Recently I tried to remove acer-wmi module (sudo modprobe -r acer-wmi) and so far typing on konsole has no more lags at all and seems the system is quiet stable. So, seems this is what causing the system LAGs/Freezes.
-- Konsole LAG/Freezes when Typing - Kubuntu Karmic https://bugs.launchpad.net/bugs/443318 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