Okay. I managed to --force-depends install libgl1-mesa-dri_6.5.2-4,
libgl1-mesa-dri-dbg_6.5.2-4 and libdrm2_2.3.0-4. This surprisingly
gave me working hardware acceleration, although with severe graphical
errors. trackballs still shows the same behaviour, here is a backtrace:

Core was generated by `trackballs'.
Program terminated with signal 11, Segmentation fault.
#0  0xb71e0b54 in _save_upgrade_vertex (ctx=0x8157b38, attr=2, newsz=3)
    at tnl/t_save_api.c:406
406     tnl/t_save_api.c: No such file or directory.
        in tnl/t_save_api.c
(gdb) bt
#0  0xb71e0b54 in _save_upgrade_vertex (ctx=0x8157b38, attr=2, newsz=3)
    at tnl/t_save_api.c:406
#1  0xb71e169a in do_choose (attr=2, sz=3, 
    attr_func=0xb71df1a0 <save_attrib_2_3>, 
    choose1=0xb71e27e0 <save_choose_2_1>, 
    choose2=0xb71e2790 <save_choose_2_2>, 
    choose3=0xb71e2740 <save_choose_2_3>, 
    choose4=0xb71e26f0 <save_choose_2_4>, v=0xbfc1fcbc) at tnl/t_save_api.c:561
#2  0xb71e2783 in save_choose_2_3 (v=0xbfc1fcbc) at tnl/t_save_api.c:665
#3  0xb71de0e3 in _save_Normal3f (x=0, y=0, z=1) at tnl/t_save_api.c:840
#4  0xb7279ebc in loopback_Normal3dv (v=0xbfc1fe20) at main/api_loopback.c:387
#5  0xb7d1ed9a in glNormal3dv () from /usr/lib/libGL.so.1
#6  0x08056bd2 in ?? ()
#7  0x08057af4 in ?? ()
#8  0x0804e7e7 in ?? ()
#9  0x0804cc49 in ?? ()
#10 0xb7f005d2 in scm_boot_guile () from /usr/lib/libguile.so.12
#11 0x0804beca in ?? ()
#12 0xb7a02ea8 in __libc_start_main () from /lib/tls/libc.so.6
#13 0x0804bc61 in ?? ()
(gdb)

Is it still necessary to recompile trackballs?


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