VideoProjector

Our new 16/9 video beamer (Aacer P7500) has some 16/9 issues as we only use a VGA (loooong) cable. So thet 16/9 laptop connected to the 16/9 projector switches to 4/3 as there seems to be no DCC signal coming through. That result in a nice 4/3 image on the 16/9 projector... pfuuuh

So here comes the xrandr,as seen on 29C3 Note that not all this will work on your laptop (e.g. the name of the display)

 # my laptop is 1366x768, so that what I use
 #xrandr       # gives the names of the displays you have
 #gtf 1366 768 60    # this gives the parameters for the next line 
 xrandr --newmode "1368x768_60.00"  85.86  1368 1440 1584 1800  768 769 772 795  -HSync +Vsync
 xrandr --addmode VGA1 1368x768_60.00
 xrandr --output VGA1 --mode 1368x768_60.00
 # mirror mode
 xrandr --output VGA1 --same-as LVDS1
 xrandr --output LVDS1 --mode 1366x768

Another setup with the recent arrival of an old acer aspire 5570Z laptop. This time side by side.

  # gtf 1920 1080 60
  xrandr --newmode "1920x1080_60.00"  172.80  1920 2040 2248 2576  1080 1081 1084 1118  -HSync +Vsync
  xrandr --addmode VGA1 1920x1080_60.00
  xrandr --output VGA1 1920x1080_60.00
  xrandr --output VGA1 --mode 1920x1080_60.00
  xrandr --output VGA1 --right-of LVDS1

  vlc --fullscreen --disable-screensaver --no-video-title-show --mouse-hide-timeout 100