Ubuntu20.04配置grub ，不必每次都输入 nomodeset

一、查看原来的grub配置：

grep menuentry /boot/grub/grub.cfg

重点注意以下类似的核心版本号

gnulinux-5.15.0-92-generic-advanced-86a86651-8070-4338-92ee-8a1a13a98a05

gnulinux-5.15.0-67-generic-advanced-86a86651-8070-4338-92ee-8a1a13a98a05
                                                                              
 ============================================================   
  二、修改默认的grub配置，不必每次都输入 nomodeset  

   1.打开grub

sudo vim /etc/default/grub

   2.修改grub

 GRUB_CMDLINE_LINUX_DEFAULT="quiet splash”    在末尾添加 nomodeset ，即为：                  GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset"                    

# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
# For full documentation of the options in this file, see:
#   info -f grub -n 'Simple configuration'



GRUB_DEFAULT=gnulinux-5.15.0-92-generic-advanced-86a86651-8070-4338-92ee-8a1a13a98a05
GRUB_TIMEOUT_STYLE=hidden
GRUB_TIMEOUT=10
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset"  #在末尾添加 nomodeset
GRUB_CMDLINE_LINUX=""



# Uncomment to enable BadRAM filtering, modify to suit your needs
# This works with Linux (no patch required) and with any kernel that obtains
# the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)
#GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef"

# Uncomment to disable graphical terminal (grub-pc only)
#GRUB_TERMINAL=console

# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo'
#GRUB_GFXMODE=640x480

# Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux
#GRUB_DISABLE_LINUX_UUID=true

# Uncomment to disable generation of recovery mode menu entries
#GRUB_DISABLE_RECOVERY="true"

# Uncomment to get a beep at grub start
#GRUB_INIT_TUNE="480 440 1"