After I changed my power supply, mainboard and RAMs the problem has been solved. So, it is either related with power supply, mainboard or RAMs, I don't know which one.
-- Shutdown does not turn off my computer completely https://bugs.launchpad.net/bugs/66994 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