https://bugzilla.kernel.org/show_bug.cgi?id=30812
Summary: radeon module fails to initialize with modeset=1 on PPC32 with RV280 Product: Drivers Version: 2.5 Kernel Version: 2.6.35 to 2.6.38-rc6 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) AssignedTo: drivers_video-dri@kernel-bugs.osdl.org ReportedBy: bugzilla_kernel_org@nguyen.vg Regression: No
Created an attachment (id=50462) --> (https://bugzilla.kernel.org/attachment.cgi?id=50462) output of dmesg after boot (radeon as module, modeset=0) and rmmod of radeon
Hardware: MacMini G4 (ppc-32). Graphic adaptor: Radeon 9200 (RV280) probably a 'mac' version. Symptoms:
with modprobe radeon modeset=0, everything works fine. Machine boots normally, X works, xrandr and Xv too.
with modeset=1, modeprobe never returns and gets stucked durring initialization. More specifically, the call to radeon_fence_wait in r100_ib_test (r100.c) loops endlessly (or at least for several hours). I'm attaching dmesg of a modified driver with more printk.
I have tried several combination of putting AGPART/FBCON/RADEON in kernel or as modules, tried with and without OFFB and so on, same results. Also attaching output of lspci and .config used for the dmesg trace and output of radeontool regs '*'.