)
Two options are common to most of the video drivers:
accel
Turns on video acceleration using the GPU. If the driver (or chip revision!) has
bugs, accelerated drawing my be incorrect??”for example, lines may not join
together properly or drawing artifacts such as dots, line segments, or improperly
filled areas may be visible. Turning off acceleration may fix these problems, but
the main CPU is much slower at performing graphics operations than the GPU,
so performance will take a significant hit. The default for most drivers is to turn
acceleration on.
3.13
58 Chapter 3: Basic X.org Configuration
hw_cursor or sw_cursor
Selects whether the mouse cursor will be handled in hardware or in software.
Hardware cursor handling uses the sprite or overlay capabilities of the graphics
card to superimpose the image of the mouse cursor on the main image. Software
cursor handling requires the server to save the pixels that will be covered by the
cursor, and then draw in the cursor. When the cursor is moved, the original pixels
are restored, and then the process is repeated at the new cursor location.
Obviously, software cursor handling is much slower and may result in cursor
flickering, but it may be required for certain buggy chipsets and exotic video
modes.
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