Okay, it was the disable keyboard while typing setting which seems to have been enabled by default in karmic. Just a notice: it makes many games totally unplayable which might confuse some users.
** Changed in: xserver-xorg-input-synaptics (Ubuntu) Status: New => Invalid -- Touchpad freezes when pressing a hotkey or keyboard key https://bugs.launchpad.net/bugs/455363 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs