Touchpad not working on ASUS TUF F15 (2021 edition)

I am using Kubuntu 21.04 on my ASUS TUF F15 FX506HM_FX566HM. The touchpad isn't detected in Settings and neither in xinput. Output of xinput

⎡ Virtual core pointer                          id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎣ Virtual core keyboard                         id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
    ↳ Asus Wireless Radio Control               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)]
    ↳ USB2.0 HD UVC WebCam: USB2.0 HD           id=11   [slave  keyboard (3)]
    ↳ Intel HID events                          id=12   [slave  keyboard (3)]
    ↳ Intel HID 5 button array                  id=13   [slave  keyboard (3)]
    ↳ Asus WMI hotkeys                          id=14   [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard              id=15   [slave  keyboard (3)]

Output of lspci

0000:00:00.0 Host bridge: Intel Corporation 11th Gen Core Processor Host Bridge/DRAM Registers (rev 05)
0000:00:01.0 PCI bridge: Intel Corporation 11th Gen Core Processor PCIe Controller #1 (rev 05)
0000:00:02.0 VGA compatible controller: Intel Corporation TigerLake-LP GT2 [Iris Xe Graphics] (rev 01)
0000:00:04.0 Signal processing controller: Intel Corporation TigerLake-LP Dynamic Tuning Processor Participant (rev 05)
0000:00:06.0 System peripheral: Intel Corporation Device 09ab
0000:00:07.0 PCI bridge: Intel Corporation Tiger Lake-H Thunderbolt 4 PCI Express Root Port #0 (rev 05)
0000:00:08.0 System peripheral: Intel Corporation GNA Scoring Accelerator module (rev 05)
0000:00:0a.0 Signal processing controller: Intel Corporation Tigerlake Telemetry Aggregator Driver (rev 01)
0000:00:0d.0 USB controller: Intel Corporation Tiger Lake-H Thunderbolt 4 USB Controller (rev 05)
0000:00:0d.2 USB controller: Intel Corporation Tiger Lake-H Thunderbolt 4 NHI #0 (rev 05)
0000:00:0e.0 RAID bus controller: Intel Corporation Volume Management Device NVMe RAID Controller
0000:00:14.0 USB controller: Intel Corporation Tiger Lake-H USB 3.2 Gen 2x1 xHCI Host Controller (rev 11)
0000:00:14.2 RAM memory: Intel Corporation Tiger Lake-H Shared SRAM (rev 11)
0000:00:15.0 Serial bus controller [0c80]: Intel Corporation Tiger Lake-H Serial IO I2C Controller #0 (rev 11)
0000:00:16.0 Communication controller: Intel Corporation Tiger Lake-H Management Engine Interface (rev 11)
0000:00:1c.0 PCI bridge: Intel Corporation Device 43bf (rev 11)
0000:00:1d.0 PCI bridge: Intel Corporation Device 43b6 (rev 11)
0000:00:1f.0 ISA bridge: Intel Corporation Tiger Lake-H LPC/eSPI Controller (rev 11)
0000:00:1f.3 Audio device: Intel Corporation Tiger Lake-H HD Audio Controller (rev 11)
0000:00:1f.4 SMBus: Intel Corporation Tiger Lake-H SMBus Controller (rev 11)
0000:00:1f.5 Serial bus controller [0c80]: Intel Corporation Tiger Lake-H SPI Controller (rev 11)
0000:01:00.0 VGA compatible controller: NVIDIA Corporation GA106M [GeForce RTX 3060 Mobile / Max-Q] (rev a1)
0000:01:00.1 Audio device: NVIDIA Corporation Device 228e (rev a1)
0000:2d:00.0 Network controller: MEDIATEK Corp. Device 7961
0000:2e:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15)
10000:e0:06.0 PCI bridge: Intel Corporation 11th Gen Core Processor PCIe Controller #0 (rev 05)
10000:e1:00.0 Non-Volatile memory controller: SK hynix Device 174a

I updated my kernel from 5.11 to 5.12.5 to fix wifi as mentioned here and the wifi started working (doesn't work after reboot but only shut down) but touchpad does not. Updated the kernel to versions 5.13.1, 5.13.2 and 5.13.4, 5.13.6, 5.14-rc2, 5.14-rc3 but doesn't work yet.

To make Kubuntu use synaptic instead of libinput (as i read elsewhere), I installed xserver-xorg-input-synaptics and removed libinput but after rebooting, keyboard and mouse stopped working so I had to install libinput again. Keeping both installed but increasing the priority of synaptic (as i read here) doesn't help either.

Also tried modifying grub by adding i8042.reset to GRUB_CMDLINE_LINUX_DEFAULT= as mentioned here but doesn't work.

I think my touchpad make is ELAN as I see some other Asus touchpad issues (on and off askubuntu) with Linux mentioning ELAN and the directory /sys/bus/i2c/devices/ shows a file i2c-ELAN1203:00. More info

$ cat /sys/bus/i2c/devices/i2c-ELAN1203\:00/name
ELAN1203:00

$ cat /sys/bus/i2c/devices/i2c-ELAN1203\:00/modalias
acpi:ELAN1203:PNP0C50: 

Looking into the output of dmesg, I see following logs

[ 0.861200] genirq: Setting trigger mode 8 for irq 167 failed (intel_gpio_irq_type+0x0/0x130)
[ 0.862657] tigerlake-pinctrl INT34C6:00: pin 226 cannot be used as IRQ
[ 0.862658] genirq: Setting trigger mode 8 for irq 167 failed (intel_gpio_irq_type+0x0/0x130)
[ 0.862688] i2c_hid_acpi i2c-ELAN1203:00: Could not register for ELAN1203:00 interrupt, irq = 167, ret = -1
[ 0.862712] i2c_hid_acpi: probe of i2c-ELAN1203:00 failed with error -1
[ 0.876848] i915 0000:00:02.0: [drm] VT-d active for gfx access

Issue reported on other forums

• Launchpad
• Kernel

I have other issues as well like Bluetooth not working and sleep mode consuming significant power to drain the battery in 6-8 hours but will do another issue for them.

Solution 1:

This issue is resolved by using a kernel patched here. Used it to patch kernel version 5.14-rc4 and touchpad worked.

The patch has landed in kernel version 5.14-rc6. Installed rc6 using Mainline and touchpad works.