iptsd freezes the OS (?) and unable to stop service

[horvathcsabalaszlo]

Hi,

I continued to use my Pro 4, which had ghost touch issues. After calibrating, and fine-tuning the values in config, t's almost OK. (Heat is the main problem, external, and the display backlight). (Palm detection works fine, if i tap the screen on a larger area, it resets the touch and ghost touches disappear for a while.)

The two new issues :

• Cannot stop iptsd@hidraw2 . I have hidraw0, 1, and 2, the find script returns the 2 as the main one. Simple systemctl stop iptsd@hidraw0 kills the 0, 1 the 1, but systemctl stop iptsd@hidraw2 does nothing. If i kill the process, it stops, and the touch works further, and ghost touches go away. Guess that it falls back to one-touch mode. (In addition; after killing the Iptsd, this is in the dmesg :

[   55.622392] ipts 0000:00:16.4-3e8d0870-271a-4208-8eb5-9acb9402ae04: Stopping IPTS
[   56.734711] ipts 0000:00:16.4-3e8d0870-271a-4208-8eb5-9acb9402ae04: Starting IPTS
[   56.747401] ipts 0000:00:16.4-3e8d0870-271a-4208-8eb5-9acb9402ae04: IPTS EDS Version: 1
[   56.750303] ipts 0000:00:16.4-3e8d0870-271a-4208-8eb5-9acb9402ae04: IPTS running in event mode

...is there a way to start Iptsd in event mode...?)

• Sometimes the whole UI stops working when there are extraordinarily high number of ghost touches. Window manager restart helps, but i lose touch. This can have other root causes, but it seems to be in relation with high number of ghost touches. (It does not happen when i kill the Iptsd.)

• Sometimes after waking the device from suspend, the iptsd does not start. Then the dmesg output contains :

[ 2800.135013] ipts 0000:00:16.4-3e8d0870-271a-4208-8eb5-9acb9402ae04: Failed to reset sensor: -11
[ 2800.135022] ipts 0000:00:16.4-3e8d0870-271a-4208-8eb5-9acb9402ae04: Failed to switch modes: -11

After this, starting the service, even if it keeps being running, it does nothing.

Debian testing/testing, Pro 4... Iptsd from repo.

Thanks for any help :)

Update : figured out how to stop iptsd correctly, so after stopping, it goes to event mode. Wrote a script to stop the service after startup and wakeup, but it's not the perfect solution. Sometimes after waking up the touch does not work; so need to put the device in sleep again, and wake up again... :D

[noughtmare]

I think I sometimes encounter a similar issue on my Surface Pro 6. Can you say what the proper way is to stop iptsd if it hangs?