Hi, my touchpad (ELAN0501) isn't working on many boots since mid of January. I have two journalctl excerpts where it didn't work once and worked once. Touchpad is not working: $ journalctl -b -2 | grep -i elan Feb 04 00:30:03 name kernel: elan_i2c i2c-ELAN0501:00: i2c-ELAN0501:00 supply vcc not found, using dummy regulator Feb 04 00:30:03 name kernel: elan_i2c i2c-ELAN0501:00: Linked as a consumer to regulator.0 Feb 04 00:30:03 name kernel: elan_i2c i2c-ELAN0501:00: Elan Touchpad: Module ID: 0x0038, Firmware: 0x0009, Sample: 0x000b, IAP: 0x000a Feb 04 00:30:03 name kernel: input: Elan Touchpad as /devices/pci0000:00/0000:00:15.0/i2c_designware.0/i2c-1/i2c-ELAN0501:00/input/input6 Touchpad is working: $ journalctl -b -3 | grep -i elan Feb 02 23:11:19 name kernel: i2c_hid i2c-ELAN0501:00: i2c-ELAN0501:00 supply vdd not found, using dummy regulator Feb 02 23:11:19 name kernel: i2c_hid i2c-ELAN0501:00: Linked as a consumer to regulator.0 Feb 02 23:11:19 name kernel: i2c_hid i2c-ELAN0501:00: i2c-ELAN0501:00 supply vddl not found, using dummy regulator Feb 02 23:11:24 name kernel: i2c_hid i2c-ELAN0501:00: failed to reset device. Feb 02 23:11:25 name kernel: input: ELAN0501:00 04F3:300B Mouse as /devices/pci0000:00/0000:00:15.0/i2c_designware.0/i2c-1/i2c-ELAN0501:00/0018:04F3:300B.0001/input/input17 Feb 02 23:11:25 name kernel: input: ELAN0501:00 04F3:300B Touchpad as /devices/pci0000:00/0000:00:15.0/i2c_designware.0/i2c-1/i2c-ELAN0501:00/0018:04F3:300B.0001/input/input18 Feb 02 23:11:25 name kernel: hid-generic 0018:04F3:300B.0001: input,hidraw0: I2C HID v1.00 Mouse [ELAN0501:00 04F3:300B] on i2c-ELAN0501:00 Feb 02 23:11:25 name kernel: input: ELAN0501:00 04F3:300B Touchpad as /devices/pci0000:00/0000:00:15.0/i2c_designware.0/i2c-1/i2c-ELAN0501:00/0018:04F3:300B.0001/input/input20 Feb 02 23:11:25 name kernel: hid-multitouch 0018:04F3:300B.0001: input,hidraw0: I2C HID v1.00 Mouse [ELAN0501:00 04F3:300B] on i2c-ELAN0501:00 $ cat /sys/bus/serio/devices/serio0/firmware_id PNP: PNP0303 $ uname -a Linux name 4.19.19-1-lts #1 SMP Thu Jan 31 17:56:49 CET 2019 x86_64 GNU/Linux Same behaviour on 4.20.6.arch1-1 Cheers phi
