GNOME Bugzilla – Bug 696148
Tablet performance very laggy
Last modified: 2013-04-23 03:23:40 UTC
Gimp is very laggy when trying to use my graphics tablet. It happens when trying to use it with pressure sensitivity (screen mode). It has been tested in 2.8.4 but also happened in 2.8.2 version. I've also tested in 2.9 and it seems to behave better although it's still slow to react. This does not happen in version 2.6. My graphics tablet is a Trust Aeroo (a branded Waltop Venus) using driver version 5.01.
Hi, I would like to confirm this bug. I'm using Gimp 2.8.4 (Windows) with a Wacom Intuos 5, and I too experience a huge lag. The lag can at times be close to 1.0s ! But, I did make a key discovery. This lag only happens in the x64 version, while the 32bit version draws as fast as I can think. Also, I don't think CPU usage is to blame. It's only using about 1/2 the throughput of 1 core. sp4ik, are you also using the x64 version?
Tested on booth 32 and 64 bit versions and behaving the same way. I've also tested with 32bit version drivers on Windows XP SP3 (under VirtualBox) with the same result.
I saw this effect with libcairo-2.dll version 1.12.0 and above. I went back to version 1.10.2, and the laggieness disappeared. Try a libcairo-2.dll version 1.10.2.
(In reply to comment #3) > I saw this effect with libcairo-2.dll version 1.12.0 and above. > I went back to version 1.10.2, and the laggieness disappeared. > Try a libcairo-2.dll version 1.10.2. It works! I replaced libcairo-2.dll and libpng with the ones available at the gtk+ website and now it's working smooth and fast.
Great, thanks for checking!
I've also replaced libcairo-2.dll with version 1.10.2 and the lag is now fixed! Thanks for the tip Hartmut. I will file this bug to Cairo developers