# Problems with SDL Doom/SDL Quake and Fullscreen mode

**URL:** <https://discourse.libsdl.org/t/problems-with-sdl-doom-sdl-quake-and-fullscreen-mode/1816>\
**Category:** SDL Development\
**Created:** [February 20, 2000, 4:59pm UTC](https://discourse.libsdl.org/t/problems-with-sdl-doom-sdl-quake-and-fullscreen-mode/1816 "2000-02-20T16:59:46Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Kareem\_Dana](https://discourse.libsdl.org/letter_avatar_proxy/v4/letter/k/d6d6ee/32.png) [@Kareem\_Dana](https://discourse.libsdl.org/u/Kareem_Dana)\
**Post date:** [February 20, 2000, 4:59pm UTC](https://discourse.libsdl.org/t/problems-with-sdl-doom-sdl-quake-and-fullscreen-mode/1816/1 "2000-02-20T16:59:46Z")

</div>

Hello,

I downloaded and compiled your SDL Quake 1.0.9 port. It compiled correctly, but  
when I ran it I get this:  
PackFile: ./id1/pak0.pak : sound/ambience/swamp2.wav  
PackFile: ./id1/pak0.pak : sound/ambience/swamp1.wav  
Fatal signal: Segmentation Fault (SDL Parachute Deployed)

If I use a -nosound option, it still Seg Faults. No core is dumped.

Running sdlquake in gdb gives the following information about the crash.  
(gdb) file bin/sdlquake  
Reading symbols from bin/sdlquake…done.  
(gdb) run  
Starting program: /home/kcd/local/games/quake/bin/sdlquake  
Added packfile ./id1/pak0.pak (339 files)  
Added packfile ./id1/pak1.pak (85 files)  
PackFile: ./id1/pak1.pak : gfx/pop.lmp  
Playing registered version.  
PackFile: ./id1/pak0.pak : gfx.wad  
Console initialized.  
UDP Initialized  
Exe: 23:10:03 Feb 19 2000  
8.0 megabyte heap  
PackFile: ./id1/pak0.pak : gfx/palette.lmp  
PackFile: ./id1/pak0.pak : gfx/colormap.lmp  
600k surface cache  
writable code 80a07c8-80a0c48

Sound Initialization  
writable code 80a0e90-80a13b6  
writable code 809ec9b-809ef83  
PackFile: ./id1/pak0.pak : gfx/conback.lmp

Program received signal ?, Unknown signal.  
0x400d49c9 in \_\_sigsuspend (set=0xbffff7a8)  
at …/sysdeps/unix/sysv/linux/sigsuspend.c:48  
48 …/sysdeps/unix/sysv/linux/sigsuspend.c: No such file or directory.  
(gdb) next  
warning: Signal ? does not exist on this system.

If i run it with -nosound through gdb, I get:

Program received signal SIGSEGV, Segmentation fault.  
0x809fdef in BoxOnPlaneSide ()  
(gdb) next  
Single stepping until exit from function BoxOnPlaneSide,  
which has no line number information.  
Fatal signal: Segmentation Fault (SDL Parachute Deployed)

Program exited with code 0365.

Finally, using -fullscreen option corrupts the display and causes the monitor  
to report “No Input”, the keyboard freezes forcing me to reboot.

Secondly, your SDL Doom port works, except in fullscreen mode when it acts like  
sdl quake forcing a reboot. The only information from gdb is the same  
sigsuspend.c error, I reported above.

Also, Any other SDL Game (Specifcally descent 1 and descent 2) when I run them  
in fullscreen mode and they crash for whatever reason, my X screen resolution  
is not set back to its normal resolution. Is there anyway to fix that problem  
without having to restart X?

I am using SDL 1.0.4, glibc 2.1.2, kernel 2.2.14. All the test programs that  
came with SDL compiled and ran correctly. Also your sdl port of lxdoom works  
fine in fullscreen mode, if that helps.

Regards,  
Kareem