@john This problem was meanwhile worked around by setting radeon.agp.mode=-1 as default in recent kernels (=> 5.0 ?). So you don't need to fiddle around with your settings here. Unfortunately Ubuntu ppc support is dead, only ppc64le option is maintained.
But there are other distros (Void, Adelie). Void has very good ppc support, a working Firefox 72 for ppc64 and working epiphany browser for ppc. Also live images are avaiable: https://voidlinux-ppc.org/ -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1571416 Title: System freezes shortly after reaching the desktop (Ubuntu MATE 16.04, PowerPC) Status in Linux: Unknown Status in linux package in Ubuntu: Confirmed Bug description: The freeze happens every time unless I use "radeon.agpmode=-1" as a kernel parameter. Affected machines: PowerBook G4 5,6 + PowerMac G5 7,3 (w. "ATI Radeon 9600 AP (AGP)". ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-18-powerpc-smp 4.4.0-18.34 ProcVersionSignature: Ubuntu 4.4.0-18.34-powerpc-smp 4.4.6 Uname: Linux 4.4.0-18-powerpc-smp ppc ApportVersion: 2.20.1-0ubuntu2 Architecture: powerpc AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CasperVersion: 1.373 CurrentDesktop: MATE Date: Sun Apr 17 21:08:40 2016 IwConfig: lo no wireless extensions. enP2p36s15f0 no wireless extensions. LiveMediaBuild: Ubuntu-MATE 16.04 LTS "Xenial Xerus" - Release powerpc (20160417.1) PccardctlIdent: Socket 0: no product info available PccardctlStatus: Socket 0: no card ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 radeondrmfb ProcKernelCmdLine: ro ramdisk_size=1048576 file=/cdrom/preseed/username.seed boot=casper quiet --- radeon.agpmode=-1 RelatedPackageVersions: linux-restricted-modules-4.4.0-18-powerpc-smp N/A linux-backports-modules-4.4.0-18-powerpc-smp N/A linux-firmware 1.157 RfKill: 0: hci0: Bluetooth Soft blocked: no Hard blocked: no SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1571416/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp