@Ayberk: Thank you for these details but it seems this ppa (https://launchpad.net/~ubuntu-x-swat/+archive/intel-graphics-updates) contains old packages and you're using llvmpipe:
OpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 0x301) -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to mesa in Ubuntu. https://bugs.launchpad.net/bugs/1180646 Title: cairo-dock rendering issues using openGL backend on intel GPU To manage notifications about this bug go to: https://bugs.launchpad.net/mesa/+bug/1180646/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp