For people who use their notebooks generally as desktop PCs, they may
also try to set the "Do nothing on closing lid" option on the BIOS
setup. Then turn off the notebook monitor manually using the above
suggestion... but this is a cumbersome workaround solution.
--
[Regression] No "do nothing"
I've just installed 9.10. This option existed in 9.04... It's very
inconvenient since I also use a notebook with external monitor.
Now I'm using a workaround solution - "System">"Preference ">"Display"> uncheck
"Mirror Display" > Turn off the notebook monitor and leave external monitor
turned
