the following improvements to linux-fbdev: 1. updated makefiles to build libOSMesa as well as libGL

these are improvements to fbdev-glut
1. mouse cursor will timeout and be invisible if not being used
2. do not restore colormaps to truecolor targets, this causes problems at
   exit on my g450
3. fixed a crash when cleaning up from failure by munmaping what had not
   yet been mmaped
4. Resize event handling is improved, the resize function is not invoked
   from a signal handler now.
5. The main loop can detect if it is running very fast (greater than 2khz)
6. keyboard up and special up events are generated from stdin input mode
   and if it is also not redrawing, it sleeps
7. corrections in escape sequences for function keys for stdin input

8 files changed, 248 insertions, 164 deletions

diff --git a/src/glut/fbdev/callback.c b/src/glut/fbdev/callback.c
index 946c8d8..8c039f5 100644
--- a/src/glut/fbdev/callback.c
+++ b/src/glut/fbdev/callback.c
@@ -74,19 +74,16 @@ void glutKeyboardUpFunc(void (*func)(unsigned char key, int x, int y))
 
 void glutMouseFunc(void (*func)(int button, int state, int x, int y))
 {
-   MouseEnabled = 1;
    MouseFunc = func;
 }
 
 void glutMotionFunc(void (*func)(int x, int y))
 {
-   MouseEnabled = 1;
    MotionFunc = func;
 }
 
 void glutPassiveMotionFunc(void (*func)(int x, int y))
 {
-   MouseEnabled = 1;
    PassiveMotionFunc = func;
 }
 
diff --git a/src/glut/fbdev/colormap.c b/src/glut/fbdev/colormap.c
index 3a81f93..3e72a7b 100644
--- a/src/glut/fbdev/colormap.c
+++ b/src/glut/fbdev/colormap.c
@@ -92,12 +92,18 @@ static void FillReverseColorMap(void)
 
 void RestoreColorMap(void)
 {
+   if(FixedInfo.visual == FB_VISUAL_TRUECOLOR)
+      return;
+
    if (ioctl(FrameBufferFD, FBIOPUTCMAP, (void *) &ColorMap) < 0)
       sprintf(exiterror, "ioctl(FBIOPUTCMAP) failed!\n");
 }
 
 void LoadColorMap(void)
 {
+   if(FixedInfo.visual == FB_VISUAL_TRUECOLOR)
+      return;
+
    ColorMap.start = 0;
    ColorMap.red   = RedColorMap;
    ColorMap.green = GreenColorMap;
diff --git a/src/glut/fbdev/cursor.c b/src/glut/fbdev/cursor.c
index 6cd087e..4bb2b7f 100644
--- a/src/glut/fbdev/cursor.c
+++ b/src/glut/fbdev/cursor.c
@@ -66,6 +66,9 @@ void EraseCursor(void)
 
    unsigned char *src = MouseBuffer;
 
+   if(!MouseVisible || CurrentCursor < 0 || CurrentCursor >= NUM_CURSORS)
+      return;
+
    for(i = 0; i<CURSOR_HEIGHT; i++) {
       memcpy(BackBuffer + off, src, stride);
       src += stride;
@@ -110,7 +113,7 @@ void DrawCursor(void)
    unsigned char *c;
    const unsigned char *d;
 
-   if(CurrentCursor < 0 || CurrentCursor >= NUM_CURSORS)
+   if(!MouseVisible || CurrentCursor < 0 || CurrentCursor >= NUM_CURSORS)
       return;
 
    px = MouseX - CursorsXOffset[CurrentCursor];
@@ -212,10 +215,12 @@ void SwapCursor(void)
    int miny = MIN(py, LastMouseY);
    int sizey = abs(py - LastMouseY);
 
-   DrawCursor();
-   /* now update the portion of the screen that has changed */
+   if(MouseVisible)
+      DrawCursor();
 
-   if(DisplayMode & GLUT_DOUBLE && (sizex || sizey)) {
+   /* now update the portion of the screen that has changed, this is also
+      used to hide the mouse if MouseVisible is 0 */
+   if(DisplayMode & GLUT_DOUBLE && ((sizex || sizey) || !MouseVisible)) {
       int off, stride, i;
       if(minx < 0)
 	 minx = 0;
@@ -230,7 +235,7 @@ void SwapCursor(void)
 	 + minx * VarInfo.bits_per_pixel / 8;
       stride = (sizex + CURSOR_WIDTH) * VarInfo.bits_per_pixel / 8;
 
-      for(i = 0; i< sizey + CURSOR_HEIGHT; i++) {
+      for(i = 0; i < sizey + CURSOR_HEIGHT; i++) {
 	 memcpy(FrameBuffer+off, BackBuffer+off, stride);
 	 off += FixedInfo.line_length;
       }
@@ -260,11 +265,8 @@ void glutSetCursor(int cursor)
    if(cursor == GLUT_CURSOR_FULL_CROSSHAIR)
       cursor = GLUT_CURSOR_CROSSHAIR;
 
-   if(CurrentCursor >= 0 && CurrentCursor < NUM_CURSORS)
-      EraseCursor();
-
+   EraseCursor();
+   MouseVisible = 1;
    CurrentCursor = cursor;
-
-   MouseEnabled = 1;
    SwapCursor();
 }
diff --git a/src/glut/fbdev/fbdev.c b/src/glut/fbdev/fbdev.c
index 7b46d54..3b63cd7 100644
--- a/src/glut/fbdev/fbdev.c
+++ b/src/glut/fbdev/fbdev.c
@@ -74,6 +74,7 @@ int Redisplay;
 int Visible;
 int VisibleSwitch;
 int Active;
+static int Resized;
 /* we have to poll to see if we are visible
    on a framebuffer that is not active */
 int VisiblePoll;
@@ -127,8 +128,10 @@ static void Cleanup(void)
 	 fprintf(stderr, "ioctl(FBIOPUT_VSCREENINFO failed): %s\n",
 		 strerror(errno));
 
-      munmap(FrameBuffer, FixedInfo.smem_len);
+      if(FrameBuffer)
+         munmap(FrameBuffer, FixedInfo.smem_len);
       close(FrameBufferFD);
+
    }
 
    /* free allocated back buffer */
@@ -424,6 +427,8 @@ static void ProcessTimers(void)
 
 void glutMainLoop(void)
 {
+   int idleiters;
+
    if(ReshapeFunc)
       ReshapeFunc(VarInfo.xres, VarInfo.yres);
 
@@ -440,8 +445,6 @@ void glutMainLoop(void)
       else
 	 if(VisiblePoll)
 	    TestVisible();
-	 else
-	    usleep(1);
 
       if(IdleFunc)
 	 IdleFunc();
@@ -452,17 +455,48 @@ void glutMainLoop(void)
 	    VisibilityFunc(Visible ? GLUT_VISIBLE : GLUT_NOT_VISIBLE);
       }
 
+      if(Resized) {
+         SetVideoMode();
+         CreateBuffer();
+
+         if(!glFBDevMakeCurrent( Context, Buffer, Buffer )) {
+            sprintf(exiterror, "Failure to Make Current\n");
+            exit(0);
+         }
+
+         InitializeMenus();
+
+         if(ReshapeFunc)
+            ReshapeFunc(VarInfo.xres, VarInfo.yres);
+
+         Redisplay = 1;
+         Resized = 0;
+      }
+
       if(Visible && Redisplay) {
 	 Redisplay = 0;
-	 if(MouseEnabled)
-	    EraseCursor();
+         EraseCursor();
 	 DisplayFunc();
 	 if(!(DisplayMode & GLUT_DOUBLE)) {
 	    if(ActiveMenu)
 	       DrawMenus();
-	    if(MouseEnabled)
-	       DrawCursor();
+            DrawCursor();
 	 }
+         idleiters = 0;
+      } else {
+         /* we sleep if not receiving redisplays, and
+            the main loop is running faster than 2khz */
+
+         static int lasttime;
+         int time = glutGet(GLUT_ELAPSED_TIME);
+         if(time > lasttime) {
+            if(idleiters >= 2)
+               usleep(100);
+
+            idleiters = 0;
+            lasttime = time;
+         }
+         idleiters++;         
       }
    }
 }
@@ -536,17 +570,16 @@ int ParseFBModes(int minw, int maxw, int minh, int maxh, int minf, int maxf)
    return 0;
 }
 
