xrandr once configured, it resets after new reboot, keep restarting INVERTED

There is an HP notebook Pavillion DV6 4gb ram, 15 inch monitor single, HDMI and VGA connections, processor AMD A6. Successfully installed this Ubuntu 19 release. But, after a reset, it keep running monitor display 180 degrees rotated. Then , I use xrandr with NORMAL option, and it works only in my session: xrandr –output LDVS –rotate normal After a reboot, in a new session, the monitor appears INVERTED again. By the other hand, after adjusting monitor screen intensity with keypad buttons, after a reboot the screen appears with TOTAL light adjustment, again. How can I permanently set my config options.? Thanks in advance.