On 10/03/2016 08:39 PM, Mathieu Malaterre wrote: > However step (2) above fails as explained in #826629. Thus I fear > CONFIG_FB_RADEON=m only fixes the *symptoms*. I would really > appreciate if you could confirm that `radeonfb` properly works on your > Mac Mini G4.
I wasn't using radeonfb on my Mac Mini G4 at all but just the radeon module. I also tested that on an iBook G3 with Radeon chipset as well as on a Powerbook G4 aluminum. In fact, once radeonfb has been loaded once, the radeon KMS module can no longer be loaded correctly and X.Org doesn't work. Reciting my results from back then [1]: =============================================================================== Kernels tested: * Linux 3.16.7-ck2 and Linux 3.18.0. Hardware tested: * Apple Mac Mini G4 (Radeon 9200) * Apple Powerbook G4 (Radeon 9600 PRO Turbo) * Apple iBook G3 (Rage Mobility 128 AGP) Results before changes: * Graphics broken on Apple Mac Mini G4, both kernels, out-of-the-box, can be fixed by appending "video=radeonfb:off". * Graphics broken on Apple PowerBook G4, both kernels, out-of-the-box, can be fixed by appending "video=radeonfb:off". * Graphics work on Apple iBook G3, both kernels, out-of-the-box. Changes: * CONFIG_FB_RADEON=y was changed to CONFIG_FB_RADEON=m. Results: * Graphics work on Apple Mac Mini G4, both kernels, out-of-the-box, no additional kernel parameters required. * Graphics work on Apple PowerBook G4, both kernels, out-of-the-box, no additional kernel parameters required. * Graphics work on Apple iBook G3, both kernels, out-of-the-box. Remarks: * Backlight dimming control works on both laptops in this configuration. Brightness can be dimmed from 0% to 100% smoothly. No other side effects observed, graphics and display controls on both laptops and the Mac Mini work as expected. Conclusion: * Please set CONFIG_FB_RADEON=m on powerpc32. =============================================================================== Cheers, Adrian > [1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=748398#106 -- .''`. John Paul Adrian Glaubitz : :' : Debian Developer - glaub...@debian.org `. `' Freie Universitaet Berlin - glaub...@physik.fu-berlin.de `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
