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Old 01-12-2021, 07:36 PM   #1
kn4thx
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Debian Bullseye Touchpad Not Working SynPS/2 Synaptics Touchpad


Hello,

I am having an issue getting a touchpad working in Debian Linux. when I run

xinput list

it shows

N: Name="SynPS/2 Synaptics TouchPad"

The touchpad does not respond. It is enabled in Settings. It works fine in Windows 10 ( I dual boot ).

Any help learning how to troubleshoot this is appreciated.
 
Old 01-12-2021, 07:54 PM   #2
ferrari
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From an Xorg driver perspective, show which driver is in use for that input device..,
Code:
grep -i ‘using input’ /var/log/Xorg.0.log
It could be that there is no kernel support for it (if a new device perhaps)...
Code:
dmesg | grep -i ‘input’

Last edited by ferrari; 01-12-2021 at 07:55 PM.
 
Old 01-12-2021, 08:00 PM   #3
kn4thx
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Quote:
Originally Posted by ferrari View Post
From an Xorg driver perspective, show which driver is in use for that input device..,
Code:
grep -i ‘using input’ /var/log/Xorg.0.log
It could be that there is no kernel support for it (if a new device perhaps)...
Code:
dmesg | grep -i ‘input’
Using those exact commands returned nothing. Had to sudo the dmesg.

Thank you.

If this info helps I ran : sudo dmesg | grep -i Syn

https://pastebin.com/13VUZfdN

Still a newbie at Linux.

Last edited by kn4thx; 01-12-2021 at 08:08 PM. Reason: Additional Info
 
Old 01-12-2021, 08:18 PM   #4
ferrari
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Yes, sudo is sometimes required. Depends on the distro.
 
Old 01-12-2021, 08:19 PM   #5
ferrari
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You can examine the Xorg log for yourself to see which input driver is used for the touchpad.
 
Old 01-12-2021, 08:31 PM   #6
ferrari
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The dmesg output for the touchpad is as expected.

Which desktop environment are you using? Not disabled there perhaps?
 
Old 01-12-2021, 08:42 PM   #7
kn4thx
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Here is what I found in the Xorg file :

[ 4.055] (II) config/udev: Adding input device SynPS/2 Synaptics TouchPad (/dev/input/event11)
[ 4.055] (**) SynPS/2 Synaptics TouchPad: Applying InputClass "evdev touchpad catchall"
[ 4.055] (**) SynPS/2 Synaptics TouchPad: Applying InputClass "libinput touchpad catchall"
[ 4.055] (**) SynPS/2 Synaptics TouchPad: Applying InputClass "touchpad catchall"
[ 4.055] (**) SynPS/2 Synaptics TouchPad: Applying InputClass "Default clickpad buttons"


I am in Cinnamon currently but also tried Gnome. I was originally in Xfce and hopped over to test other DEs.
 
Old 01-12-2021, 08:49 PM   #8
Timothy Miller
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What model is your laptop? A lot of "older" laptops work much better with synaptics driver than libinput. By "older", basically means pre-Skylake.
 
Old 01-12-2021, 08:53 PM   #9
kn4thx
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It is a T14 AMD laptop. The touchpad was replaced with a 01LX660 from an X1 Extreme so everything is fairly modern.
 
Old 01-12-2021, 09:09 PM   #10
Timothy Miller
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Well, I can tell you the stock touchpad would have worked FANTASTIC, I used my T14 AMD w/ Debian 11 for a bit before moving to EndeavourOS and it worked absolutely perfectly. No idea about an X1 Extreme touchpad, but surprised it doesn't work with libinput.
 
  


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