Touchpad and keyboard randomly freezing (Elantech)

xghozt

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I have an issue that causes my touchpad and keyboard to freeze completely, randomly. I have searched and tried dozens of possible solutions to no avail. This problem spans across multiple distros. I've tried everything from various Ubuntu flavors to arch, etc.. I have ruled out hardware failure and replaced my RAM just in case. I've tried synaptics and libinput, several different kernels.

I've narrowed it down to being related to having an "elantech" touchpad.

When it freezes, the only thing I can do is plugin a usb keyboard and run this:
Code:
sudo modprobe -r psmouse && sudo modprobe psmouse

After that, it works fine for a while. Sometimes for 2 minutes, sometimes 5 hours... it's seemingly random.

I've never had it freeze when the machine is idle. I have had it freeze with the lmb "pressed", usually it's when I'm "using" the mouse in some way. Dragging, multi-touch or clicking.

There are THOUSANDS of posts online with different ideas and possible solutions.. not a single one has a fully "working" solution for intel laptops with an elantech touchpad.

Can anyone here help?

Here's some more information that may help debug.

Code:
[34970.992535] psmouse serio1: elantech: assuming hardware version 4 (with firmware version 0x361f03)
[34971.008217] psmouse serio1: elantech: Synaptics capabilities query result 0x41, 0x15, 0x0f.
[34971.023257] psmouse serio1: elantech: Elan sample query result 06, 29, 75
[35622.417867] psmouse serio1: bad data from KBC - timeout bad parity
[35622.427542] psmouse serio1: Touchpad at isa0060/serio1/input0 lost sync at byte 6
[35622.440276] psmouse serio1: Touchpad at isa0060/serio1/input0 lost sync at byte 6
[35622.453046] psmouse serio1: Touchpad at isa0060/serio1/input0 lost sync at byte 6
[35622.465783] psmouse serio1: Touchpad at isa0060/serio1/input0 lost sync at byte 6
[35622.478506] psmouse serio1: Touchpad at isa0060/serio1/input0 lost sync at byte 6
[35622.478516] psmouse serio1: issuing reconnect request
[39095.137332] psmouse serio1: elantech: assuming hardware version 4 (with firmware version 0x361f03)
[39095.153095] psmouse serio1: elantech: Synaptics capabilities query result 0x41, 0x15, 0x0f.
[39095.168069] psmouse serio1: elantech: Elan sample query result 06, 29, 75

Code:
# xinput
⎡ Virtual core pointer                        id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                  id=4    [slave  pointer  (2)]
⎜   ↳ ETPS/2 Elantech Touchpad                    id=19    [slave  pointer  (2)]

I'm on archlinux at the moment as I was hoping to keep things simple but I haven't had any luck. I had the same problem on every distro I have tried. Including Ubutunu, Linuxmint, Pop_OS and a few more. Here's the current kernel:

Code:
Linux version 5.18.15-arch1-2 ([email protected]) (gcc (GCC) 12.1.1 20220730, GNU ld (GNU Binutils) 2.38)

Other things I have tried:
Adding "psmouse.proto=bare" to "/etc/default/grub"
Creating a /etc/X11/xorg.conf.d/70-synaptics.conf file with various options.
Modifying /etc/mkinitcpio.conf MODULES to load i915 first.
Adding /etc/modprobe.d/elan.conf with "options psmouse elantech_smbus=0 synaptics_intertouch=0"

The laptop I have is a samsung NP900X4C-A03US. Although in my googling this problem appears to not only be samsung laptops.

^ None of this made any difference towards solving the problem.

At this point if it's not something I can resolve then I'd even settle for automatically running the modprobe command when it fails, but I'm not sure how to detect that it failed since there is usually no error in any log files that I can find.
 
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