diff --git a/src/debug.h b/src/debug.h
index b05da50..4a53801 100644
--- a/src/debug.h
+++ b/src/debug.h
@@ -11,15 +11,36 @@ namespace Debug {
     static GLuint font;
 
     void init() {
-        font = glGenLists(256);
-        HDC hdc = GetDC(0); 
-        HFONT hfont = CreateFontA(-MulDiv(10, GetDeviceCaps(hdc, LOGPIXELSY), 72), 0,
-                                 0, 0, FW_BOLD, 0, 0, 0,
-                                 ANSI_CHARSET, OUT_TT_PRECIS, CLIP_DEFAULT_PRECIS,
-                                 ANTIALIASED_QUALITY, DEFAULT_PITCH, "Courier New");
-        SelectObject(hdc, hfont);
-        wglUseFontBitmaps(hdc, 0, 256, font);
-        DeleteObject(hfont);
+        #ifdef WIN32
+            font = glGenLists(256);
+            HDC hdc = GetDC(0);
+            HFONT hfont = CreateFontA(-MulDiv(10, GetDeviceCaps(hdc, LOGPIXELSY), 72), 0,
+                                     0, 0, FW_BOLD, 0, 0, 0,
+                                     ANSI_CHARSET, OUT_TT_PRECIS, CLIP_DEFAULT_PRECIS,
+                                     ANTIALIASED_QUALITY, DEFAULT_PITCH, "Courier New");
+            SelectObject(hdc, hfont);
+            wglUseFontBitmaps(hdc, 0, 256, font);
+            DeleteObject(hfont);
+        #elif LINUX
+            XFontStruct *fontInfo;
+            Font id;
+            unsigned int first, last;
+            fontInfo = XLoadQueryFont(glXGetCurrentDisplay(), "-adobe-times-medium-r-normal--17-120-100-100-p-88-iso8859-1");
+
+            if (fontInfo == NULL) {
+                LOG("no font found\n");
+            }
+
+            id = fontInfo->fid;
+            first = fontInfo->min_char_or_byte2;
+            last = fontInfo->max_char_or_byte2;
+
+            font = glGenLists(last + 1);
+            if (font == 0) {
+                LOG("out of display lists\n");
+            }
+            glXUseXFont(id, first, last - first + 1, font + first);
+        #endif
     }
 
     void free() {
@@ -557,10 +578,10 @@ namespace Debug {
                     uint32 data;
                     uint32 dataSize;
                 } header = {
-                        FOURCC("RIFF"), sizeof(Header) - 8 + dataSize,
+                        FOURCC("RIFF"), (uint32) sizeof(Header) - 8 + dataSize,
                         FOURCC("WAVE"), FOURCC("fmt "), 16,
                         { 1, 1, 44100, 44100 * 16 / 8, 0, 16 },
-                        FOURCC("data"), dataSize
+                        FOURCC("data"), (uint32) dataSize
                     };
 
                 fwrite(&header, sizeof(header), 1, f);
diff --git a/src/platform/nix/build.sh b/src/platform/nix/build.sh
index 9ebf532..000092d 100755
--- a/src/platform/nix/build.sh
+++ b/src/platform/nix/build.sh
@@ -1,2 +1,3 @@
+set -e
 clang++ -std=c++11 -Os -s -fno-exceptions -fno-rtti -ffunction-sections -fdata-sections -Wl,--gc-sections -DNDEBUG main.cpp ../../libs/stb_vorbis/stb_vorbis.c -I../../ -o../../../bin/OpenLara -lX11 -lGL -lm -lpthread -lpulse-simple -lpulse
 strip ../../../bin/OpenLara --strip-all --remove-section=.comment --remove-section=.note
diff --git a/src/platform/nix/main.cpp b/src/platform/nix/main.cpp
index 9675f7a..1f723b6 100644
--- a/src/platform/nix/main.cpp
+++ b/src/platform/nix/main.cpp
@@ -99,7 +99,25 @@ InputKey mouseToInputKey(int btn) {
     return ikNone;
 }
 
-void WndProc(const XEvent &e) {
+void toggle_fullscreen(Display* dpy, Window win) {
+    const size_t _NET_WM_STATE_TOGGLE=2;
+
+    XEvent xev;
+    Atom wm_state  =  XInternAtom(dpy, "_NET_WM_STATE", False);
+    Atom scr_full  =  XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
+
+    memset(&xev, 0, sizeof(xev));
+    xev.type = ClientMessage;
+    xev.xclient.window = win;
+    xev.xclient.message_type = wm_state;
+    xev.xclient.format = 32;
+    xev.xclient.data.l[0] = _NET_WM_STATE_TOGGLE;
+    xev.xclient.data.l[1] = scr_full;
+
+    XSendEvent(dpy, DefaultRootWindow(dpy), False, SubstructureNotifyMask, &xev);
+}
+
+void WndProc(const XEvent &e,Display*dpy,Window wnd) {
     switch (e.type) {
         case ConfigureNotify :
             Core::width  = e.xconfigure.width;
@@ -108,7 +126,7 @@ void WndProc(const XEvent &e) {
         case KeyPress   :
         case KeyRelease :
             if (e.type == KeyPress && (e.xkey.state & Mod1Mask) && e.xkey.keycode == 36) {
-                // TODO: windowed <-> fullscreen switch
+                toggle_fullscreen(dpy,wnd);
                 break;
             }
             Input::setDown(keyToInputKey(e.xkey.keycode), e.type == KeyPress);
@@ -183,7 +201,7 @@ int main() {
             XNextEvent(dpy, &event);
             if (event.type == ClientMessage && *event.xclient.data.l == WM_DELETE_WINDOW)
                 break;
-            WndProc(event);
+            WndProc(event,dpy,wnd);
         } else {
             int time = getTime();
             if (time <= lastTime)
diff --git a/src/utils.h b/src/utils.h
index faf123e..d55b9a7 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -7,7 +7,12 @@
 #include <float.h>
 
 #ifdef _DEBUG
-    #define debugBreak() _asm { int 3 }
+    #ifdef LINUX
+        #define debugBreak() raise(SIGTRAP);
+    #else
+        #define debugBreak() _asm { int 3 }
+    #endif
+
     #define ASSERT(expr) if (expr) {} else { LOG("ASSERT %s in %s:%d\n", #expr, __FILE__, __LINE__); debugBreak(); }
 
     #ifndef ANDROID