I have a modular java project (http://pooter.sourceforge.net)

One of the modules implements a mindmap - a sort of electronic scribble diagram. It uses some custom painting code in a JPanel with a null layout manager. It worked fine in Slack11 (with both 2.4 and 2.6 kernels) and most other OS/JVM combinations I've tested it on.

On Slack12, whichever kernel I use (huge/smp/generic) it quickly grinds everything to a standstill; mouse and button events take minutes to take effect and any other running program is also affected. I tried reverting to the JVM I was using with 11.0, but no improvement.

Any ideas about this - is it some kernel configuration issue, or connected with X11?

Try running "top" from CLI when this is occurring to see what is eating up the processor. Might give some good clues.

I have a similar problem using jedit, the scrolling is mighty slow and the dialogs take forever to open. The avg load rises quickly to. I installed several older jvm but that was not the problem. I think. Other programs using java seem to work fine. There must be a particular slack12 configuration.

I downloaded and installed Pooter to see if I would experience the same problems (pretty neat software!). I ran it and messed around in the gui for while (looking at the calender app, writing a note, looking at the help and preferences dialogs.) I noticed no lag whatsoever; everything ran very smoothly. I'm running a pretty typical Slackware 12, except I updated the xf86-video-ati package using the newer one in /extra (xf86-video-ati-6.6.3-i486-3). This fixed a lot of graphical bugs for me. Are any of you running ati cards?


EDIT: Yeah I was wrong . I figured out how to add a node to the mindmap (if I would have read your post more closely, I would have known to try that in the first place!) and everything slowed to a crawl just as you described. top showed java eating all the cpu time. Sorry I was no help!

Yes the Calendar module is fine; its the Thought Map module that is affected. Please try this and let me know, maybe the new X solves this problem.

There are some example Thought Maps in /usr/lib/pooter/examples/ThoughtMap. If you copy these into <Pooter data dir>/ThoughtMap, you can load them. Try moving the nodes around or editing them.

Woops! Notice I edited my above post. I should have read your post more carefully, sorry!