reload-dell-touchpad_modules.sh

#!/bin/bash
# Workaround for https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1784152
# Copy the script to /lib/systemd/system-sleep/reload-dell-touchpad.sh

SUSPEND_MODULES="i2c_hid"

case $1 in
    pre)
        for mod in $SUSPEND_MODULES; do
            rmmod $mod
        done
    ;;
    post)
        for mod in $SUSPEND_MODULES; do
            modprobe $mod
        done
    ;;
    reload)
        for mod in $SUSPEND_MODULES; do
	    rmmod $mod
	    modprobe $mod
	done
    ;;
esac

Thanks!

Thanks a lot. This is probably applicable for non-Dell laptops too, at least those with so-called "precision touchpad".
On that note, rename your file to "reload-touchpad" 😆

Good deal, I've done something very similar, but was just reloading it on post, might be all the same but i like your approach better.

The ability to reprobe i2c-hid is broken in 4.20, but a fix was accepted into 5.1.

You can also apply this patch to fix issue all together if you're building your own kernel:
https://lore.kernel.org/lkml/[email protected]/raw

@jbroadus Thank you very much for your patches. Is
https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git/commit/?h=i2c/for-next&id=93b6604c5a669d84e45fe5129294875bf82eb1ff
the fix accepted into 5.1?