In the archive /etc/default/grub I replaced line: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" with the line: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset" .
When I restarted Ubuntu 13.10 the resolution of the screen decreased very much (about 640 X 480), although the display settings seems to be high.
In the archive /etc/default/grub I replaced line: GRUB_CMDLINE_ LINUX_DEFAULT= "quiet splash" with the line: GRUB_CMDLINE_ LINUX_DEFAULT= "quiet splash nomodeset" .
When I restarted Ubuntu 13.10 the resolution of the screen decreased very much (about 640 X 480), although the display settings seems to be high.