Problem after Nvidia graphics card driver uninstallation and uninstallation in Linux

Problem after Nvidia graphics card driver uninstallation and uninstallation in Linux

Since the Nvidia graphics card driver is installed in Ubuntu and is always on the cyclic logon interface after it is started, the correct password cannot be entered, and then the Nvidia graphics card driver is uninstalled.

The first step is to use tty1 to log on.

$ Sudo apt-get autoremove -- purge nvidia -*

$ Sudo reboot

Then I found that I was able to enter the desktop when I started the desktop. The result was that the switch to tty mode was a black screen. In fact, it was not a black screen because the screen resolution problem occurred after the nvidia driver was uninstalled.

This problem was solved successfully with the help of senior engineers. The method is as follows:

$ Sudo vi/etc/default/grub

In the grub file, add a parameter GRUB_CMDLINE_LINUX = "" and change it to GRUB_CMDLINE_LINUX = "vga = 792". 792 represents the hexadecimal 0x0318 code of the 1024*768 resolution.

$ Sudo update-grub

Find your own screen VGA parameter code, the VGA parameter of Linux kernel

In a Linux system, if the "vga =" parameter is not specified, the system does not support the frameBuffer device,

By default, the tty resolution provided by the kernel is very limited. The solution is to pass the VGA parameter to the kernel.

1. How to Set lilo

Lilo: linux vga = 318

The 1024x768x24bpp mode is enabled. The following is the encoding of common resolution + color.

Color	640x400	640x480	800x600	1024x768	1280x1024	1600x1200
4 bits	?	?	Zero x 302	?	?	?
8 bits	Zero x 300	Zero x 301	Zero x 303	Zero x 305	Zero x 307	0x31C
15 bits	?	Zero x 310	Zero x 313	Zero x 316	Zero x 319	0x31D
16 bits	?	Zero x 311	Zero x 314	Zero x 317	0x31A	0x31E
24 bits	?	Zero x 312	Zero x 315	Zero x 318	0x31B	0x31F
32 bits	?	?	?	?	?	?

 

If you want to set the value to 1024x768x24bpp by default, you can modify/etc/lilo. conf and add the following statement:

Vga = 0x318

Save and exit, and restart.

2. setting methods in GRUB

Add the vga parameter at the end of the kernel in the grub. conf startup list. For example, set the tty resolution to (800x600x65536)

Cat/etc/grub. conf
# Grub. conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a/boot partition. This means that
# All kernel and initrd paths are relative to/boot/, eg.
# Root (hd0, 0)
# Kernel/vmlinuz-version ro root =/dev/sda3
# Initrd-version.img/initrd
# Boot =/dev/sda
Default = 0
Timeout = 5
Splashimage = (hd0, 0)/grub/splash.xpm.gz
Hiddenmenu
Title Red Hat Enterprise Linux AS (2.6.9-22.EL)
Root (hd0, 0)
Kernel/vmlinuz-2.6.9-22.EL ro root = LABEL =/vga = 788
Initrd/initrd-2.6.9-22.EL.img

The following lists common parameters

Linux video = vga16 (640x480x16) <--- default parameter, supports the most common hardware :)
Vga = 769 (640x480x256)
Vga = 771 (800x600x256)
Vga = 788 (800x600x65536)
Vga = 773 (1024x768x256)
Vga = 791 (1024x768x65536)

After modification and zhcon (http://sourceforge.net/projects/zhcon) or cce (http://sourceforge.net/projects/cce2k/) more perfect.
(Large resolution + Chinese display + Chinese Input)
The following is a list of all resolutions:

# VESA framebuffer console @ 1024x768x64 k vga = 791
# Normal VGA console # vga = normal
# VESA framebuffer console @ 1024x768x64 k
# Vga = 791 # VESA framebuffer console @ 1024x768x32 k
# Vga = 790 # VESA framebuffer console @ 1024x768x256
# Vga = 773 # VESA framebuffer console @ 800x600x64 k
# Vga = 788 # VESA framebuffer console @ 800x600x32 k
# Vga = 787 # VESA framebuffer console @ 800x600x256
# Vga = 771 # VESA framebuffer console @ 640x480x64 k
# Vga = 785 # VESA framebuffer console @ 640x480x32 k
# Vga = 784 # VESA framebuffer console @ 640x480x256
# Vga = 1, 769

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