G4 Mac mini Radeon 9200: How to Enable 3d-Acceleration

[aectow]

Hello there,

I am using Ubuntu 10.10 on my G4 Mac mini. Almost everything worked out of the box and some issued I was able to fix with the help of forum contents, but to enable the hardware acceleration of the Radeon 9200, 32MB I really need your help.

Thanks to the support in other forums I
- tried several xorg.conf standards for radeon (http://mac.linux.be/content/xorgconf-files)
- forced the chipset in the xorg.conf (ChipID 0x514D)
- tried this http://blog.kosmokaryote.org/2010/05...mini-with.html
- removed all graphic drivers leaving only the xserver-xorg-video-radeon.

But still glxinfo tells me that rendering is enabled, but glxgears runs only with 90fps and when I start driconf I get: Screen "0" is not direct rendering capable.

Would be really thankful if someone could help me with this issue.
Thanks

Here my actual xorg.conf:

Section "Module"
  Load         "dri"
  Load         "dbe"
  Load         "freetype"
  Load         "extmod"
  Load         "glx"
EndSection

Section "Monitor"
  Identifier   "Monitor0"
  VendorName   "Monitor Vendor"
  ModelName    "T17-1"
  DisplaySize  340        270
  HorizSync    31.0 - 81.0
  VertRefresh  56.0 - 76.0
  Option      "dpms"
EndSection

Section "Device"
  Identifier  "Card0"
  Driver      "radeon"
  ChipID      0x514D
  Option      "UseFBDev"        "on"
  Option      "RenderAccel"     "on"
  Option      "AGPFastWrite"    "on"
  Option      "EnablePageFlip"  "on"
  Option      "AGPMode"         "4"
EndSection

Section "Screen"
  Identifier "Screen0"
  Device     "Card0"
  Monitor    "Monitor0"
  DefaultDepth     24
    SubSection "Display"
      Viewport   0 0
      Depth      24
      Virtual    1280 1024
    EndSubSection
EndSection

Section "DRI"
  Group           "video"
  Mode            0660
EndSection

[agd5f]

Pastebin your xorg log and dmesg, or better yet, file a bug:
https://bugs.freedesktop.org and attach your xorg log and dmesg.

[aectow]

Pastebin your xorg log and dmesg, or better yet, file a bug:
https://bugs.freedesktop.org and attach your xorg log and dmesg.

http://bugs.freedesktop.org/show_bug.cgi?id=31298

Thank you for your help

[aectow]

On bugs.freedesktop.org I was told that my problem was due to the incompatibility between radeonfs and KMS, both activated.
After disabling KMS adding radeon.modeset=0 to the kernel-options the 3d acceleration was enabled.
Glxgears had now 10 times more fps...

...but after some testing, I recognize that 3d acceleration may be enabled but is broken.
If I activate visual effets for the gnome session, I got strange colours but no visual effects. Same for 3d-accelerated games which go really slow.

In dmesg I get: radeonfb invalid ROM contents.

I found a similar bug and for them worked adding Option "BusType" "PCI" to the xorg.conf ... but for me it changed nothing.

You can find the complete dmesg and var.log on On bugs.freedesktop.org

Thank you for your help

[agd5f]

Probably endian bugs in the 3D driver.

[RobbieAB]

If it is an endianness bug, will it impact PPC64 on a G5?

[aectow]

Can I do anything about it?