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Re: Status of OpenGL on Mac

On 9/18/19 8:14 PM, Riccaro Mottola wrote:
first, I noticed something very strange: if I connect remotely to the PowerBook, then set DISPLAY :0 which shows things on the screen, glxgears run!

Running GL applications through X forwarding is completely different than
running them locally. When going over the network, there is no DRM and
hardware acceleration. You can take this as a measure.

Also, if GL would support rendering over the network, it would most likely
happen on the server (in X speech, i.e. the machine you are connecting from)
and not the PowerBook. But again, DRM does not work over the network.

But running it in a real local xterm, doesn't work. This is the crash:

Starting program: /usr/bin/glxgears
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/powerpc-linux-gnu/libthread_db.so.1".

Program received signal SIGILL, Illegal instruction.
0xb6c2c270 in ?? () from /usr/lib/powerpc-linux-gnu/dri/swrast_dri.so
(gdb) bt
#0  0xb6c2c270 in ?? () from /usr/lib/powerpc-linux-gnu/dri/swrast_dri.so
#1  0xb6c2c3e0 in ?? () from /usr/lib/powerpc-linux-gnu/dri/swrast_dri.so
#2  0xb77c0824 in __pthread_once_slow (once_control=0xb7217d74, init_routine=0xb6c2c380) at pthread_once.c:116
#3  0xb6c2c470 in ?? () from /usr/lib/powerpc-linux-gnu/dri/swrast_dri.so
#4  0xb649e7c4 in ?? () from /usr/lib/powerpc-linux-gnu/dri/swrast_dri.so
#5  0xb63ce628 in ?? () from /usr/lib/powerpc-linux-gnu/dri/swrast_dri.so
#6  0xb6496f8c in ?? () from /usr/lib/powerpc-linux-gnu/dri/swrast_dri.so
#7  0xb6496ce0 in ?? () from /usr/lib/powerpc-linux-gnu/dri/swrast_dri.so
#8  0xb63d1ff0 in ?? () from /usr/lib/powerpc-linux-gnu/dri/swrast_dri.so
#9  0xb63d0174 in ?? () from /usr/lib/powerpc-linux-gnu/dri/swrast_dri.so
#10 0xb7689cf0 in ?? () from /lib/powerpc-linux-gnu/libGLX_mesa.so.0
#11 0xb76781e0 in ?? () from /lib/powerpc-linux-gnu/libGLX_mesa.so.0
#12 0xb7671b48 in ?? () from /lib/powerpc-linux-gnu/libGLX_mesa.so.0
#13 0xb7672a7c in ?? () from /lib/powerpc-linux-gnu/libGLX_mesa.so.0
#14 0xb790489c in glXChooseVisual () from /lib/powerpc-linux-gnu/libGLX.so.0
#15 0x001e64b0 in glXChooseVisual () from /lib/powerpc-linux-gnu/libGL.so.1
#16 0x00402dc0 in ?? ()
#17 0x004014c8 in ?? ()
#18 0xb7b9cf74 in generic_start_main (main=0x401310, argc=1, argv=0xbffff4c4, auxvec=0xbffff56c, init=<optimized out>, rtld_fini=<optimized out>,

It looks like you are using software rendering anyway. What does "glxinfo"
say? Can you paste the output here?

Also, have you installed the firmware-amd-graphics package which contains
firmware necessary for many AMD/ATI cards? If I remember correctly, the
firmware is needed on the G4 laptops with a Radeon chipset.


 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz@debian.org
`. `'   Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
  `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913

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