Confirmed Diggao's post #11. Line streaking/spiking was produced in GIMP 2.6 using only a standard generic Microsoft Optical Mouse (USB-PS/2 Compatible) and Ubuntu 11.10. Nothing like this seen in other programs such as MyPaint, SynfigStudio, Inkscape or Blender.
In fact, the streaking frequency was far more prevalent, 5 to 10 times greater, with the mouse than the Genius Mousepad 8x6 Tablet on our 64bit Ubuntu setup. Did the same thing with a Dell ball-tracking mouse with PS/2 connection on our 32bit Ubuntu setup. I can't help but think that maybe someone made some little tweak in communication protocol and loused up the connection handshaking from what was previously agreed upon. Or maybe another few clock cycles were added in some other process that causes a loss of communication which must be then reestablished. Maybe the line streaks in GIMP 2.6 are the same thing as the dropouts you get the faster you draw in GIMP 2.7.3. Perhaps they are the same problem manifest differently. The problem is across multiple hardware peripheral devices proven to work before the upgrade to 11.10. So it's not the hardware or their drivers. It has to be the way information is passed to and from GIMP to the Kernel. The compatibility problem is probably in the new kernel. It would be interesting to find another debian based distro with the same kernel to see if the problem can be reproduced. Or maybe it is that compounded with a buggy Compiz. Deevad may be correct about a buggy Compiz and Xorg. "Compiz is one of the first compositing window managers for the X Window System that uses 3D graphics hardware to create fast compositing desktop effects for window management. The effects, such as a minimization effect and a cube workspace are implemented as loadable plugins. Because it conforms to the Inter-Client Communication Conventions Manual standard, Compiz can substitute for the default Mutter in GNOME or KWin in KDE." >From http://www.davidrevoy.com/index.php?article95/linux-mint-11 -install-notes "Correct distribution bugs : Linux Mint 11 comes with all the bugs of Ubuntu 11.04 Natty Narval . Bugs makes Compiz laggy ( effect for windows manager ), problems for 3D programs and tablet. " -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gimp in Ubuntu. https://bugs.launchpad.net/bugs/863154 Title: Wacom Bamboo One tablet random coordinate malfunctions Status in “gimp” package in Ubuntu: Confirmed Bug description: The tablet in overall seems to work correctly, with all pressure- features working. But quite frequently, while drawing, GIMP seems to wrongly read the coordinates of the stylus (as zeros, or negative values?), resulting in frequent, random 'line-peaks' in the direction of the left and upper image edges. With this bug it is hard to even use the tablet, since these problems are very frequent (see the exemplary image attached). The tablet works with no problems in MyPaint. The bug is reproducible in both Unity-2d and Unity-3d. I also notice the CPU usage increasing dramatically during drawing with any brush. Steps to reproduce: 1. Connect the Wacom Bamboo One tablet 2. Open GIMP 3. Start drawing longer strokes with any brush Expected result: The brush stroke as intended by moving the stylus Actual result: The brush stroke as intended with frequent, random line-strokes towards image edges System: Ubuntu 11.10 oneiric (development branch) GIMP version: 2.6.11 (package version: 2.6.11-2ubuntu3) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gimp/+bug/863154/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
