Index: firmware/screendump.c
===================================================================
--- firmware/screendump.c	(revision 31161)
+++ firmware/screendump.c	(working copy)
@@ -112,11 +112,9 @@
     unsigned val;
 #endif
 #if LCD_DEPTH <= 8
-    unsigned char *dst, *dst_end;
-    unsigned char linebuf[DUMP_BMP_LINESIZE];
+    unsigned char *dst, *dst_end, *linebuf;
 #elif LCD_DEPTH <= 16
-    unsigned short *dst, *dst_end;
-    unsigned short linebuf[DUMP_BMP_LINESIZE/2];
+    unsigned short *dst, *dst_end, *linebuf;
 #endif
 
 #if CONFIG_RTC
@@ -130,6 +128,9 @@
     if (fd < 0)
         return;
 
+    /* Allocate linebuf now, because creat() needed a lot of stack space */
+    linebuf = __builtin_alloca(DUMP_BMP_LINESIZE);
+
     if (screen_dump_hook)
     {
         screen_dump_hook(fd);