Spooky... If you have a german keyboard, then it's really the ^ key (above tab). Alternatively, you can try ö or ü.
I can't tell you why steam screenshot function did not work, but the config key has no influence on it. Currently the key from the config is not used at all, and even before, when the defaultkey was indeed F12, people hat the problem that they took screenshots when opening the console (that's the reason why we changed the default key) ![]()
Unfortunately the console is the only way to enter commands... I don't know if it has something to do with Linux. What about other Linux users, has anybody these problems too?