-/* ---------- Window Management ----------*/
 void SetVideoMode(void)
 {
    /* set new variable screen info */
    if (ioctl(FrameBufferFD, FBIOPUT_VSCREENINFO, &VarInfo)) {
-      sprintf(exiterror, "ioctl(FBIOPUT_VSCREENINFO failed): %s\n",
-	      strerror(errno));
+      sprintf(exiterror, "FBIOPUT_VSCREENINFO failed: %s\n", strerror(errno));
+      strcat(exiterror, "Perhaps the device does not support the selected mode\n");
       exit(0);
    }
 
-   /* reload the screen info to update offsets */
+   /* reload the screen info to update rgb bits */
    if (ioctl(FrameBufferFD, FBIOGET_VSCREENINFO, &VarInfo)) {
       sprintf(exiterror, "error: ioctl(FBIOGET_VSCREENINFO) failed: %s\n",
 	      strerror(errno));
@@ -571,11 +604,10 @@ void SetVideoMode(void)
    }
 
    /* initialize colormap */
-   if(FixedInfo.visual != FB_VISUAL_TRUECOLOR)
-      LoadColorMap();
+   LoadColorMap();
 }
 
-void CreateBuffer()
+void CreateBuffer(void)
 {
    int size = VarInfo.xres_virtual * VarInfo.yres_virtual
                               * VarInfo.bits_per_pixel / 8;
@@ -674,20 +706,6 @@ void CreateVisual(void)
    }
 }
 
-static void ResizeVisual(void)
-{ 
-   if(!glFBDevMakeCurrent( Context, Buffer, Buffer )) {
-      sprintf(exiterror, "Failure to Make Current\n");
-      exit(0);
-   }
-
-   InitializeMenus();
-
-   if(ReshapeFunc)
-      ReshapeFunc(VarInfo.xres, VarInfo.yres);
-   Redisplay = 1;
-}
-
 static void SignalWinch(int arg)
 {
    /* we can't change bitdepth without destroying the visual */
@@ -709,10 +727,7 @@ static void SignalWinch(int arg)
    VarInfo.blue = blue;
    VarInfo.transp = transp;
 
-   SetVideoMode();
-   CreateBuffer();
-
-   ResizeVisual();
+   Resized = 1;
 }
 
 int glutCreateWindow (const char *title)
@@ -805,12 +820,14 @@ void glutSwapBuffers(void)
 {
    glFlush();
 
+   if(!(DisplayMode & GLUT_DOUBLE))
+      return;
+
    if(ActiveMenu)
       DrawMenus();
-   if(MouseEnabled)
-      DrawCursor();
+   DrawCursor();
 
-   if(DisplayMode & GLUT_DOUBLE && Visible) {
+   if(Visible) {
       Swapping = 1;
       glFBDevSwapBuffers(Buffer);
       Swapping = 0;
@@ -839,10 +856,8 @@ void glutReshapeWindow(int width, int height)
    signal(SIGWINCH, SIG_IGN);
 
    SetVideoMode();
-   CreateBuffer();
-
-   ResizeVisual();
    signal(SIGWINCH, SignalWinch);
+   Resized = 1;
 }
 
 void glutFullScreen(void)
diff --git a/src/glut/fbdev/input.c b/src/glut/fbdev/input.c
index d09de22..044aa50 100644
--- a/src/glut/fbdev/input.c
+++ b/src/glut/fbdev/input.c
@@ -65,8 +65,8 @@ double MouseSpeed = 0;
 
 int KeyRepeatMode = GLUT_KEY_REPEAT_DEFAULT;
 
-/* only display the mouse if there is a registered callback for it */
-int MouseEnabled = 0;
+int MouseVisible = 0;
+int LastMouseTime = 0;
 
 static int OldKDMode = -1;
 static int OldMode = KD_TEXT;
@@ -79,6 +79,8 @@ static int MouseFD;
 
 static int kbdpipe[2];
 
+static int LastStdinKeyTime, LastStdinSpecialKey = -1, LastStdinCode = -1;
+
 #define MODIFIER(mod) \
     KeyboardModifiers = release ? KeyboardModifiers & ~mod   \
                                 : KeyboardModifiers | mod;
@@ -93,7 +95,6 @@ static void KeyboardHandler(int sig)
    unsigned char code;
 
    while(read(ConsoleFD, &code, 1) == 1) {
-
       int release, labelval;
       struct kbentry entry;
       static int lalt; /* only left alt does vt switch */
@@ -163,10 +164,47 @@ static void LedModifier(int led, int release)
 	 KeyboardLedState ^= led;
 	 releaseflag &= ~led;
       }
+
    ioctl(ConsoleFD, KDSKBLED, KeyboardLedState);
    ioctl(ConsoleFD, KDSETLED, 0x80);
 }
 
+static void HandleKeyPress(unsigned char key, int up)
+{
+   if(up) {
+      if(KeyboardUpFunc)
+         KeyboardUpFunc(key, MouseX, MouseY);
+   } else
+      if(KeyboardFunc)
+         KeyboardFunc(key, MouseX, MouseY);
+
+   /* there was no keyboard handler to provide a way to exit the program */
+   if(key == 27)
+      exit(0); 
+}
+
+static void HandleSpecialPress(int key, int up)
+{
+   if(up) {
+      if(SpecialUpFunc)
+         SpecialUpFunc(key, MouseX, MouseY);
+   } else
+      if(SpecialFunc)
+         SpecialFunc(key, MouseX, MouseY);
+}
+
+static void ReleaseStdinKey(void)
+{
+   if(LastStdinSpecialKey != -1) {
+      HandleSpecialPress(LastStdinSpecialKey, 1);
+      LastStdinSpecialKey = -1;
+   }
+   if(LastStdinCode != -1) {
+      HandleKeyPress(LastStdinCode, 1);
+      LastStdinCode = -1;
+   }
+}
+
 #define READKEY read(kbdpipe[0], &code, 1)
 static int ReadKey(void)
 {
@@ -175,8 +213,14 @@ static int ReadKey(void)
    int specialkey = 0;
    struct kbentry entry; 
 
-   if(READKEY != 1)
+   if(READKEY != 1) {
+      /* if we are reading from stdin, we detect key releases when the key
+         does not repeat after a given timeout */
+      if(ConsoleFD == 0 && LastStdinKeyTime + 100 < glutGet(GLUT_ELAPSED_TIME))
+         ReleaseStdinKey();
       return 0;
+   }
+
    if(code == 0)
       return 0;
 
@@ -185,65 +229,82 @@ static int ReadKey(void)
       KeyboardModifiers = 0;
    altset:
       if(code == 27 && READKEY == 1) {
-	 switch(code) {
-	 case 79: /* function key */
-	    READKEY;
-	    if(code == 50) {
-	       READKEY;
-	    shiftfunc:
-	       KeyboardModifiers |= GLUT_ACTIVE_SHIFT;
-	       specialkey = GLUT_KEY_F1 + code - 53;
-	       READKEY;
-	    } else {
-	       READKEY;
-	       specialkey = GLUT_KEY_F1 + code - 80;		    
-	    }
-	    break;
-	 case 91:
-	    READKEY;
-	    switch(code) {
-	    case 68:
-	       specialkey = GLUT_KEY_LEFT; break;
-	    case 65:
-	       specialkey = GLUT_KEY_UP; break;
-	    case 67:
-	       specialkey = GLUT_KEY_RIGHT; break;
-	    case 66:
-	       specialkey = GLUT_KEY_DOWN; break;
-	    case 53:
-	       specialkey = GLUT_KEY_PAGE_UP; READKEY; break;
-	    case 54:
-	       specialkey = GLUT_KEY_PAGE_DOWN; READKEY; break;
-	    case 49:
-	       specialkey = GLUT_KEY_HOME; READKEY; break;
-	    case 52:
-	       specialkey = GLUT_KEY_END; READKEY; break;
-	    case 50:
-	       READKEY;
-	       if(code != 126)
-		  goto shiftfunc;
-	       specialkey = GLUT_KEY_INSERT;
-	       break; 
-	    case 51:
-	       code = '\b';
-	       goto stdkey;
-	    case 91:
-	       READKEY;
-	       specialkey = GLUT_KEY_F1 + code - 65;
-	       break;
-	    default:
-	       return 0;
-	    }
-	    break;
-	 default:
+         if(code != 91) {
 	    KeyboardModifiers |= GLUT_ACTIVE_ALT;
 	    goto altset;
 	 }
+         READKEY;
+         switch(code) {
+         case 68:
+            specialkey = GLUT_KEY_LEFT; break;
+         case 65:
+            specialkey = GLUT_KEY_UP; break;
+         case 67:
+            specialkey = GLUT_KEY_RIGHT; break;
+         case 66:
+            specialkey = GLUT_KEY_DOWN; break;
+         case 52:
+            specialkey = GLUT_KEY_END; READKEY; break;
+         case 53:
+            specialkey = GLUT_KEY_PAGE_UP; READKEY; break;
+         case 54:
+            specialkey = GLUT_KEY_PAGE_DOWN; READKEY; break;
+         case 49:
+            READKEY;
+            if(code == 126)
+               specialkey = GLUT_KEY_HOME;
+            else {
+               specialkey = GLUT_KEY_F1 + code - 50;
+               READKEY;
+            }
+            break;
+         case 50:
+            READKEY;
+            if(code == 126)
+               specialkey = GLUT_KEY_INSERT;
+            else {
+               if(code > '1')
+                  code--;
+               if(code > '6')
+                  code--;
+               if(code > '3') {
+                  KeyboardModifiers |= GLUT_ACTIVE_SHIFT;
+                  code -= 12;
+               }
+               specialkey = GLUT_KEY_F1 + code - 40;
+               READKEY;
+            }
+            break; 
+         case 51:
+            READKEY;
+            if(code == 126) {
+               code = '\b';
+               goto stdkey;
+            }
+            KeyboardModifiers |= GLUT_ACTIVE_SHIFT;
+            specialkey = GLUT_KEY_F1 + code - 45;
+            READKEY;
+            break;
+         case 91:
+            READKEY;
+            specialkey = GLUT_KEY_F1 + code - 65;
+            break;
+         default:
+            return 0;
+	 }
       }
 
       if(specialkey) {
-	 if(SpecialFunc)
-	    SpecialFunc(specialkey, MouseX, MouseY);
+         LastStdinKeyTime = glutGet(GLUT_ELAPSED_TIME);
+
+         if(LastStdinSpecialKey != specialkey) {
+            ReleaseStdinKey();
+            HandleSpecialPress(specialkey, 0);
+            LastStdinSpecialKey = specialkey;
+            LastStdinKeyTime += 200; /* initial repeat */
+         } else
+         if(KeyRepeatMode != GLUT_KEY_REPEAT_OFF)
+            HandleSpecialPress(specialkey, 0);
       } else {
 	 if(code >= 1 && code <= 26 && code != '\r') {
 	    KeyboardModifiers |= GLUT_ACTIVE_CTRL;
@@ -255,8 +316,15 @@ static int ReadKey(void)
 	    KeyboardModifiers |= GLUT_ACTIVE_SHIFT;
 
       stdkey:
-	 if(KeyboardFunc)
-	    KeyboardFunc(code, MouseX, MouseY);
+         LastStdinKeyTime = glutGet(GLUT_ELAPSED_TIME);
+         if(LastStdinCode != code) {
+            ReleaseStdinKey();
+            HandleKeyPress(code, 0);
+            LastStdinCode = code;
+            LastStdinKeyTime += 200; /* initial repeat */
+         } else
+         if(KeyRepeatMode != GLUT_KEY_REPEAT_OFF)
+            HandleSpecialPress(code, 0);
       }
       return 1;
    }
@@ -348,12 +416,7 @@ static int ReadKey(void)
 
    /* dispatch callback */
    if(specialkey) {
-      if(release) {
-	 if(SpecialUpFunc)
-	    SpecialUpFunc(specialkey, MouseX, MouseY);
-      } else
-	 if(SpecialFunc)
-	    SpecialFunc(specialkey, MouseX, MouseY);
+      HandleSpecialPress(specialkey, release);
    } else {
       char c = labelval;
 
@@ -364,12 +427,7 @@ static int ReadKey(void)
 	    if(c >= 'a' && c <= 'z')
 	       c += 'A' - 'a';
       }
-      if(release) {
-	 if(KeyboardUpFunc)
-	    KeyboardUpFunc(c, MouseX, MouseY);
-      } else
-	 if(KeyboardFunc)
-	    KeyboardFunc(c, MouseX, MouseY);
+      HandleKeyPress(c, release);
    }
    return 1;
 }
@@ -432,28 +490,22 @@ static int ReadMouse(void)
       dy = event.dy;
    } else
 #endif
-      {
-	 char data[4];
-
-	 if(MouseFD == -1)
-	    return 0;
+   {
+      char data[4];
 
-	 if(fcntl(MouseFD, F_SETFL, O_NONBLOCK) == -1) {
-	    close(MouseFD);
-	    MouseFD = -1;
-	    return 0;
-	 }
+      if(MouseFD == -1)
+         return 0;
 
-	 if(read(MouseFD, data, 4) != 4)
-	    return 0;
+      if(read(MouseFD, data, 4) != 4)
+         return 0;
 	
-	 l = ((data[0] & 0x20) >> 3);
-	 m = ((data[3] & 0x10) >> 3);
-	 r = ((data[0] & 0x10) >> 4);
+      l = ((data[0] & 0x20) >> 3);
+      m = ((data[3] & 0x10) >> 3);
+      r = ((data[0] & 0x10) >> 4);
 
-	 dx = (((data[0] & 0x03) << 6) | (data[1] & 0x3F));
-	 dy = (((data[0] & 0x0C) << 4) | (data[2] & 0x3F));
-      }
+      dx = (((data[0] & 0x03) << 6) | (data[1] & 0x3F));
+      dy = (((data[0] & 0x0C) << 4) | (data[2] & 0x3F));
+   }
 
    MouseX += dx * MouseSpeed;
    if(MouseX < 0)
@@ -478,7 +530,7 @@ static int ReadMouse(void)
 
    ll = l, lm = m, lr = r;
 
-   if(dx || dy) {
+   if(dx || dy || !MouseVisible) {
       if(l || m || r) {
 	 if(MotionFunc)
 	    MotionFunc(MouseX, MouseY);
@@ -488,12 +540,16 @@ static int ReadMouse(void)
 
       EraseCursor();
 
+      MouseVisible = 1;
+
       if(ActiveMenu)
 	 Redisplay = 1;
       else
 	 SwapCursor();
    }
 
+   LastMouseTime = glutGet(GLUT_ELAPSED_TIME);
+
    return 1;
 }
 
@@ -502,8 +558,14 @@ void ReceiveInput(void)
    if(ConsoleFD != -1)
       while(ReadKey());
     
-   if(MouseEnabled)
-      while(ReadMouse());
+   while(ReadMouse());
+
+   /* implement a 2 second timeout on the mouse */
+   if(MouseVisible && glutGet(GLUT_ELAPSED_TIME) - LastMouseTime > 2000) {
+      EraseCursor();
+      MouseVisible = 0;
+      SwapCursor();
+   }
 }
 
 static void VTSwitchHandler(int sig)
@@ -526,11 +588,7 @@ static void VTSwitchHandler(int sig)
       if(st.v_active)
 	 ioctl(ConsoleFD, VT_RELDISP, VT_ACKACQ);
 
-      /* this is a hack to turn the cursor off */
-      ioctl(FrameBufferFD, FBIOPUT_VSCREENINFO, &VarInfo);
-
-      if(FixedInfo.visual != FB_VISUAL_TRUECOLOR)
-         RestoreColorMap();
+      RestoreColorMap();
 
       Active = 1;
       Visible = 1;
@@ -570,11 +628,6 @@ void InitializeVT(int usestdin)
       exit(0);
    }
 
-   if(fcntl(0, F_SETFL, O_NONBLOCK | O_ASYNC) < 0) {
-      sprintf(exiterror, "Failed to set keyboard to non-blocking\n");
-      exit(0);
-   }
-
    Active = 1;
 
    if(usestdin) {
@@ -582,6 +635,12 @@ void InitializeVT(int usestdin)
       return;
    }
 
