I have found out where the problem was. Problem is in my RAM memory, i have tested it with memtest and discovered errors. Now I'm running ubuntu with the same kernel and there is no problem, no error messages and no sudo problem any more. I'm sorry for reporting bug that doesn't exist.
-- Kernel error message https://launchpad.net/bugs/76819 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
