Originally Posted by wjaguar (Post 157826)

This may be a more general X problem - because I get something very like this on a desktop PC running a Slackware 11.0 derivative.

After noticing one time that random strokes in mtPaint get interrupted for no apparent reason, I investigated the problem - and this is what I found out:
When some programs (Kate for one) are running in the background, and mouse is moved vigorously enough with a button pressed, X may generate spurious button-release events, and follow them by equally spurious button-press events some random time later. Any X client gets affected, and no app-level workaround seems possible - I used xev to dump X event stream, and the spurious events appearing in there are absolutely indistinguishable from normal ones.
And in mtPaint, a button release event terminates current stroke, and a button press event starts a new stroke.

-= With best regards, Dmitry Groshev, maintainer of mtPaint =-

Originally Posted by wjaguar (Post 157826)

This may be a more general X problem - because I get something very like this on a desktop PC running a Slackware 11.0 derivative.

After noticing one time that random strokes in mtPaint get interrupted for no apparent reason, I investigated the problem - and this is what I found out:
When some programs (Kate for one) are running in the background, and mouse is moved vigorously enough with a button pressed, X may generate spurious button-release events, and follow them by equally spurious button-press events some random time later. Any X client gets affected, and no app-level workaround seems possible - I used xev to dump X event stream, and the spurious events appearing in there are absolutely indistinguishable from normal ones.
And in mtPaint, a button release event terminates current stroke, and a button press event starts a new stroke.

-= With best regards, Dmitry Groshev, maintainer of mtPaint =-

Originally Posted by Karel Jansens (Post 157899)

So it's impossible to have a decent drawing application on a Linux/X tablet?

Nice...

Originally Posted by wjaguar (Post 157826)

This may be a more general X problem - because I get something very like this on a desktop PC running a Slackware 11.0 derivative.

After noticing one time that random strokes in mtPaint get interrupted for no apparent reason, I investigated the problem - and this is what I found out:
When some programs (Kate for one) are running in the background, and mouse is moved vigorously enough with a button pressed, X may generate spurious button-release events, and follow them by equally spurious button-press events some random time later. Any X client gets affected, and no app-level workaround seems possible - I used xev to dump X event stream, and the spurious events appearing in there are absolutely indistinguishable from normal ones.
And in mtPaint, a button release event terminates current stroke, and a button press event starts a new stroke.

-= With best regards, Dmitry Groshev, maintainer of mtPaint =-

Originally Posted by Karel Jansens (Post 157899)

So it's impossible to have a decent drawing application on a Linux/X tablet?

Originally Posted by awe215 (Post 157928)

Here is a quick sketch made with mtpaint. I have been trying to sketch from life with this tablet. Self portraits done a with mirror seem impossible! Here is a quick self portrait... of my finger!

Originally Posted by Bundyo (Post 157944)

You judge too fast. Read first :)

Originally Posted by Bundyo (Post 157982)

Anyway, on the topic - i ran a xev on it and it seems that after time any events just stop until the stylus is released. No presses/releases. Weird.