script for trying new modes, and some useful new modes in xorg

fbdev-xorg.conf

@@ -0,0 +1,13 @@
+Section "Device"
+    Identifier "FBDEV"
+    Driver "fbdev"
+    Option "fbdev" "/dev/fb0"
+#    Option "ShadowFB" "false"
+EndSection
+
+Section "ServerFlags"
+    Option "BlankTime" "0"
+    Option "StandbyTime" "0"
+    Option "SuspendTime" "0"
+    Option "OffTime" "0"
+EndSection

try-gtf-xrandr.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+set -eo pipefail
+
+display=LVDS-1
+modeline=($(gtf "$@" | grep Modeline | sed 's/"//g'))
+mode=${modeline[1]}
+
+set -x
+
+xrandr --newmode ${modeline[@]:1}
+if ! xrandr --addmode $display $mode ; then
+	exec xrandr --rmmode $mode
+fi
+if ! xrandr --output $display --mode $mode ; then
+	xrandr --delmode $display $mode
+	exec xrandr --rmmode $mode
+fi
+
+gtf "$@"

xorg.conf

@@ -17,7 +17,19 @@ EndSection
 
 Section "Monitor"
 	Identifier "Monitor0"
+	Option "PreferredMode" "1064x512_60.00"
+	# 1.5x upscaling to native (768p)
+	Modeline "1064x512_60.00"  42.56  1064 1096 1200 1336  512 513 516 531  -HSync +Vsync
+	# whole-number multiple of Gameboy Advance resolution (160p * 3)
 	Modeline "1000x480_60.00"  37.45  1000 1024 1128 1256  480 481 484 497  -HSync +Vsync
+	# whole-number multiple of Super NES resolution (224p * 2)
+	Modeline "936x448_60.00"  32.29  936 952 1048 1160  448 449 452 464  -HSync +Vsync
+	# whole-number multiple of Gameboy Color resolution (144p * 3)
+	Modeline "896x432_60.00"  29.68  896 912 1000 1104  432 433 436 448  -HSync +Vsync
+	# whole-number multiple of Doom and Doom accessories (200p * 2)
+	Modeline "832x400_60.00"  25.10  832 840 920 1008  400 401 404 415  -HSync +Vsync
+	# 2x upscaling to native (768p)
+	Modeline "800x384_60.00"  23.31  800 808 888 976  384 385 388 398  -HSync +Vsync
+	# good for watching 360p youtube
 	Modeline "752x360_60.00"  20.05  752 752 824 896  360 361 364 373  -HSync +Vsync
-	Option "PreferredMode" "1000x480_60.00"
 EndSection