+   /* enable sigio for input */
+   if(fcntl(0, F_SETFL, O_ASYNC) < 0) {
+      sprintf(exiterror, "Failed to set O_ASYNC mode on fd 0\n");
+      exit(0);
+   }
+
    /* detect the current vt if it was not specified */
    if(CurrentVT == 0) {
       int fd = open("/dev/tty", O_RDWR | O_NDELAY, 0);
@@ -590,15 +649,16 @@ void InitializeVT(int usestdin)
 	 sprintf(exiterror, "Failed to open /dev/tty\n");
 	 exit(0);
       }
+
       if(ioctl(fd, VT_GETSTATE, &st) == -1) {
 	 fprintf(stderr, "Could not detect current vt, specify with -vt\n");
 	 fprintf(stderr, "Defaulting to stdin input\n");
 	 ConsoleFD = 0;
 	 close(fd);
 	 return;
-      } else
-	 CurrentVT =  st.v_active;
+      }
 
+      CurrentVT =  st.v_active;
       close(fd);
    }
     
@@ -686,10 +746,10 @@ void RestoreVT(void)
    if (tcsetattr(0, TCSANOW, &OldTermios) < 0)
       fprintf(stderr, "tcsetattr failed\n");
 
-   /* setting the mode to text from graphics restores the colormap*/
+   /* setting the mode to text from graphics restores the colormap */
    if(
 #ifdef HAVE_GPM
-   GpmMouse ||
+   !GpmMouse ||
 #endif
    ConsoleFD == 0)
       if(ioctl(ConsoleFD, KDSETMODE, KD_GRAPHICS) < 0)
@@ -725,11 +785,11 @@ void InitializeMouse(void)
       const char *mousedev = getenv("MOUSE");
       if(!mousedev)
 	 mousedev = MOUSEDEV;
-      if((MouseFD = open(mousedev, O_RDONLY)) >= 0) {
-	 if(!MouseSpeed)
-	    MouseSpeed = 1;
-	 NumMouseButtons = 3;
-	 return;
+      if((MouseFD = open(mousedev, O_RDONLY | O_NONBLOCK)) >= 0) {
+         if(!MouseSpeed)
+            MouseSpeed = 1;
+         NumMouseButtons = 3;
+         return;
       }
    }
 #ifdef HAVE_GPM
diff --git a/src/glut/fbdev/internal.h b/src/glut/fbdev/internal.h
index 8801cc9..0a159d9 100644
--- a/src/glut/fbdev/internal.h
+++ b/src/glut/fbdev/internal.h
@@ -51,6 +51,8 @@ extern int Swapping, VTSwitch;
 
 void TestVisible(void);
 int ParseFBModes(int, int, int, int, int, int);
+void SetVideoMode(void);
+void CreateBuffer(void);
 void CreateVisual(void);
 
 extern int FrameBufferFD;
@@ -84,7 +86,8 @@ void RestoreColorMap(void);
 /* --- mouse --- */
 extern int MouseX, MouseY;
 extern int CurrentCursor;
-extern int MouseEnabled;
+extern int MouseVisible;
+extern int LastMouseTime;
 extern int NumMouseButtons;
 
 void InitializeCursor(void);
diff --git a/src/glut/fbdev/menu.c b/src/glut/fbdev/menu.c
index 18cd58d..4ab4eb3 100644
--- a/src/glut/fbdev/menu.c
+++ b/src/glut/fbdev/menu.c
@@ -71,6 +71,7 @@ void FreeMenus(void)
 	 free(Menus[i].Items[j].name);
       free(Menus[i].Items);
    }
+   
    free(Menus);
 }
 
@@ -206,7 +207,6 @@ void CloseMenu(void)
 
 int glutCreateMenu(void (*func)(int value))
 {
-   MouseEnabled = 1;
    CurrentMenu = NumMenus;
    NumMenus++;
    Menus = realloc(Menus, sizeof(*Menus) * NumMenus);
diff --git a/src/glut/fbdev/overlay.c b/src/glut/fbdev/overlay.c
index 8bd2071..374cf30 100644
--- a/src/glut/fbdev/overlay.c
+++ b/src/glut/fbdev/overlay.c
@@ -24,6 +24,7 @@
  * Written by Sean D'Epagnier (c) 2006
  */
 
+#include <stdlib.h>
 #include <GL/gl.h>
 
 void glutEstablishOverlay(void)