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2 The Frame Buffer Device
11 The frame buffer device provides an abstraction for the graphics hardware. It
12 represents the frame buffer of some video hardware and allows application
24 From the user's point of view, the frame buffer device looks just like any
26 specifies the frame buffer number.
31 0 = /dev/fb0 First frame buffer
32 1 = /dev/fb1 Second frame buffer
34 31 = /dev/fb31 32nd frame buffer
44 The frame buffer devices are also `normal` memory devices, this means, you can
49 There also can be more than one frame buffer at a time, e.g. if you have a
51 buffer devices (/dev/fb0 and /dev/fb1 etc.) work independently.
53 Application software that uses the frame buffer device (e.g. the X server) will
55 an alternative frame buffer device by setting the environment variable
56 $FRAMEBUFFER to the path name of a frame buffer device, e.g. (for sh/bash
65 After this the X server will use the second frame buffer.
71 As you already know, a frame buffer device is a memory device like /dev/mem and
74 appears in the special file is not the whole memory, but the frame buffer of
104 etc.), because it works on the frame buffer image data directly.
106 For the future it is planned that frame buffer drivers for graphics cards and
113 3. Frame Buffer Resolution Maintenance
116 Frame buffer resolutions are maintained using the utility `fbset`. It can
117 change the video mode properties of a frame buffer device. Its main usage is
129 buffer device. Starting with XFree86 release 3.2, the X server is part of
146 same virtual desktop size. The frame buffer device that's used is still
252 The frame buffer device expects all horizontal timings in number of dotclocks
256 6. Converting XFree86 timing values info frame buffer device timings
264 The frame buffer device uses the following fields:
305 For more specific information about the frame buffer device and its
325 There is a frame buffer device related mailing list at kernel.org:
353 The frame buffer device abstraction was designed by Martin Schaller.