you'll have to add the parameter in the append section for the two entries, ie:
append="radeon.agpmode=-1" or if you want the splash thingy append="radeon.agpmode=-1 splash quiet" -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1571416 Title: System freezes shortly after reaching the desktop (Ubuntu MATE 16.04, PowerPC) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1571416/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs