Disabling EXA

[Alex Deucher]

On Sat, Nov 26, 2011 at 10:33 AM, Christoph Bartoschek
<bartoschek at or.uni-bonn.de> wrote:
> Hi,
>
> how can I disable EXA and use XAA? I am on opensuse and added the following
> section to /etc/X11/xorg.conf.d/50-device.conf:
>
> Section "Device"
>  Option "AccelMethod" "xaa"
>  Identifier "Default Device"
> EndSection
>
> Xorg reads the file because it says in its logfile:
>
> [    21.481] (==) RADEON(0): Depth 24, (--) framebuffer bpp 32
> [    21.481] (II) RADEON(0): Pixel depth = 24 bits stored in 4 bytes (32 bpp
> pixmaps)
> [    21.481] (==) RADEON(0): Default visual is TrueColor
> [    21.481] (**) RADEON(0): Option "AccelMethod" "xaa"
> [    21.481] (==) RADEON(0): RGB weight 888
> [    21.481] (II) RADEON(0): Using 8 bits per RGB (8 bit DAC)
> [    21.481] (--) RADEON(0): Chipset: "ATI Radeon Mobility X300 (M22) 5460
> (PCIE)" (ChipID = 0x5460)
> [    21.481] (II) RADEON(0): PCIE card detected
>
> But EXA is still used:
>
> [    21.481] (II) Loading sub module "exa"
> [    21.481] (II) LoadModule: "exa"
> [    21.482] (II) Loading /usr/lib/xorg/modules/libexa.so
> [    21.488] (II) Module exa: vendor="X.Org Foundation"
> [    21.488]    compiled for 1.10.4, module version = 2.5.0
> ...
> [    21.575] (II) RADEON(0): EXA: Driver will allow EXA pixmaps in VRAM
> ...
> [    21.635] (II) RADEON(0): Setting EXA maxPitchBytes
> [    21.635] (II) EXA(0): Driver allocated offscreen pixmaps
> [    21.635] (II) EXA(0): Driver registered support for the following
> operations:
> [    21.635] (II)         Solid
> [    21.635] (II)         Copy
> [    21.635] (II)         Composite (RENDER acceleration)
> [    21.635] (II)         UploadToScreen
> [    21.635] (II)         DownloadFromScreen
>
>
> How can I disable EXA and use XAA?. I suspect EXA to be responsible for a
> huge performance regression.

XAA is not compatible with KMS.

Alex