Laggy touchpad on new Gentoo install

Message

Azel04 · Post by **Azel04** » Tue Feb 20, 2024 12:52 pm

Like the title says, my touchpad is very laggy making it unusable.

I have an MS! Katana GF66 Laptop

Here is my kernel config: https://pastebin.com/tY7StCyS

The kernel log mentions something about the touchpad supporting another bus, here are the specific lines: https://pastebin.com/wPv9k6R7

On other distros (like Fedora) the touchpad is recognized as an MSNB0001:00 06CB:7E7E Touchpad (and it works fine), while on Gentoo it is recognized as a SynPS/2 Synaptics TouchPad

Post by **pietinger** » Tue Feb 20, 2024 1:52 pm

Azel04,

Welcome to Gentoo forums !

I can see you have configured your kernel yourself and tried to enable everything needed for an touchpad connected via i2c. Yes, you need PINCTRL for i2c ... but I dont think you need ALDERLAKE (12.Gen). Googling for this notebook told me it is an iX-11xxx Intel CPU, so maybe you need TIGERLAKE (11.Gen.). In every case you should enable IRQ_REMAP.

Code: Select all

CONFIG_PINCTRL_ALDERLAKE=y
# CONFIG_PINCTRL_TIGERLAKE is not set

# CONFIG_IRQ_REMAP is not set

(See more in the last chapter of: https://wiki.gentoo.org/wiki/User:Pieti ... ersion_6.6 )

grknight · Post by **grknight** » Tue Feb 20, 2024 2:01 pm

I suspect because Fedora uses modules everywhere, it works because hid-rmi is able to claim it above the PS/2 choices which are also modules.
In your kernel, hid-rmi is a module but the PS/2 are built-in and the latter takes precedence. If all where built-in or all modules for HID, then you may see a different result.

Azel04 · Post by **Azel04** » Tue Feb 20, 2024 4:45 pm

Googling for this notebook told me it is an iX-11xxx Intel CPU.

Nope, i have an i7 12700h, it's alder lake.

Azel04 · Post by **Azel04** » Tue Feb 20, 2024 5:19 pm

Nevermind! Enabling Tiger Lake support on the Pin Controller settings fixed the issue and the trackpad now works perfectly fine!

It's weird that i have to enable Tiger Lake support if I have an Alder Lake CPU tho.

logrusx · Post by **logrusx** » Tue Feb 20, 2024 6:42 pm

Azel04 wrote:Nevermind! Enabling Tiger Lake support on the Pin Controller settings fixed the issue and the trackpad now works perfectly fine!

It's weird that i have to enable Tiger Lake support if I have an Alder Lake CPU tho.

Sometimes older drivers work on newer hardware because either it's some kind of hybrid between old and new hardware or it's the same hardware disguised as new. Plus this is related to the busses rather than the CPU itself.

Code: Select all

head -n 5 /proc/cpuinfo

Best Regards,
Georgi

Post by **pietinger** » Tue Feb 20, 2024 6:55 pm

Azel04 wrote:It's weird that i have to enable Tiger Lake support if I have an Alder Lake CPU tho.

We have often had this problem in the past, where the CPU was 12th generation but TigerLake still had to be used.

(Dell XPS 9520 => cant find anymore, System76 Darter Pro 8 => viewtopic-t-1157071-highlight-.html )

... Now I will add your Notebook to the list

(viewtopic-p-8692426.html#8692426)

Post by **pietinger** » Tue Feb 20, 2024 7:08 pm

logrusx wrote:[...] Plus this is related to the busses rather than the CPU itself.

Yes, it depends on the PCH: https://en.wikipedia.org/wiki/Platform_Controller_Hub

Post by **pietinger** » Tue Feb 20, 2024 7:25 pm

Azel04,

do you have a HX CPU ?

https://en.wikipedia.org/wiki/List_of_I ... chipsets_3

=>

Every 12th Gen and 13th Gen Intel Core-i mobile CPU excluding HX-series has an on-package Platform Controller Hub.

Azel04 · Post by **Azel04** » Tue Feb 20, 2024 8:30 pm

pietinger wrote:Azel04,

do you have a HX CPU ?

https://en.wikipedia.org/wiki/List_of_I ... chipsets_3

=>
Every 12th Gen and 13th Gen Intel Core-i mobile CPU excluding HX-series has an on-package Platform Controller Hub.

Nope, i have an i7 12700h

Post by **pietinger** » Wed Feb 21, 2024 4:58 pm

Azel04 wrote:Nope, i have an i7 12700h

Jesus ... I am so blind ... you had mentioned it already.

Sorry for the noise and thanks again !