This is more a 'bug' than a conformation: ACER T230H.
This touchscreen worked fine in 7.3.0. After updating the firmware of the Solution XL to 7.8.0 the touchscreen-controller has an initialisation problem.
After bootup of the desk the touchscreen of the Acer doesn't work.
In the 'Setup'-screen, I select 'Displays' and then 'Calibrate'. It takes a random time (from a few seconds to several minutes) of continually touching the screen before the first calibration-point is recognised (turns from blue into orange). The other two calibration points respond instantly.
After following this procedure the touchscreen works flawless. After I powercycle the desk or the monitor (or disconnect/reconnect the USB-cable) the problem occurs again and I have to recalibrate again to 'activate' the touchscreen.
In the list of USB-devices the Acer monitor is listed under "Input Devices" as:
/dev/input/event3, Acer T230H, usb-0000:00:0f.4-2/input0,