[cluster@node0 ~]$ /usr/lib/xscreensaver/glsnake 

X error in glsnake:
X Error of failed request:  BadMatch (invalid parameter attributes)
  Major opcode of failed request:  144 (GLX)
  Minor opcode of failed request:  5 (X_GLXMakeCurrent)
  Serial number of failed fdfffrequest:  132
  Current serial number in output stream:  132
Locking assertion failure.  Backtrace:
#0 /usr/lib/libxcb-xlib.so.0 [0xb71b4767]
#1 /usr/lib/libxcb-xlib.so.0(xcb_xlib_lock+0x2e) [0xb71b481e]
#2 /usr/lib/libX11.so.6 [0xb7cfce08]
#3 /usr/lib/libX11.so.6(XESetCloseDisplay+0x31) [0xb7ce05e1]
#4 /usr/lib/libGL.so.1 [0xb7eeb4d5]
#5 /lib/libc.so.6(exit+0xd4) [0xb7b69d44]
#6 /usr/lib/xscreensaver/glsnake [0x804de38]
#7 /usr/lib/libX11.so.6(_XError+0xd3) [0xb7cf6053]
#8 /usr/lib/libX11.so.6(_XReply+0x231) [0xb7cfdbc1]
#9 /usr/lib/libGL.so.1 [0xb7eedd49]
this is also not the original ISA coursework exam for it as it was not made like is.