9.04 / Mac Mini PPC 1.42 / RV280 / bad 3D performance

[Shazz.ng]

Hello,

I have installed U9.04, all went very well... except when running an OpenGL app.

As the screensavers were horribly slow too (and with a strange blue background) I tried glxgear and with the default small window I hardly reach 100 FPS.

It seems that the Radeon 9200/RV280 should reach 2000 FPS (http://www.free3d.org/).

So is there a special driver to install ?

my xorg.conf extract :

Section "Device"
Identifier "ATI Technologies Inc RV280 [Radeon 9200]"
Driver "ati"
BusID "PCI:0:16:0"
Option "UseFBDev" "false"
Option "AGPMode" "4"
Option "AGPFastWrite" "true"
EndSection
I tried to modify AGPFastWrite, UseFBDev,... no effect.

thanks in advance !

[colinhayes]

try Option "BusType" "PCI" as per https://wiki.ubuntu.com/PowerPCKnownIssues

[Shazz.ng]

Eh eh it looks it is a little more than "broken Desktop effects " !

So that's 5x better, about 500 FPs now, no more blue bakckground, but very glitchy (if you move the mouse, a window, whatever, it goes from 80 FPS to 1000 FPs if the gears are hidden) and unstable.

But far from 2000 FPs.... I tried some screensavers in fullscreen and that's still very slow.

Can I tweak something ? Or I won't do better ?


# xorg.conf (X.Org X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# Note that some configuration settings that could be done previously
# in this file, now are automatically configured by the server and settings
# here are ignored.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
# sudo dpkg-reconfigure -phigh xserver-xorg

Section "Files"
FontPath "/usr/share/X11/fonts/misc"
FontPath "/usr/share/X11/fonts/cyrillic"
FontPath "/usr/share/X11/fonts/100dpi/:unscaled"
FontPath "/usr/share/X11/fonts/75dpi/:unscaled"
FontPath "/usr/share/X11/fonts/Type1"
FontPath "/usr/share/X11/fonts/CID"
FontPath "/usr/share/X11/fonts/100dpi"
FontPath "/usr/share/X11/fonts/75dpi"
# paths to defoma fonts
FontPath "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
FontPath "/var/lib/defoma/x-ttcidfont-conf.d/dirs/CID"
EndSection


Section "Module"
Load "GLcore"
Load "i2c"
Load "bitmap"
Load "ddc"
Load "dri"
Load "extmod"
Load "freetype"
Load "glx"
Load "int10"
Load "type1"
Load "vbe"
EndSection


Section "Device"
Identifier "ATI Technologies, Inc. Radeon 9200 (RV280)"
Driver "ati"
BusID "PCI:0:16:0"
Option "UseFBDev" "false"
Option "AGPMode" "4"
Option "AGPFastWrite" "true"
Option "BusType" "PCI"
EndSection

Section "Monitor"
Identifier "Configured Monitor"
EndSection

Section "Screen"
Identifier "Default Screen"
Monitor "Configured Monitor"
Device "ATI Technologies, Inc. Radeon 9200 (RV280)"
DefaultDepth 24
SubSection "Display"
Depth 1
Modes "1280x1024" "1272x1017" "1024x768" "880x660" "800x600" "760x608" "720x400" "640x480"
EndSubSection
SubSection "Display"
Depth 4
Modes "1280x1024" "1272x1017" "1024x768" "880x660" "800x600" "760x608" "720x400" "640x480"
EndSubSection
SubSection "Display"
Depth 8
Modes "1280x1024" "1272x1017" "1024x768" "880x660" "800x600" "760x608" "720x400" "640x480"
EndSubSection
SubSection "Display"
Depth 15
Modes "1280x1024" "1272x1017" "1024x768" "880x660" "800x600" "760x608" "720x400" "640x480"
EndSubSection
SubSection "Display"
Depth 16
Modes "1280x1024" "1272x1017" "1024x768" "880x660" "800x600" "760x608" "720x400" "640x480"
EndSubSection
SubSection "Display"
Depth 24
Modes "1280x1024" "1272x1017" "1024x768" "880x660" "800x600" "760x608" "720x400" "640x480"
EndSubSection

EndSection

[Shazz.ng]

I have upgraded the kernel to 2.6.29.-3 and it works really better... 1300 FPS now...

I guess it could be more but should be enough for the moment !