New Shell process 9
9.Tools:Games/Debug/PrboomGL> execute Start-1024x768 

prboom OS4 v2.5.1 OS4 Midi (http://prboom.sourceforge.net/)
M_LoadDefaults: Load system defaults.
 default file: PROGDIR:prboom.cfg
 found PROGDIR:DOOM2.WAD
IWAD found: PROGDIR:DOOM2.WAD
PrBoom (built Jan 13 2010), playing: DOOM 2: Hell on Earth
PrBoom is released under the GNU General Public license v2.0.
You are welcome to redistribute it under certain conditions.
It comes with ABSOLUTELY NO WARRANTY. See the file COPYING for details.
V_Init: allocate screens.
 found PROGDIR:prboom.wad
D_InitNetGame: Checking for network game.
W_Init: Init WADfiles.
 adding PROGDIR:DOOM2.WAD
 adding PROGDIR:prboom.wad
W_InitCache

M_Init: Init miscellaneous info.
R_Init: Init DOOM refresh daemon - 
R_LoadTrigTables: Endianness...corrected.
R_InitData: Textures Flats Sprites Tranmap build [........]
R_Init: R_InitPlanes R_InitLightTables R_InitSkyMap R_InitTranslationsTables R_InitPatches 
P_Init: Init Playloop state.
I_Init: Setting up machine state.
I_InitSound:  configured audio device with 1024 samples/slice
I_InitSound: sound module ready
S_Init: Setting up sound.
S_Init: default sfx volume 8
HU_Init: Setting up heads up display.
I_InitGraphics: 1024x768
I_UpdateVideoMode: 1024x768 (nofullscreen)
V_InitMode: using OpenGL video mode
I_SetRes: Using resolution 1024x768
Couldn't set 1024x768 video mode [Failed to create MiniGL context]
I_ShutdownMusic: removing PROGDIR:
I_ShutdownSound: 
9.Tools:Games/Debug/PrboomGL>