Full traceback:
  File "renpy/common/00start.rpy", line 198, in script call
    call _gl_test
  File "renpy/common/00gltest.rpy", line 441, in script
    $ __gl_test()
  File "/home/kisik21/renpy-6.99.14.3-sdk/renpy/ast.py", line 862, in execute
    renpy.python.py_exec_bytecode(self.code.bytecode, self.hide, store=self.store)
  File "/home/kisik21/renpy-6.99.14.3-sdk/renpy/python.py", line 1888, in py_exec_bytecode
    exec bytecode in globals, locals
  File "renpy/common/00gltest.rpy", line 441, in <module>
    $ __gl_test()
  File "renpy/common/00gltest.rpy", line 359, in _m1_00gltest__gl_test
    _gl_performance_test()
  File "renpy/common/00gltest.rpy", line 384, in _gl_performance_test
    ui.interact(suppress_underlay=True, suppress_overlay=True)
  File "/home/kisik21/renpy-6.99.14.3-sdk/renpy/ui.py", line 287, in interact
    rv = renpy.game.interface.interact(roll_forward=roll_forward, **kwargs)
  File "/home/kisik21/renpy-6.99.14.3-sdk/renpy/display/core.py", line 2603, in interact
    self.start()
  File "/home/kisik21/renpy-6.99.14.3-sdk/renpy/display/core.py", line 1760, in start
    self.set_mode()
  File "/home/kisik21/renpy-6.99.14.3-sdk/renpy/display/core.py", line 2002, in set_mode
    raise Exception("Could not set video mode.")
Exception: Could not set video mode.

While running game code:
  File "renpy/common/00start.rpy", line 198, in script call
    call _gl_test
  File "renpy/common/00gltest.rpy", line 441, in script
    $ __gl_test()
  File "renpy/common/00gltest.rpy", line 441, in <module>
    $ __gl_test()
  File "renpy/common/00gltest.rpy", line 359, in _m1_00gltest__gl_test
    _gl_performance_test()
  File "renpy/common/00gltest.rpy", line 384, in _gl_performance_test
    ui.interact(suppress_underlay=True, suppress_overlay=True)
Exception: Could not set video mode.

Full traceback:
  File "/home/kisik21/renpy-6.99.14.3-sdk/renpy/bootstrap.py", line 306, in bootstrap
    renpy.main.main()
  File "/home/kisik21/renpy-6.99.14.3-sdk/renpy/main.py", line 513, in main
    run(restart)
  File "/home/kisik21/renpy-6.99.14.3-sdk/renpy/main.py", line 139, in run
    renpy.execution.run_context(True)
  File "/home/kisik21/renpy-6.99.14.3-sdk/renpy/execution.py", line 846, in run_context
    context.run()
  File "renpy/common/00start.rpy", line 198, in script call
    call _gl_test
  File "renpy/common/00gltest.rpy", line 441, in script
    $ __gl_test()
  File "/home/kisik21/renpy-6.99.14.3-sdk/renpy/ast.py", line 862, in execute
    renpy.python.py_exec_bytecode(self.code.bytecode, self.hide, store=self.store)
  File "/home/kisik21/renpy-6.99.14.3-sdk/renpy/python.py", line 1888, in py_exec_bytecode
    exec bytecode in globals, locals
  File "renpy/common/00gltest.rpy", line 441, in <module>
    $ __gl_test()
  File "renpy/common/00gltest.rpy", line 359, in _m1_00gltest__gl_test
    _gl_performance_test()
  File "renpy/common/00gltest.rpy", line 384, in _gl_performance_test
    ui.interact(suppress_underlay=True, suppress_overlay=True)
  File "/home/kisik21/renpy-6.99.14.3-sdk/renpy/ui.py", line 287, in interact
    rv = renpy.game.interface.interact(roll_forward=roll_forward, **kwargs)
  File "/home/kisik21/renpy-6.99.14.3-sdk/renpy/display/core.py", line 2603, in interact
    self.start()
  File "/home/kisik21/renpy-6.99.14.3-sdk/renpy/display/core.py", line 1760, in start
    self.set_mode()
  File "/home/kisik21/renpy-6.99.14.3-sdk/renpy/display/core.py", line 2002, in set_mode
    raise Exception("Could not set video mode.")
Exception: Could not set video mode.

While running game code:
  File "renpy/common/00start.rpy", line 198, in script call
    call _gl_test
  File "renpy/common/00gltest.rpy", line 441, in script
    $ __gl_test()
  File "renpy/common/00gltest.rpy", line 441, in <module>
    $ __gl_test()
  File "renpy/common/00gltest.rpy", line 359, in _m1_00gltest__gl_test
    _gl_performance_test()
  File "renpy/common/00gltest.rpy", line 384, in _gl_performance_test
    ui.interact(suppress_underlay=True, suppress_overlay=True)
Exception: Could not set video mode.