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Touchpad suddenly doesn't work

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shogun1234
Posts: 156
Joined: 2006-07-13 08:04
Has thanked: 3 times

Touchpad suddenly doesn't work

#1 Post by shogun1234 »

I installed Debian on my laptop

Code: Select all

$cat /etc/debian_version 
bookworm/sid

Code: Select all

$ sudo dmidecode | grep -A3 '^System Information'
System Information
	Manufacturer: HP
	Product Name: HP EliteBook 840 G8 Notebook PC
	Version:  
with kernel 5.16.0-1-rt-amd64. Everything works fine (around a year), then a few mins ago suddenly touch pad is no longer functioning. I can't move the mouse cursor, nor click anything with touch pad's left/ right button. Blue dot also doesn't work at all. So now I plug in an USB mouse as temp solution, but it's inconvenience.

Where should I check the log or any fix steps that I can apply for troubleshooting and fix my problems? Many thanks.

shogun1234
Posts: 156
Joined: 2006-07-13 08:04
Has thanked: 3 times

Re: Touchpad suddenly doesn't work

#2 Post by shogun1234 »

OK I tried adding i8042.nonpnp to /etc/default/grub[1] as below, doing update-grub but it doesn't work

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GRUB_CMDLINE_LINUX_DEFAULT="quiet i8042.nopnp"
[1]. viewtopic.php?t=117197

shogun1234
Posts: 156
Joined: 2006-07-13 08:04
Has thanked: 3 times

Re: Touchpad suddenly doesn't work

#3 Post by shogun1234 »

After doing the step above (add i8042.nonpnp to grub), then blacking list i2c_hid and rebooting do not work either.

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$ cat /etc/modprobe.d/i2c_hid.conf 
blacklist i2c_hid
$ sudo depmod -ae
$ sudo reboot
[1]. https://wiki.debian.org/KernelModuleBlacklisting

shogun1234
Posts: 156
Joined: 2006-07-13 08:04
Has thanked: 3 times

Re: Touchpad suddenly doesn't work

#4 Post by shogun1234 »

After the previous two steps, adding synaptics_i2c to /etc/modules (and then rebooting) also doesn't work.

Code: Select all

$ cat /etc/modules
synaptics_i2c

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