I can confirm the behavior mdo is experiencing. Super-L only seems to work for Lock Screen per session after you set it in the Hotkeys configuration. After a restart of the machine you have to reset the hotkey to Super+L again for it to work (and it will only work until you restart again).
I have also experienced the same exact behavior with Super+C, which I had set for Calculator.
I can confirm the behavior mdo is experiencing. Super-L only seems to work for Lock Screen per session after you set it in the Hotkeys configuration. After a restart of the machine you have to reset the hotkey to Super+L again for it to work (and it will only work until you restart again).
I have also experienced the same exact behavior with Super+C, which I had set for Calculator.
- Using Ubuntu 13.10 (Saucy).