How to change screen resolution in Debian distribution?

Question

Debian

There is an ATI card. There is Jessie. There is no 1920x1080 in xrandr and it doesn't detect a monitor, the screen resolution is currently 1280x720 on the system even though the screen is fullhd. Installed firmware-linux-nonfree libgl1-mesa-dri xserver-xorg-video-ati and then installed linux-headers-$(uname -r|sed 's,[^-]*-[^-]*-,,' ) fglrx-driver. Nothing changed.
lspci-nn | grep VGA does not detect the card. How to make high resolution?
I am using Virtual Box.

Answer 1

Remove the physical video card driver, it is useless in VB.
Install Guest Additions (when installing, make sure everything went as it should).
After that, xrandr should show the normal choice of permissions.

Answer 2

Firstly, virtual box uses vidyuha emulation, that is, if an atish vidyuha is on the host, this will not help much in finding it in the virtual machine, and secondly, the resolution and all the perks are set if the system does not define them in the /etc/X11/xorg.conf file

Answer 3

Guest Additions should help.