some extension in Chrome may cause X server out of free client slots (for example http://www.ngohaibac.com/how-to-solve-maximum-number-of-clients-reached-gtk-warning-cannot-open-display-in-ubuntu-9-10-64-bit/ ) Closing Chrome did the trick in my case.
some extension in Chrome may cause X server out of free client slots (for example http:// www.ngohaibac. com/how- to-solve- maximum- number- of-clients- reached- gtk-warning- cannot- open-display- in-ubuntu- 9-10-64- bit/ )
Closing Chrome did the trick in my case.