As of today this issue seem resolved, I updated to the above mentioned drivers (from xserver-xorg-video-radeon (1:6.12.191-1ubuntu2) to 1:6.12.192-2ubuntu1) and I can now have transparency option checked and terminal starts just as fast as it should.
Also firefox large image issue is gone. -- transparent background heavily delays gnome-terminal start up https://bugs.launchpad.net/bugs/530094 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs