The problem seems to be solved (workaround) disabling the splash.
I´ve commented this line in the /etc/default/grub file:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
to
#GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
and after run update-grub2
The problem seems to be solved (workaround) disabling the splash.
I´ve commented this line in the /etc/default/grub file:
GRUB_CMDLINE_ LINUX_DEFAULT= "quiet splash"
to
#GRUB_CMDLINE_ LINUX_DEFAULT= "quiet splash"
and after run update-grub2