Found it! Loaded installer in rescue mode, mounted and launched a shell in the installed system.
root@debian:/home/porridge# # touchpad does not work root@debian:/home/porridge# dmesg|tail [...] [ 72.090285] EXT4-fs (dm-1): mounted filesystem fe627a07-f171-4074-b516-adb72b21bab0 r/w with ordered data mode. Quota mode: none. root@debian:/home/porridge# modprobe pinctrl_meteorlake root@debian:/home/porridge# # touchpad now works! root@debian:/home/porridge# dmesg|tail [...] [ 72.090285] EXT4-fs (dm-1): mounted filesystem fe627a07-f171-4074-b516-adb72b21bab0 r/w with ordered data mode. Quota mode: none. [ 660.196233] input: SNSL002D:00 2C2F:002D Mouse as /devices/pci0000:00/0000:00:15.0/i2c_designware.0/i2c-0/i2c-SNSL002D:00/0018:2C2F:002D.0001/input/input3 [ 660.196408] input: SNSL002D:00 2C2F:002D Touchpad as /devices/pci0000:00/0000:00:15.0/i2c_designware.0/i2c-0/i2c-SNSL002D:00/0018:2C2F:002D.0001/input/input4 [ 660.196476] hid-generic 0018:2C2F:002D.0001: input,hidraw0: I2C HID v1.00 Mouse [SNSL002D:00 2C2F:002D] on i2c-SNSL002D:00 [ 660.316781] input: SNSL002D:00 2C2F:002D Mouse as /devices/pci0000:00/0000:00:15.0/i2c_designware.0/i2c-0/i2c-SNSL002D:00/0018:2C2F:002D.0001/input/input6 [ 660.317289] input: SNSL002D:00 2C2F:002D Touchpad as /devices/pci0000:00/0000:00:15.0/i2c_designware.0/i2c-0/i2c-SNSL002D:00/0018:2C2F:002D.0001/input/input7 [ 660.317674] hid-multitouch 0018:2C2F:002D.0001: input,hidraw0: I2C HID v1.00 Mouse [SNSL002D:00 2C2F:002D] on i2c-SNSL002D:00 root@debian:/home/porridge#
