runlevel 3 设置显示参数

Linux: How to change the text size or character size in runlevel 3 (text mode)

by LinuxTitli on September 6, 2006 · 0 comments

If you have large size (21") or small size (14") monitor, it is
better to use large/small character size. But how do you setup
character size in runlevel 3 under Linux?

The answer is simple, use the kernel framebuffer. It allows you to
set the Linux text scree (console) to higher or lower resolution. The Linux framebuffer (fbdev)
is a graphic hardware-independent abstraction layer to show graphics on
a console without relying on system-specific libraries such as SVGALib
or the heavy overhead of the X Window System.

Open GRUB configuration file grub.conf

# vi grub.conf

Append line vga=0x318 (a 24-bit color depth @ 1024x768 display) to kernel line. At the end your modification should look like as follows:

title           Debian Linux, AMD-VSNL (VMWARE)

root           (hd1,0)

kernel        /boot/vmlinuz-2.6.17.11-ROCKY-DEV-AMD root=/dev/hdb1 ro vga=0x318

initrd          /boot/initrd.img-2.6.17.11-ROCKY-DEV-AMD

savedefault

boot

Save and close the file. Reboot the system:

# reboot

0x318 (hex) is a mode. Here are common modes: