Even I have the same problem. The standby option seems to be inactive and I don't find any other way to put my laptop in standby mode.
A new problem apart from this that I have been noticing since past couple of weeks is when we go through this path (my computer->tools->folder option->view) and select the option "show hidden files and folders" then it automatically changes the option to "Do not show hidden files and folders". It means if we hide a folder, it is difficult to unhide it.
If you have any solution to any of these problems, please reply.