Re: [bugle-users] Ubuntu 11.10 with nVidia: fall to indirect mode and OpenGL 1.4

[_ _ <fbe...@gm...>]

Great! It makes sense.

Let me know when you have the fix in the repository: I'll test it on
my machine before you roll out a release.

--
François Bertel

On Thu, Oct 20, 2011 at 11:27 AM, Bruce Merry <bm...@gm...> wrote:
> On 20 October 2011 19:26, _ _ <fbe...@gm...> wrote:
>> Hi Bruce,
>>
>> I actually found out what happens.
>>
>> 1. when glxinfo is run straight from the shell, it first looks for libGL.so.1
>> 2. when glxinfo is run through bugle, bugle first looks for libGL.so
>>
>> I figured this out by setting the environment variable LD_DEBUG to all
>> (see man ld.so for details) to trace what ld.so is doing.
>
> Nice!
>
> <snip>
>
>> So, that's the fault. I'm not sure what the right solution is:
>>
>> 1. I have to find out why the mesa package is required (probably some
>> dependencies)
>> 2. I have to find out why mesa is listed before nvidia in
>> /etc/ld.so.cache (what were the arguments passed to the last call to
>> ldconfig when /etc/ld/so.cache?, maybe there is something to look for
>> in the /etc/alternatives mechanism?)
>> 3. maybe bugle should try to look for libGL.so.1 instead of libGL.so?
>> 4. I'm pretty sure if I remove the mesa symlink libGL.so, I will have
>> the correct behavior but it looks hackish.
>
> I think the correct solution is  3: bugle should load libGL.so.1. That
> is the SONAME that applications will actually store in their ELF
> headers and which is used for dynamic linking, so BuGLe should match
> it. libGL.so is the name that the (build-time) linker seeks when given
> -lGL, but it then looks inside the library it finds the SONAME to use
> for dynamic linking.
>
> Bruce
> --
> Dr Bruce Merry
> bmerry <@> gmail <.> com
> http://www.brucemerry.org.za/
> http://blog.brucemerry.org.za/
>