Comment 2 for bug 1958625

Thanks for the bug report. It looks like the touchscreen thinks either a button is held down or a finger is touching the screen during the downward cursor movement.

Please try running 'sudo evtest' in a separate window to log all the touchscreen events, and see if you can find evidence of the kernel thinking that is the case. If so then this should be reassigned to the kernel (if not a hardware problem).