Cannot add new mode in xrandr for external monitor

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http://unix.stackexchange.com – Today I was trying to connect my second monitor to my notebook. I have: nvidia graphic card 304.43 drivers [support xrandr 1.2] archlinux [up-to-date] awesome wm xrandr 1.3 My problem is with bigger resolution than 640x480 for my external monitor (VGA). xrandr -q: Screen 0: minimum 8 x 8, current 1920 x 800, maximum 8192 x 8192 VGA-0 connected 640x480+1280+0 (normal left inverted right x axis y axis) 0mm 640x480 59.9*+ 320x240 120.1 LVDS-0 connected 1280x800+0+0 (normal left inverted right x axis y axis) 331m 1280x800 59.9*+ HDMI-0 disconnected (normal left i (HowTos)