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Massimo B.
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PostPosted: Thu Nov 15, 2007 9:42 pm    Post subject: PowerBook5,8/Ati Xorg DeviceSection tweaks Reply with quote

Hello.

Is there anything I can tweak about
/etc/X11/xorg.conf:
Section "Device"
        Identifier      "Card0"
        Driver          "radeon"
        ### Configured ATI Radeon NP at PCI Bus ID:
        # BusID         "PCI:0:16:0"

        ### Set driver options:
        Option          "EnablePageFlip"        "true"  # Increases Performance
        Option          "MergedFB"              "false" # Set to true if you want mirrored monitor output

        ### Unchanged, default driver options:
        Option          "AccelMethod"   "EXA"   # XAA or EXA, but EXA is unstable"
        Option          "AGPMode"       "8"     # Set to the AGP bus speed, 1 = 1x
        Option          "AGPFastWrite"  "true"  # Can be unstable
        # Option        "BackingStore"  "true"  # Currently broken
        # Option        "BIOSHotkeys"   "false" # Enable this to switch outputs with a hotkey
        # Option        "BusType"       "auto"  # Force Video Bus to PCI, AGP or PCIE
        # Option        "MonitorLayout" "auto"  # Set to TMDS for some Apple Flat Panels
        # Option        "NoAccel"       "false" # Disables ALL hardware acceleration
        Option          "RenderAccel"   "true"  # Hardware Render Acceleration"
        # Option        "ReverseDDC"    "false" # Some G5s require this
        # Option        "SWcursor"      "false"
        # Option        "UseFBDev"      "false" # Try enabling this if it does not work

        ### See "man radeon" for more information and options
EndSection

Section "Extensions"
        Option "Composite" "Enable"
EndSection

I thought the PowerBook could be strong enough for the fancy KDE fading/transparency/shadow effects, but it is far too slow.

Or is this kde feature (3.5.7) just too young or the machine just too slow?
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JoseJX
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PostPosted: Fri Nov 16, 2007 1:30 am    Post subject: Reply with quote

I'm pretty sure the problem is that Render Acceleration still isn't enabled on newer Radeon cards still, causing the slow drawing of effects that you're seeing. I'm not sure how much more work is required for this, I haven't been following development, but the freedesktop website would probably be a good place to look.
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Massimo B.
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PostPosted: Fri Nov 16, 2007 9:45 pm    Post subject: Reply with quote

Right, rendering seems to be disabled:
Code:
# cat /var/log/Xorg.0.log |grep DRI
(II) Loading extension XFree86-DRI
(II) RADEON(0): [dri] Found DRI library version 1.3.0 and kernel module version 1.27.0
(**) RADEON(0): DRI New memory map param
(**) RADEON(0): DRI Finishing init !
(II) RADEON(0): [DRI] installation complete
(WW) RADEON(0): DRI init changed memory map, adjusting ...
(II) GLX: Initialized DRI GL provider for screen 0

# cat /var/log/Xorg.0.log |grep DRM
(II) RADEON(0): [drm] DRM interface version 1.3
(II) RADEON(0): [drm] installed DRM signal handler

# cat /var/log/Xorg.0.log |grep Render
        X.Org Font Renderer : 0.5
        Module class: X.Org Font Renderer
        ABI class: X.Org Font Renderer, version 0.5
        Module class: X.Org Font Renderer
        ABI class: X.Org Font Renderer, version 0.5
(**) RADEON(0): Option "RenderAccel" "true"
(II) RADEON(0): Render acceleration unsupported on R300 type cards and newer.

But I found the r300 project (latest update July 2005 ?) and a howto
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JoseJX
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PostPosted: Sat Nov 17, 2007 12:13 am    Post subject: Reply with quote

This isn't the same thing. The Render Acceleration is for 2D acceleration, the r300 project is for 3D support. Sorry. :| You may want to try an unstable driver if you're not already, since it may improve performance.
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Massimo B.
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PostPosted: Sat Nov 17, 2007 9:30 am    Post subject: Reply with quote

I didn't know about that difference. When reading about DRI they talk about Rendering and Hardware acceleration.
Why says man radeon
    R300 Radeon 9700PRO/9700/9500PRO/9500/9600TX, FireGL X1/Z1 (2D only)
but has DRI/DRM enabled (which is 3D) but not as you say 2D Rendering?
/var/log/Xorg.0.log:
(II) RADEON(0): Render acceleration unsupported on R300 type cards and newer.

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JoseJX
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PostPosted: Sun Nov 18, 2007 11:35 pm    Post subject: Reply with quote

RenderAcceleration speeds up the XAA/EXA components, which are responsible for displaying the 2D images on the screen. DRI is responsible for accelerating the rendering of 3D graphics using OpenGL. Hope that clarifies it. :)
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