Comment 21 for bug 863154

@Alexia : Thanks a lot for the infos, thanks also for pointing the commit, but I think I'll not try to maintain Gimp-painter 2.6 or support it anymore. At least thats the idea for the moment ( can change in few hours XD ) , I decided to adapt myself to the Gimp dev version , or last realease ( as 2.7.3 , for exemple) .
No textured brushes and no smudgy mixbrush will be the main 2 features I'll drop off in the change ( I also liked 'reduce update frequency' , witch made in Gimp-painter the display faster and improved performance of painting ).
Anyway, compare to many improvement I noticed with time and testing the last dev version , it will be easier to have good mood to update. : )

@all : I tested upgrading to Xorg edgers package and adopt Nouveau driver for a Ubuntu 11.10 main edition. Bug is not happening with this if you use Gimp 2.6. Tested with Gnome Shell desktop mainly . But I'll not keeping this last solution test ; performances are so slow and make it unusable for my taste... Xfce Ubuntu studio 11.10 distro was really faster for displaying the painting strokes.