On Mon, Jan 21, 2013 at 10:51:43PM -0800, Paul Rogers wrote:
> So, it proceeded without incident, and X runs without 
> a hardware compatibility problems, i.e. MTRR errors.
> There's one small issue left, but I think it's probably 
> something to ask XOrg about.  (I didn't feel Xinerama
> was something I could use.  But if anyone has an
> idea....  TIA).
> 
> (II) LoadModule: "dri"
> (II) Loading /usr/lib/X11/modules/extensions//libdri.so
> dlopen: /usr/lib/X11/modules/extensions//libdri.so: undefined symbol:
> noPanoramiXExtensiond to load /usr/lib/X11/modules/extensions//libdri.so
> (II) UnloadModule: "dri"
> (EE) Failed to load module "dri" (loader failed, 7)
> ...
> (EE) AIGLX: DRI module not loaded
> 
 PanoramiX certainly sounds like something related to Xinerama.

I've never used multiple monitors, but Xinerama has always been part
of X so I've always built libXinerama.  If you omit expected
dependencies, you get problems.  I think that BLFS has always
included everything from xorg - you can omit *some* of the
"applications", and omit the core fonts (only use TTF/OTF fonts)
without significant issues.  But omitting any of the libraries is not
a great idea - I'm sure that some of them can be dropped for certain
use cases, but testing the resulting build and fixing up any problems
is not worth the effort.

 Actually, I think I saw reports of this problem (AIGLX needs
Xinerama, which the distro had omitted) on one minor distro when I
was searching for something else last week.

 So, if you want dri I guess you need to rebuild xorg.

ĸen
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