Sam Lantinga wrote:
What’s the output of xdpyinfo for your system?
Right here it all is, it’s really long so I hope you don’t mind too much…----------------------------------------------------------------
name of display: :0.0
version number: 11.0
vendor string: Silicon Graphics
vendor release number: 6300
maximum request size: 262140 bytes
motion buffer size: 0
bitmap unit, bit order, padding: 32, MSBFirst, 32
image byte order: MSBFirst
number of supported pixmap formats: 5
supported pixmap formats:
depth 1, bits_per_pixel 1, scanline_pad 32
depth 8, bits_per_pixel 8, scanline_pad 32
depth 12, bits_per_pixel 16, scanline_pad 32
depth 15, bits_per_pixel 16, scanline_pad 32
depth 24, bits_per_pixel 32, scanline_pad 32
keycode range: minimum 15, maximum 149
focus: window 0x4000004, revert to PointerRoot
number of extensions: 28
Adobe-DPS-Extension
DCShare
DEC-XTRAP
DOUBLE-BUFFER
DPSExtension
Extended-Visual-Information
GLX
LBX
MIT-SHM
MIT-SUNDRY-NONSTANDARD
Multi-Buffering
READDISPLAY
RECORD
ReadDisplay
SCREEN-SAVER
SGI-NewMultibuffering
SGI-SCREEN-CAPTURE
SGI-SUNDRY-NONSTANDARD
SGI-VIDEO-CONTROL
SGIFullScreenStereo
SHAPE
SYNC
XC-APPGROUP
XC-MISC
XInputExtension
XKEYBOARD
XTEST
XVideo
default screen number: 0
number of screens: 1
screen #0:
dimensions: 1280x1024 pixels (293x234 millimeters)
resolution: 111x111 dots per inch
depths (5): 1, 8, 12, 15, 24
root window id: 0x40
depth of root window: 8 planes
number of colormaps: minimum 1, maximum 11
default colormap: 0x3d
default number of colormap cells: 256
preallocated pixels: black 0, white 7
options: backing-store NO, save-unders NO
largest cursor: 32x32
current input event mask: 0x72003c
ButtonPressMask ButtonReleaseMask EnterWindowMask
LeaveWindowMask StructureNotifyMask SubstructureRedirectMask
FocusChangeMask PropertyChangeMask
number of visuals: 26
default visual id: 0x20
visual:
visual id: 0x20
class: PseudoColor
depth: 8 planes
available colormap entries: 256
red, green, blue masks: 0x0, 0x0, 0x0
significant bits in color specification: 8 bits
visual:
visual id: 0x21
class: PseudoColor
depth: 8 planes
available colormap entries: 256
red, green, blue masks: 0x0, 0x0, 0x0
significant bits in color specification: 8 bits
visual:
visual id: 0x22
class: StaticColor
depth: 8 planes
available colormap entries: 256
red, green, blue masks: 0xe0, 0x1c, 0x3
significant bits in color specification: 8 bits
visual:
visual id: 0x23
class: TrueColor
depth: 8 planes
available colormap entries: 8 per subfield
red, green, blue masks: 0xe0, 0x1c, 0x3
significant bits in color specification: 8 bits
visual:
visual id: 0x24
class: TrueColor
depth: 8 planes
available colormap entries: 8 per subfield
red, green, blue masks: 0xe0, 0x1c, 0x3
significant bits in color specification: 8 bits
visual:
visual id: 0x25
class: PseudoColor
depth: 8 planes
available colormap entries: 256
red, green, blue masks: 0x0, 0x0, 0x0
significant bits in color specification: 8 bits
visual:
visual id: 0x26
class: PseudoColor
depth: 12 planes
available colormap entries: 4096
red, green, blue masks: 0x0, 0x0, 0x0
significant bits in color specification: 8 bits
visual:
visual id: 0x27
class: PseudoColor
depth: 12 planes
available colormap entries: 4096
red, green, blue masks: 0x0, 0x0, 0x0
significant bits in color specification: 8 bits
visual:
visual id: 0x28
class: PseudoColor
depth: 12 planes
available colormap entries: 4096
red, green, blue masks: 0x0, 0x0, 0x0
significant bits in color specification: 8 bits
visual:
visual id: 0x29
class: PseudoColor
depth: 12 planes
available colormap entries: 4096
red, green, blue masks: 0x0, 0x0, 0x0
significant bits in color specification: 8 bits
visual:
visual id: 0x2a
class: PseudoColor
depth: 12 planes
available colormap entries: 4096
