[solved] touchpad not working

luna80 · Last edited by luna80 on Tue Apr 05, 2022 3:59 am; edited 1 time in total

As the title I cannot set up my touchpad on a Lenovo IdeaPad 3, I search for solutions but without success

here my lspci

fedeliallalinea · Posted: Wed Feb 09, 2022 8:17 am Post subject:

Lenovo IdeaPad 3 seems to use Elantech PS/2 touchpad so try to enable CONFIG_MOUSE_PS2_ELANTECH in your kernel configuration.
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luna80 · Posted: Wed Feb 09, 2022 8:52 am Post subject:

thanks, I add in the kernel (built-in) but still doesn't works
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luna80 · Posted: Thu Feb 10, 2022 6:28 am Post subject:

it should be an msft mylar touchpad, but I see that there are no drivers in the kernel

someone seems to have managed to make it work, but personally I can't find a solution

fedeliallalinea · Posted: Thu Feb 10, 2022 7:42 am Post subject:

Maybe this can help.
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luna80 · Posted: Thu Feb 10, 2022 8:34 am Post subject:

I read this but without success.

maybe I try to set all as module and not built-in in the kernel?! but I don't think something change
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luna80 · Posted: Sun Feb 13, 2022 4:49 am Post subject:

I tried to downgrade the kernel version to 5.10.100 and the touchpad works...so it's a problem of newer kernels..

there is something that I can do to understand how resolve?
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Hu · Administrator Joined: 06 Mar 2007 Posts: 23071

You have stated a good kernel version. What is the nearest bad kernel version? If they are in the same release series (both 5.10.x), you could bisect to find which stable patch broke it. If not, then bisection is harder. What is the newest bad kernel version you have tried? Sometimes these issues are fixed upstream as part of other development, and running a newer kernel will resolve the problem on its own.

luna80 · Posted: Mon Feb 14, 2022 4:32 am Post subject:

I tried gentoo-sources:5.15.23/5.15.19/5.15.16 before 5.10.100

Now I think that I'll try every newer version, hoping it will be solved, like you say
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Hu · Administrator Joined: 06 Mar 2007 Posts: 23071

That is unfortunate. If it works in all v5.10.x and failed in all v5.15.x, then it likely broke somewhere in [v5.11, v5.15]. Finding that will be hard, as it covers a year of development and tens of thousands of commits.

fedeliallalinea · Posted: Mon Feb 14, 2022 5:15 pm Post subject:

Some, perhaps useful, links
https://wiki.archlinux.org/title/Lenovo_IdeaPad_Flex_5_14ARE05#Issues
https://bugzilla.kernel.org/show_bug.cgi?id=209413
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pietinger · Posted: Tue Apr 05, 2022 12:50 am Post subject:

luna80 · Posted: Tue Apr 05, 2022 3:58 am Post subject:

I tried with the 5.15.26 version and now it works

very usefull was this link https://forums.gentoo.org/viewtopic-p-8692426.html#8692426 also
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pietinger · Posted: Tue Apr 05, 2022 11:24 am Post subject:

luna80 · Posted: Tue Apr 05, 2022 1:18 pm Post subject:

pietinger · Posted: Tue Apr 05, 2022 1:34 pm Post subject: