no, that isn't my first language, but that's my common problem that even with my big attempt to talk clear, but that is always disappointing attempt,
anyway thanks for this 1001th time of pointing to this problem by you
so, I try again to be clearer than before,
yes that's exactly problem that I have(number 1,2 that you countered), and when I logging in again in graphical mode , that was again this messagee : can't authenticate..
and when I restarted , linux booting in last seconds to completing stopped and these messages appeare:
ACPI: EC:missing comfirmations, switch off interrupt mode.
ACPI Exception (evregion-0419): AE_TIME, Returned by Handler for [EmbeddedControl] 
ACPI Error (psparse-0530): Method parse/execution failed [\_SB_.BAT0._BST] (Node f78150f0), AE_TIME
ACPI Exception (battery-0360): AE_TIME, Evaluating _BST 
and when I swith to tty6 and logging in successfully , I read the syslogs but there wasn't anything in it