ofboot.b: fix random boot failure bug, restore console output so yaboot is visible.

yaboot.conf: bump delay to 10 seconds, some machines take awhile for
the video to warm up.  Add `debian-novideo' option which appends
video=ofonly for machines lacking proper framebuffer support in the
kernel.

data/yaboot/ofboot.b

@@ -6,6 +6,8 @@ MacRISC
 Debian GNU/Linux 2.2 (potato) PowerPC bootloader
 </DESCRIPTION>
 <BOOT-SCRIPT>
-boot cd:2,\install\powermac\yaboot
+" screen" output
+load-base release-load-area
+boot cd:,\install\powermac\yaboot
 </BOOT-SCRIPT>
 </CHRP-BOOT>

data/yaboot/yaboot.conf

@@ -5,14 +5,22 @@ init-message="Debian GNU/Linux PowerPC (CODENAME)"
 
 # It is important not to have a comma after cd:
 device=cd:
-timeout=50
+partition=2
+timeout=100
 
 # \ is an escape character.
 # If you need to enter a path at the boot: prompt, do not
 # double the backslashes.
 image=\\install\\powermac\\vmlinux
-        label=debian
-	partition=2
+	label=debian
 	initrd=\\install\\powermac\\root.bin
 	initrd-size=8192
-        read-only
+	read-only
+
+# some machines have wonky framebuffer support
+image=\\install\\powermac\\vmlinux
+	label=debian-novideo
+	initrd=\\install\\powermac\\root.bin
+	initrd-size=8192
+	append="video=ofonly"
+	read-only