It seems the patches to force Radeon cards into PCI-mode (or force it via radeon.agpmode=-1) are no definitive solution. My G4 and G5 Macs hold out longer running X but sooner or later a hard lock is unavoidable. Tested this on a recent software stack: 4.8.1-kernel, xorg- server-1.18.4, xf86-video-ati-7.7.1 and mesa-12.0.3.
See my comment at Bug 94877. -- 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
