Package: x11-xserver-utils Version: 7.7+7+b1 File: /usr/bin/xrandr xrandr lists modes that it then cannot find. $ xrandr|perl -anwle 'for($F[0]){print if /x/;}'|xargs -n 1 xrandr --dryrun --output LVDS-1 --mode crtc 0: 1366x768 59.99 +0+0 "LVDS-1" crtc 0: disable screen 0: 1360x768 359x203 mm 96.09dpi crtc 0: 1360x768 59.80 +0+0 "LVDS-1" crtc 0: disable screen 0: 1024x768 270x203 mm 96.09dpi crtc 0: 1024x768 60.00 +0+0 "LVDS-1" xrandr: cannot find mode 960x720 xrandr: cannot find mode 928x696 xrandr: cannot find mode 896x672 xrandr: cannot find mode 960x600 xrandr: cannot find mode 960x540 crtc 0: disable screen 0: 800x600 211x158 mm 96.09dpi crtc 0: 800x600 60.32 +0+0 "LVDS-1" xrandr: cannot find mode 840x525 xrandr: cannot find mode 800x512 xrandr: cannot find mode 700x525 xrandr: cannot find mode 640x512 xrandr: cannot find mode 720x450 crtc 0: disable screen 0: 640x480 169x126 mm 96.09dpi crtc 0: 640x480 59.94 +0+0 "LVDS-1" xrandr: cannot find mode 680x384 xrandr: cannot find mode 576x432 xrandr: cannot find mode 512x384 xrandr: cannot find mode 400x300 xrandr: cannot find mode 320x240