red, green, blue masks: 0x0, 0x0, 0x0
significant bits in color specification: 8 bits
visual:
visual id: 0x2b
class: PseudoColor
depth: 12 planes
available colormap entries: 4096
red, green, blue masks: 0x0, 0x0, 0x0
significant bits in color specification: 8 bits
visual:
visual id: 0x2c
class: TrueColor
depth: 15 planes
available colormap entries: 32 per subfield
red, green, blue masks: 0x7c00, 0x3e0, 0x1f
significant bits in color specification: 8 bits
visual:
visual id: 0x2d
class: TrueColor
depth: 15 planes
available colormap entries: 32 per subfield
red, green, blue masks: 0x7c00, 0x3e0, 0x1f
significant bits in color specification: 8 bits
visual:
visual id: 0x2e
class: TrueColor
depth: 15 planes
available colormap entries: 32 per subfield
red, green, blue masks: 0x7c00, 0x3e0, 0x1f
significant bits in color specification: 8 bits
visual:
visual id: 0x2f
class: TrueColor
depth: 15 planes
available colormap entries: 32 per subfield
red, green, blue masks: 0x7c00, 0x3e0, 0x1f
significant bits in color specification: 8 bits
visual:
visual id: 0x30
class: TrueColor
depth: 15 planes
available colormap entries: 32 per subfield
red, green, blue masks: 0x7c00, 0x3e0, 0x1f
significant bits in color specification: 8 bits
visual:
visual id: 0x31
class: TrueColor
depth: 15 planes
available colormap entries: 32 per subfield
red, green, blue masks: 0x7c00, 0x3e0, 0x1f
significant bits in color specification: 8 bits
visual:
visual id: 0x32
class: TrueColor
depth: 15 planes
available colormap entries: 32 per subfield
red, green, blue masks: 0x7c00, 0x3e0, 0x1f
significant bits in color specification: 8 bits
visual:
visual id: 0x33
class: TrueColor
depth: 15 planes
available colormap entries: 32 per subfield
red, green, blue masks: 0x7c00, 0x3e0, 0x1f
significant bits in color specification: 8 bits
visual:
visual id: 0x34
class: TrueColor
depth: 24 planes
available colormap entries: 256 per subfield
red, green, blue masks: 0xff, 0xff00, 0xff0000
significant bits in color specification: 8 bits
visual:
visual id: 0x35
class: TrueColor
depth: 24 planes
available colormap entries: 256 per subfield
red, green, blue masks: 0xff0000, 0xff00, 0xff
significant bits in color specification: 8 bits
visual:
visual id: 0x36
class: TrueColor
depth: 24 planes
available colormap entries: 256 per subfield
red, green, blue masks: 0xff0000, 0xff00, 0xff
significant bits in color specification: 8 bits
visual:
visual id: 0x37
class: TrueColor
depth: 24 planes
available colormap entries: 256 per subfield
red, green, blue masks: 0xff0000, 0xff00, 0xff
significant bits in color specification: 8 bits
visual:
visual id: 0x38
class: TrueColor
depth: 24 planes
available colormap entries: 256 per subfield
red, green, blue masks: 0xff0000, 0xff00, 0xff
significant bits in color specification: 8 bits
visual:
visual id: 0x39
class: DirectColor
depth: 24 planes
available colormap entries: 256 per subfield
red, green, blue masks: 0xff0000, 0xff00, 0xff
significant bits in color specification: 8 bits
If you could find somebody there who knows how to use a debugger and step
through the code to see where it crashes, that would be ideal. Otherwise
you can start inserting printf() statements into the code in SDL_video.c
to see how far it gets before crashing.
I filled the function SDL_VideoInit() with printf’s, but it never got that
far…
I’ve had a play around with the gdb debugger (not used it before so bare with
me), and it told me:-
warning: Signal ? does not exist on this system.
Then didn’t do anything else. Although this is probably me not knowing how to use
it. 
Anyway, I hope that may help a little. I’ve asked one of our lecturers to show me
how to use gdb, when I find more I’ll post you the results.
Regards,
Arthur Yarwood.