Hi, On Mon, Sep 19, 2016 at 11:13 AM, Herminio Hernandez, Jr. <herminio.hernande...@gmail.com> wrote: > Apologies for the previous email. > > What I was trying to say was I just recently installed Debain on my PowerMac > G5. I upgraded to sid and install the nonfree firmware. After reboot I > noticed that GPU acclleration was broken and I recieved the following error > > [ 10.428542] [drm] Loading R300 Microcode > [ 10.486631] radeon 0000:f0:10.0: firmware: direct-loading firmware > radeon/R300_cp.bin > [ 10.486865] [drm] radeon: ring at 0x0000000000010000 > [ 10.634417] [drm:.r100_ring_test [radeon]] *ERROR* radeon: ring test > failed (scratch(0x15E4)=0xCAFEDEAD) > [ 10.634526] [drm:.r100_cp_init [radeon]] *ERROR* radeon: cp isn't working [...] > [ 11.935061] [drm] Forcing AGP to PCI mode
Well that is really odd. I am trying hard to push my pci patch upstream: https://patchwork.kernel.org/patch/9088181/ I do believe PCI mode always work, so I would be interested if you could report the bug upstream to have PCI mode work on all Powermac (AGP is know to be broken). Pay attention to your /etc/modules file check whether or not it contains a option for the loaded modules, eg: radeon.agpmode=-1 Finally your dmesg looks odd since the line `[drm] Forcing AGP to PCI mode` comes only after the first error. -M
