[MPlayer-dev-eng] Re: [PATCH] Document pixmap corruption issues with xvidix (was: Re: Damaged background in WindowMaker)

[Tobias Diedrich]

Arpi wrote:

> another, better workaround is limiting video mem size by a few (2-3) mb.
> at least for cards with lots of video memory - for example 28mb is enough
> for X (i have 32mb g400) so i never get mem corruption as x uses 0..27mb and
> mga_vid/vidix uses 28..31
> 
> afair it's somewhere in the faq too, for mga_vid

I could not find any mention in DOCS/faq.html or DOCS/video.html,
attached is an updated patch.

-- 
Tobias								PGP: 0x9AC7E0BC
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Index: main-ro/DOCS/video.html
===================================================================
RCS file: /cvsroot/mplayer/main/DOCS/video.html,v
retrieving revision 1.110
diff -u -r1.110 video.html
--- main-ro/DOCS/video.html	29 Oct 2002 23:37:45 -0000	1.110
+++ main-ro/DOCS/video.html	31 Oct 2002 22:00:09 -0000
@@ -851,7 +851,14 @@
 <UL>
   <LI>You can use standalone video output driver: <CODE>-vo xvidix</CODE><BR>
     This driver was developed as X11's front end to VIDIX technology.  It
-    requires X server and can work only under X server.</LI>
+    requires X server and can work only under X server. Note that, as it
+    directly accesses the hardware and circumvents the X driver, pixmaps
+    cached in the graphics card's memory may be corrupted. You can prevent
+    this by limiting the amount of video memory used by X with the XF86Config
+    option "VideoRam" in the device section. You should set this to the amount
+    of memory installed on your card minus 4MB. If you have less than 8MB of
+    video ram, you can use the option "XaaNoPixmapCache" in the screen section
+    instead.</LI>
   <LI>You can use VIDIX subdevice which was applied to several video output
     drivers, such as:<BR>
     <CODE>-vo vesa:vidix</CODE> (<B>Linux only</B>) and <CODE>-vo fbdev:vidix</CODE></LI>
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