVO AmdTable 00000002 MSFT 04000000) [ 1.009575] i2c_hid i2c-MSFT0001:00: supply vdd not found, using dummy regulator [ 1.009599] i2c_hid i2c-MSFT0001:00: supply vddl not found, using dummy regulator [ 1.010058] i2c_hid i2c-MSFT0001:00: hid_descr_cmd failed [ 0.910718] hid-generic 0018:056A:5214.0001: input,hidraw0: I2C HID v1.00 Mouse [WACF2200:00 056A:5214] on i2c-WACF2200:00 [ 0.602905] i8042: PNP: PS/2 Controller [PNP0303:KBD0] at 0x60,0x64 irq 1 [ 0.602905] i8042: PNP: PS/2 appears to have AUX port disabled, if this is incorrect please boot with i8042.nopnp [ 0.604083] mousedev: PS/2 mouse device common for all mice The touchpad is an MSFT0001:00: The spec sheet for the laptop mentiones: "Buttonless Mylar® surface multi-touch touchpad" ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-5.8.0-40-generic 5.8.0-40.45~20.04.1 ProcVersionSignature: Ubuntu 5.8.0-40.45~20.04.1-generic 5.8.18 Uname: Linux 5.8.0-40-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.14 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Sat Jan 23 09:19:23 2021 InstallationDate: Installed on 2021-01-06 (16 days ago) InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731) SourcePackage: linux-signed-hwe-5.8 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.8/+bug/1912880/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
