I had similar problems on Utopic (14.10), but not anymore on Vivid (15.04). The same problem occurred to me with all other system-wide shortcuts as well, e.g. volume up/down, keyboard layout switch etc. I heard other people confirming it. Is it maybe the same for you?
I had similar problems on Utopic (14.10), but not anymore on Vivid (15.04). The same problem occurred to me with all other system-wide shortcuts as well, e.g. volume up/down, keyboard layout switch etc. I heard other people confirming it. Is it maybe the same for you?