kobra's questions

I can't seem to figure out how to disable the "tap dragging"-feature in Ubuntu 18.04's libinput. By disabling "tap dragging" I mean that I want to disable the dragging-functionality when using tap without actually disabling "Tap-to-click". This way when I want to drag something, I'd have to actually click on the touchpad. While it could be a handy feature for some, I don't really need it and it keeps triggering by accident. If it's any help, I am on Macbook Pro, some late-2013 or early-2014 version.

I've tried to search around for an answer, and checked libinput's manual to figure out the correct configuration. What I found was this:

Option "TappingDrag" "bool"

Enables or disables drag during tapping behavior ("tap-and-drag"). When enabled, a tap followed by a finger held down causes a single button down only, all motions of that finger thus translate into dragging motion. Tap-and-drag requires option Tapping to be enabled.

I tried to set this option in /usr/share/X11/xorg.conf.d/40-libinput.conf:

Section "InputClass"
        Identifier "libinput touchpad catchall"
        MatchIsTouchpad "on"
        MatchDevicePath "/dev/input/event*"
        Driver "libinput"
        Option "TappingDrag" "false"
EndSection

Reboot and tap dragging is still there. I also tried to add the same TappingDrag-option to the Touchscreen- and Tablet-sections in the config file with no luck. What am I doing wrong?

I hope someone knows the answer, this is really bugging me. Thanks in advance!

Just thought of dropping a question since this problem seems to have been around for quite some time.

Just now I have installed the new Ubuntu 18.04 on my Macbook Pro, and I notice the kworker hogging up a lot of CPU:

3411 root      20   0       0      0      0 R  84,4  0,0   6:12.23 kworker/0:0

Here's some other info about my setup:

lsb_release -a:

No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 18.04 LTS
Release:        18.04
Codename:       bionic

uname -a:

Linux MacbookPro 4.15.0-20-generic #21-Ubuntu SMP Tue Apr 24 06:16:15 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

Now I searched Google for answers on this problem and found plenty, actually. The answer in this thread did the trick for me: Why does kworker cpu usage get so high?

All I had to do was disable gpe06 and the hogging kworker-process was gone. First I looked for the gpe causing the high CPU load:

grep . -r /sys/firmware/acpi/interrupts/

Then going through the list and finding the gpe that hogs up the resources and disabling it:

cp /sys/firmware/acpi/interrupts/gpe06 /root/gpe06.backup
echo "disable" > /sys/firmware/acpi/interrupts/gpe06

My problem is that when I boot the machine, the damned kworker is running again. I know I can just disable it each time manually, but was wondering if there's a better solution for this? I tried following the instructions on the Ask Ubuntu thread I linked above, but it seems to be an outdated guide on how to get this running on startup.

So, how do I make this a permanent solution so I don't have to disable the gpe06 each time I start the laptop?