After some more testing it turned out that adding "video=radeonfb:off" to the kernel command line fixes the problem and makes modesetting work on the Mac Mini G4.
The driver is actually blacklisted by default: root@test-adrian1:~# grep radeonfb /etc/modprobe.d/* /etc/modprobe.d/fbdev-blacklist.conf:blacklist radeonfb root@test-adrian1:~# However, it's still loaded before the actual root filesystem is mounted and is later unloaded. Even after then, modesetting doesn't work after loading the "radeon" module. So, radeonfb has to be prevented from loading from earlier on, probably by disabling it in the kernel configuration or blacklisting it in the initrd. Adrian -- .''`. John Paul Adrian Glaubitz : :' : Debian Developer - [email protected] `. `' Freie Universitaet Berlin - [email protected] `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913 -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: https://lists.debian.org/[email protected]

