I have set my "Brightness and Lock" settings such that it will lock the screen after "Screen turns off". Then in my "power" settings, I have the "lid closed" action to "Do Nothing", which turns the screen off when the lid is closed.
In previous versions of Ubuntu (such as 11.04, not sure about 11.10), there was an option to "Blank screen" instead of "Do Nothing", but despite the wording change, they appear to do the same thing (turn the screen off), but with one crucial difference - 12.04 doesn't lock the screen when the lid is closed. It seems to wait for that 30 minute time out I specified in "Brightness and Lock", despite the wording in the "Lock" section claiming that it will lock when the screen turns off.
As I've ticked a box to lock my encrypted-home laptop when the screen turns off, and as the screen turns off when I close the lid, I expect the lock to engage. Since it doesn't, I believe this is a security risk.
1) Release : 12.04, clean insall
2) gnome-control-center : 1:3.3.91-0ubuntu4
3) As the screen turns off when the lid is closed, I expect the lock to engage so that I'm prompted for my password when opening the lid again.
4) No lock engages and when I open the lid, instead I'm returned to my unlocked desktop.
I've confirmed this bug on two laptops - a Toshiba Portege (R700-185) and a Samsung Chronos 7 (NP700Z5A-S01UK). If it's at all relevant, both laptops were built with encrypted home directories.
Thank you for your bug report, that seems similar to https:/