klipperscreen: alignment of the touch detection is a bit misaligned.

[consp]

Since we cannot yet properly calibrated (due to how tslib is not interacting with xorg properly) we should investigate this further.

It's not unusable but I've notice a tiny bit of drift between installs, could also be my fatty fingers but the result is the same (left part of screen is less easy to touch).

known issues:

• ev driver ignores ts calibration, or at least does it's own thing
• There is a 200-300 deadzone on all sides and it's not equal everywhere
• tslib driver does not work, this would be the best option to use it directly but I have not gotten it to work properly (yet)

If someone wants to help, please do the following:

• SSH to the printer
• kill klipperscreen /etc/init.d/S80klipperscreen stop
• export DISPLAY=:0.0
• collect output of xinput list
• xinput test 6 (will give no output and keep running)
• Press top left corner (a stream of events will be printed) and collect the output
• Press bottom right corner (again a steam of events will be printed) and collect the output
• Post output in issue here
• You can restart klipperscreen by rebooting or /etc/init.d/S80klipperscreen start. This takes a while!

[consp]

If it's possible to compile uinput tslib would possibly work which would provide a filtered input for evdev to use. This might fix the slight offset problem.

[consp]

evdev + ts_uinput + uinput gives resonable results. If I can get that running I'm calling this ok.

If you ever unload uinput about 4-5 times the kernel will segv on the sunxi ts driver. This has nothing to do with tslib or uinput.

[consp]

Got it working, works a bit better (no paralax anymore), tomorrow I'm going to figure out how to properly get the right event since camera's mess with it.

[consp]

fixed in 2f113da