2024 Apr. 24 (Wed.) モニタ 非接続 で起動: nomodeset [長年日記]
_ GRUB
cat /etc/default/grub| grep nomodeset
GRUB_CMDLINE_LINUX="crashkernel=1G-4G:192M,4G-64G:256M,64G-:512M resume=/dev/mapper/rl_standby-swap rd.lvm.lv=rl_standby/root rd.lvm.lv=rl_standby/swap nomodeset"
_ unchor [■GRUB_CMDLINE_LINUX ipv6.disable=1 grub2-mkconfig ..]