I had a closer look at the problem tonight and shortly what I can say is:
xubuntu does not recognize my built-in monitor right, it likely treats it as a secondary monitor and external vga port - as the primary monitor.
when booted with external monitor, I have picture cloned on both screens, my built-in monitor has the only available resolution of 1024x768 (looks like shifted to the left), but the widescreen external monitor has the right resolution on it
After booting I can unplug the external monitor and the internal monitor will keep working fine (1024x768 ) until reboot
I ave no way to re-detect monitors in monitor settings window
livecd works fine, the problem appears every time I try to boot from hdd
irv, if you know how to file a bug report you are very welcome to do it, I will provide you with any details you need.
PS: Mint 13 (Cinnamon and Xfce editions tested), which is a close derivate of Ubuntu, recognizes my internal monitor just fine. Shame on you, Canonical!
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