render error with XAA

[Alex Deucher]

On Mon, Nov 2, 2009 at 7:54 PM, Che-Wei Chang <mailcwc at gmail.com> wrote:
> As the bug, very poor Xorg performance on various older graphics HW -
> XAA solves this, described in the following link:
>
> https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/363238
>
> I enabled XAA option in xorg.conf. However, I got render errors in
> some applications.
> 1. The system monitor only shows the top left cornor around the GMail
> logo in the following picture.
>   http://farm3.static.flickr.com/2779/4062950845_ab86ca3dc4_b.jpg
>
> 2. With system monitor on the top, when I drag the program, Take
> ScreenShot, the screen does not refresh correctly.
>   There are several ghost shadow left behind.
>   http://farm3.static.flickr.com/2714/4062950949_c12dfaff3e_b.jpg
>
> 3. The characters in PCManX are truncated.
>   http://farm3.static.flickr.com/2542/4062951027_8715e56332_b.jpg
>
> Following is my xorg.conf, is there any option that can work around this issue?
>

Option "RenderAccel" "off"
might help.  XAA is getting more and more bitrotten.  The real
solution will be to migrate to KMS.

Alex


>
> Section "Screen"
>       Identifier      "Configured Screen Device"
>       Device  "Configured Video Device"
>       SubSection "Display"
>               Virtual 2624 1200
>       EndSubSection
> EndSection
>
> Section "Device"
>       Identifier      "Configured Video Device"
>       Option "Monitor-LVDS" "T42"
>       Option "Monitor-DVI-0" "2007FP"
>       Option "RenderAccel" "on"
>       Option "AGPMode" "4"
>       Option "FBTexPercent" "0"
>       Option "AccelMethod" "XAA"
>       # Option "AccelDFS" "on"
>       # Option "MigrationHeuristic" "smart" # "greedy" works well also
>       # Option "XAANoOffscreenPixmaps" "true"
>       # Option "EnablePageFlip" "on"
>       # Option "EnableDepthMoves" "on"
>       # Option "ColorTiling" "on"
> EndSection
>       # Option "NoAccel" "TRUE"
>       # Option "DisplayPriority" "HIGH"
>
> Section "Monitor"
>       Identifier "2007FP"
>       Modeline     "1600x1200_60.00" 139.800 1600 1640 1672 1864 1200 1201
> 1204 1250 +hsync +vsync
>       Option      "dpms"
>       HorizSync       30.0 - 81.0
>       VertRefresh     56.0 - 76.0
>       Option          "PreferredMode" "1600x1200_60.00"
>       # Option          "ReducedBlanking"
>       # Option      "DDCMode" "off"
> EndSection
>
>
> Section "Monitor"
>       Identifier "T42"
>       # Option "RightOf" "2007FP"
> EndSection
>
> # Section "Module"
> #         Load "glx"
> #         Load "dri"
> # EndSection
>
> # Section "DRI"
> #         Mode 0666
> # EndSection
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