sony-vaio-z-series team mailing list archive

[Bernd Eggink <monoped@xxxxxxxxxx>]

Norbert Preining schrieb:
> Hi all,
>
> I have experienced regular breakage of OpenGL programs due to the
> following reason: Following the tutorial on switching graphics cards
> we have
> 	/usr/lib/libGL.so.1.INTEL	(intel)
> 	/usr/lib/libGL.so.185.NN.MM	(nvidia)
> The current code from the tutorial (switch-graphics init file) does:
> 	ln -sf /usr/lib/libGL.so.1.INTEL /usr/lib/libGL.so.1
> in the Intel case.
>
> Now the problem is that 185 > 1, so calling ldconfig will revert that
> change. So after running ldconfig we have
> 	/usr/lib/libGL.so.1 -> libGL.so.185.NN.MM
> although running Intel card.
>
> I have changed the code as follows: In both cases we create a link
> 	/usr/lib/libGL.so.100000 -> libGL.so.1.INTEL
> or
> 	/usr/lib/libGL.so.100000 -> libGL.so.185.NN.MM
> and then a link
> 	/usr/lib/libGL.so.1      -> libGL.so.10000

I think a permanent static link

	/usr/lib/libGL.so.1 -> /usr/lib/libGL.so.100000

would be sufficient here. The 2 lines

	ln -sf /usr/lib/libGL.so.100000 /usr/lib/libGL.so.1

could then be omitted from the script.

I'd also recommend not to use the name 'libGL.so.1.INTEL'. It looks
nice, but the next time you install a new nvidia driver, the installer
will consider this file an obsolete library and delete it without
asking. Simple names like NVIDIA, however, are left intact.

Regards,
Bernd

--
Bernd Eggink
http://sudrala.de