Re: [Linuxwacom-discuss] Wacom pen lagging when editing images

[Alexia D. <ale...@gm...>]

On Wednesday, July 28, 2010 16:46:46 Ashley Weaver wrote:
> We’re having trouble with the pen lagging, and image display lag on the
> wacom when using the editing features in an imaging program (Slicer 3D). 
> We are noticing this lag only when working on the wacom and when using a
> regular monitor there is no lag. 
Monitor is not really a factor. Does it lag when you use a mouse? Have you 
tried a regular pen tablet?

> There is also a decrease in the lagging
> if the editing is done on a smaller portion of the wacom screen and not in
> full screen mode so it appears to be related to the amount of information
> processed. Is anyone else having similar issues or know a way to correct
> this delay?   Wacom = 21UX, Machine = 64-bit linux running Red Hat.
> Thanks!
I am willing to bet this is a software issue. Ive encountered it in GIMP 
development. If your application uses event driven rendering, the events just 
overwhelm the CPU with screen refreshing, and yes, working in a smaller window 
would ease the load because it limits the area to be re-rendered, Tablets are 
so exact that theres many more events than would actually cause a perceptible 
change on screen and if an application still tries to refresh at each event, 
you get a huge lag. There are several issues in GIMP related to this very same 
problem and its still not completely solved but we are working on it...

-- Alexia