FS#67262 - [linux] ELAN1205 touchpad is not recognized.

Attached to Project: Arch Linux
Opened by Alexei (eth01) - Monday, 13 July 2020, 10:03 GMT
Last edited by freswa (frederik) - Sunday, 13 September 2020, 14:54 GMT
Task Type Bug Report
Category Kernel
Status Closed
Assigned To Tobias Powalowski (tpowa)
Jan Alexander Steffens (heftig)
Levente Polyak (anthraxx)
Architecture x86_64
Severity High
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 2
Private No

Details

Description:
Hello, I have a new Laptop since kernel 5.7.2-arch1-1. Now It is 5.7.7-arch1-1 and the touchpad is still not working.
Laptop manufacturer: Asus
Model: ROG-Zephyrus-G15 GA502IV

It looks like kernel recognizes the touchpad but doesn't enable it.

# dmesg | grep -i elan
[ 4.830134] i2c_hid i2c-ELAN1205:00: supply vdd not found, using dummy regulator
[ 4.830150] i2c_hid i2c-ELAN1205:00: supply vddl not found, using dummy regulator

And the device doesn't appear in the input devices list.
Looks like kernel bug.
Touchpad works fine in Windows (have a dual-boot).
Fast boot is disabled in BIOS.


   lsmod.log (8.1 KiB)
   dmidecode.log (10.2 KiB)
   dmesg.log (98 KiB)
   devices.log (6.5 KiB)
This task depends upon

Closed by  freswa (frederik)
Sunday, 13 September 2020, 14:54 GMT
Reason for closing:  Upstream
Additional comments about closing:  This is not a packaging bug. Please report this upstream. A potential workaround is included in the last comment. Thank you
Comment by Alexei (eth01) - Monday, 13 July 2020, 14:54 GMT
  • Field changed: Percent Complete (100% → 0%)
I did ask for help on the forum. https://bbs.archlinux.org/viewtopic.php?id=256652 After almost a month I do realize that this is a bug. Because I did try almost everything. According to this https://wiki.ubuntu.com/DebuggingTouchpadDetection - if there is no input device for touchpad - this is a kernel bug.
Comment by DeepB (DeepB.bak) - Sunday, 06 September 2020, 16:03 GMT
Same problem in my same laptop.
Touchpad is missing in the 'xinput --list' log.

In the mainline kernel, liquorix, or my own 5.8.x kernel .
Comment by John Ruskin (shitespeare) - Sunday, 13 September 2020, 11:55 GMT
This specific bug came up again on 5.8.8 zen kernel.
Can be fixed by adding i8042.nomux=1 i8042.reset to kernel parameters.

Edit: The device is i2c-ELAN0501.

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