Re: Help getting ELAN066C touchpad working in Linux

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On Sat, 2023-10-14 at 21:39 +0200, Hans de Goede wrote:
> Hi Jonathan,
> 
> For starters, did you see this in dmesg? :
> 
> [    0.422648] i8042: PNP: PS/2 Controller [PNP0303:KBC0] at
> 0x60,0x64 irq 1
> [    0.422652] i8042: PNP: PS/2 appears to have AUX port disabled, if
> this is incorrect please boot with i8042.nopnp
> 
> And did you try booting with "i8042.nopnp" ?
> 
> Also what is the output of:
> 
> ls -l /sys/bus/i2c/devices
> 
> and of:
> 
> ls -l /sys/bus/acpi/devices/ELAN066C:00/
> 
> and of:
> 
> cat /sys/bus/acpi/devices/ELAN066C:00/status
> 
> ?

Hey Hans,

Yeah, I did see that in my dmesg and did try i8042.nopnp by itself and
with combinations of pci=nocrs and the other i8042 options, with no
effect except breaking audio.

# ls -l /sys/bus/i2c/devices
total 0
lrwxrwxrwx. 1 root root 0 Oct 14  2023 i2c-0 -> ../../../devices/platform/AMDI0010:00/i2c-0
lrwxrwxrwx. 1 root root 0 Oct 14  2023 i2c-1 -> ../../../devices/platform/AMDI0010:01/i2c-1
lrwxrwxrwx. 1 root root 0 Oct 14 21:11 i2c-2 -> ../../../devices/pci0000:00/0000:00:08.1/0000:04:00.0/i2c-2
lrwxrwxrwx. 1 root root 0 Oct 14 21:11 i2c-3 -> ../../../devices/pci0000:00/0000:00:08.1/0000:04:00.0/i2c-3
lrwxrwxrwx. 1 root root 0 Oct 14 21:11 i2c-4 -> ../../../devices/pci0000:00/0000:00:08.1/0000:04:00.0/i2c-4
lrwxrwxrwx. 1 root root 0 Oct 14 21:11 i2c-5 -> ../../../devices/pci0000:00/0000:00:08.1/0000:04:00.0/drm/card1/card1-eDP-1/i2c-5
lrwxrwxrwx. 1 root root 0 Oct 14 21:11 i2c-6 -> ../../../devices/pci0000:00/0000:00:08.1/0000:04:00.0/drm/card1/card1-DP-1/i2c-6
lrwxrwxrwx. 1 root root 0 Oct 14 21:15 i2c-7 -> ../../../devices/pci0000:00/0000:00:14.0/i2c-7
lrwxrwxrwx. 1 root root 0 Oct 14 21:15 i2c-8 -> ../../../devices/pci0000:00/0000:00:14.0/i2c-8
lrwxrwxrwx. 1 root root 0 Oct 14 21:15 i2c-9 -> ../../../devices/pci0000:00/0000:00:14.0/i2c-9
lrwxrwxrwx. 1 root root 0 Oct 14  2023 i2c-ELAN238E:00 -> ../../../devices/platform/AMDI0010:00/i2c-0/i2c-ELAN238E:00

# ls -l /sys/bus/acpi/devices/ELAN066C:00/
total 0
-r--r--r--. 1 root root 4096 Oct 14 21:16 hid
-r--r--r--. 1 root root 4096 Oct 14 21:16 modalias
-r--r--r--. 1 root root 4096 Oct 14 21:16 path
lrwxrwxrwx. 1 root root    0 Oct 14 21:16 physical_node -> ../../../../platform/AMDI0010:01/ELAN066C:00
drwxr-xr-x. 2 root root    0 Oct 14 21:16 power
-r--r--r--. 1 root root 4096 Oct 14 21:16 status
lrwxrwxrwx. 1 root root    0 Oct 14  2023 subsystem -> ../../../../../bus/acpi
-rw-r--r--. 1 root root 4096 Oct 14  2023 uevent

# cat /sys/bus/acpi/devices/ELAN066C:00/status
15

The above is exactly the same on a clean Fedora 6.5.6 kernel and my
custom build with the alias added to elan_i2c.

Thanks for the swift reply!

Jonathan




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