CentOS Connect monitor causes screen display to tilt

Today, when a Dell old CentOS6.5 server was tuned in, the monitor found that the screen was completely tilted and the font was not clear at all.

Solution: Change the screen of the display can be (IDC room is generally available ha).

Online Check the information, find several solutions, paste:

for CentOS OS 6.5 or 6.5 the previous version : 

Enter the optical drive system boot system installation interface, the following failure occurred

The first type: the server directly connected to the widescreen display, the screen will appear tilted state;

The second type: through Remote control card access server installed operating system, the screen will appear beyond the display range

WORKAROUND: Do not select the default installation option

Installor upgrade An existing system to install or upgrade existing systems

Select the second item: Install system with basic video driver The installation process with the base graphics driver

The problem will be solved. Or when the installation starts, adding "vga=711″ parameters can also solve this problem

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for Centos7 version : 

Workaround:

when the installation starts, add the Nomodeset parameter.

If you are already installed, you can modify the Vi/etc/sysconfig/grub,

Add the nomodeset parameter: Add the Nomodeset parameter at the end of the Grub_cmdline_linux line. For example I have the following:

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then execute:grub2-mkconfig-o/boot/grub2/grub.cfg

CentOS Connect monitor causes screen display to tilt