Laptop screen blank when using second monitor

[Oliver Ruebenacker]

     Hello,

  Until this morning, my Lenovo Thinkpad T430 running KDE on Fedora 19 was
working fine sitting on a base with a second monitor attached. I removed it
from the base and connected another second monitor (a projector) and things
were still fine. When I put it back into the base, the laptop screen went
blank, and it was using only the second screen. When I remove it from the
base, it uses the built-in screen, but as soon as I put it into the base,
it only uses the second screen. Interestingly, when I restart, it uses both
screens properly until after I log in.

  Any advice? Thanks!

     Best,
     Oliver

-- 
Oliver Ruebenacker
IT Project Lead at PanGenX (http://www.pangenx.com)
Be always grateful, but never satisfied.
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