From Linux Man Pages
vesa - Generic VESA video driver
SYNOPSIS
Section "Device"
Identifier "devname"
Driver "vesa"
...
EndSection
DESCRIPTION
vesa is an Xorg driver for generic VESA video cards. It can drive most VESA-compatible video cards, but only
makes use of the basic standard VESA core that is common to these cards. The driver supports depths 8, 15 16 and
24.
SUPPORTED HARDWARE
The vesa driver supports most VESA-compatible video cards. There are some known exceptions, and those should be
listed here.
CONFIGURATION DETAILS
Please refer to xorg.conf(5) for general configuration details. This section only covers configuration details
specific to this driver.
The driver auto-detects the presence of VESA-compatible hardware. The ChipSet name may optionally be specified
in the config file "Device" section, and will override the auto-detection:
"vesa"
The following driver Options are supported:
Option "ShadowFB" "boolean"
Enable or disable use of the shadow framebuffer layer. Default: on.
This option is recommended for performance reasons.
Option "ModeSetClearScreen" "boolean"
Clear the screen on mode set. Some BIOSes seem to be broken in the sense that the newly set video mode is
bogus if they are asked to clear the screen during mode setting. If you experience problems try to turn
this option off. Default: on.
RELATED
Xorg(1), xorg.conf(5), xorgcfg(1), xorgconfig(1), Xserver(1), X(7)
CATEGORY