So if you ask xrandr you can find out what's connected where and it's resolution and physical dimensions
So with an external monitor connected to my laptop xrandr gives the following output: [EMAIL PROTECTED]:~$ xrandr Screen 0: minimum 320 x 200, current 1280 x 1792, maximum 2048 x 2048 VGA connected 1280x1024+0+0 (normal left inverted right) 376mm x 301mm 1280x1024 60.0*+ 75.0 59.9 1280x960 59.9 1152x864 75.0 74.8 1024x768 75.1 70.1 60.0 832x624 74.6 800x600 72.2 75.0 60.3 56.2 640x480 75.0 72.8 66.7 60.0 720x400 70.1 LVDS connected 1024x768+0+1024 (normal left inverted right) 304mm x 228mm 1024x768 60.0*+ 800x600 60.3 640x480 59.9 TV disconnected (normal left inverted right) [EMAIL PROTECTED]:~$ So of the 3 outputs on my display 2 are connected the physical dimensons of each are correctly reported but when I fire up ogle it gets the following Note[ogle_vout]: Using 'X11' as source for geometry Note[ogle_vout]: Using 'Xinerama' as source for resolution Note[ogle_vout]: Display w: 401, h: 601, hp: 1024, vp: 768 Note[ogle_vout]: Display sar: 615424/307968 = 1.998337 Note[ogle_vout]: Found 8 matching visuals, using visual id:23 so while maximising windows works correctly to a single screen the video aspect is displayed incorrectly -- GRANT DIFFEY SUN PROACTIVE TECHNICAL ENGINEER FRONTLINE SYSTEMS AUSTRALIA 20 BUSINESS PARK DRIVE NOTTING HILL VIC 3168 T. 03 8710 0381 F. 03 9793 3813 M. 0424 908 336 www.frontline.com.au <http://www.frontline.com.au> CONFIDENTIALITY This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. The content and opinions contained in this email are not able to be copied or sent to any other recipient without the author's permission. If you have received this email in error please contact the sender.