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Annotated edit history of fbset(8) version 3, including all changes. View license author blame.
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1 perry 1 fbset
2 !!!fbset
3 NAME
4 SYNOPSIS
5 DESCRIPTION
6 OPTIONS
7 EXAMPLE
8 FILES
9 SEE ALSO
10 AUTHORS
11 ----
12 !!NAME
13
14
15 fbset - show and modify frame buffer device settings
16 !!SYNOPSIS
17
18
19 __fbset__ [[''options''] [[''mode'']
20 !!DESCRIPTION
21
22
23 __This documentation is out of date!!__
24
25
26 __fbset__ is a system utility to show or change the
27 settings of the frame buffer device. The frame buffer device
28 provides a simple and unique interface to access different
29 kinds of graphic displays.
30
31
32 Frame buffer devices are accessed via special device nodes
33 located in the /dev directory. The naming scheme for these
34 nodes is always __fb____n''''n'' is
35 the number of the used frame buffer device.
36
37
3 MikeWhit 38 __fbset__ uses its own video mode database located in
1 perry 39 /etc/fb.modes. An unlimited number of video modes can be
40 defined in this database. For further information see
2 perry 41 fb.modes(5).
1 perry 42 !!OPTIONS
43
44
45 If no option is given, __fbset__ will display the current
46 frame buffer settings.
47
48
49 General options:
50
51
52 __--help__, __-h__
53
54
3 MikeWhit 55 display usage information
1 perry 56
57
58 __--now__, __-n__
59
60
61 change the video mode immediately. If no frame buffer device
62 is given via __-fb__ , then this option is activated by
63 default
64
65
66 __--show__, __-s__
67
68
3 MikeWhit 69 display the video mode settings. This is the default if no
1 perry 70 further option or only a frame buffer device via __-fb__
71 is given
72
73
74 __--info__, __-i__
75
76
77 display all available frame buffer information
78
79
80 __--verbose__, __-v__
81
82
3 MikeWhit 83 display information about what __fbset__ is currently
1 perry 84 doing
85
86
87 __--version__, __-V__
88
89
90 display the version information about
91 __fbset__
92
93
94 __--xfree86__, __-x__
95
96
97 display the timing information as it's needed by
98 XFree86
99
100
101 Frame buffer device nodes:
102
103
104 __-fb__ __device''''
105
106
107 ''device'' gives the frame buffer device node. If no
108 device via __-fb__ is given, ''/dev/fb0'' is
109 used
110
111
112 Video mode database:
113
114
115 __-db__ __file''''
116
117
118 set an alternative video mode database file (default is
119 ''/etc/fb.modes''), see also
2 perry 120 fb.modes(5)
1 perry 121
122
123 Display geometry:
124
125
126 __-xres__ __value''''
127
128
129 set visible horizontal resolution (in pixels)
130
131
132 __-yres__ __value''''
133
134
135 set visible vertical resolution (in pixels)
136
137
138 __-vxres__ __value''''
139
140
141 set virtual horizontal resolution (in pixels)
142
143
144 __-vyres__ __value''''
145
146
147 set virtual vertical resolution (in pixels)
148
149
150 __-depth__ __value''''
151
152
153 set display depth (in bits per pixel)
154
155
156 __--geometry__, __-g__ ...
157
158
159 set all geometry parameters at once in the order
160 xres''''yres''''vxres''
161 ''vyres''''depth''''-g__
162 ''640 400 640 400 4''
163
164
165 __-match__
166
167
168 make the physical resolution match the virtual
169 resolution
170
171
172 Display timings:
173
174
175 __-pixclock__ __value''''
176
177
178 set the length of one pixel (in picoseconds). Note that the
179 frame buffer device may only support some pixel
180 lengths
181
182
183 __-left__ __value''''
184
185
186 set left margin (in pixels)
187
188
189 __-right__ __value''''
190
191
192 set right margin (in pixels)
193
194
195 __-upper__ __value''''
196
197
198 set upper margin (in pixel lines)
199
200
201 __-lower__ __value''''
202
203
204 set lower margin (in pixel lines)
205
206
207 __-hslen__ __value''''
208
209
210 set horizontal sync length (in pixels)
211
212
213 __-vslen__ __value''''
214
215
216 set vertical sync length (in pixel lines)
217
218
219 __--timings__, __-t__ ...
220
221
222 set all timing parameters at once in the order
223 pixclock''''left''
224 ''right''''upper''
225 ''lower''''hslen''
226 ''vslen''''-g__ ''35242 64 96 35 12
227 112 2''
228
229
230 Display flags:
231
232
233 __-hsync__ {''low''|''high''}
234
235
236 set the horizontal sync polarity
237
238
239 __-vsync__ {''low''|''high''}
240
241
242 set the vertical sync polarity
243
244
245 __-csync__ {''low''|''high''}
246
247
248 set the composite sync polarity
249
250
251 __-extsync__ {''false''|''true''}
252
253
254 enable or disable external resync. If enabled the sync
255 timings are not generated by the frame buffer device and
256 must be provided externally instead. Note that this option
257 may not be supported by every frame buffer
258 device
259
260
261 __-bcast__ {''false''|''true''}
262
263
264 enable or disable broadcast modes. If enabled the frame
265 buffer generates the exact timings for several broadcast
266 modes (e.g. PAL or NTSC). Note that this option may not be
267 supported by every frame buffer device
268
269
270 __-laced__ {''false''|''true''}
271
272
273 enable or disable interlace. If enabled the display will be
274 split in two frames, each frame contains only even and odd
275 lines respectively. These two frames will be displayed
276 alternating, this way twice the lines can be displayed and
277 the vertical frequency for the monitor stays the same, but
278 the visible vertical frequency gets halved
279
280
281 __-double__ {''false''|''true''}
282
283
284 enable or disable doublescan. If enabled every line will be
285 displayed twice and this way the horizontal frequency can
286 easily be doubled, so that the same resolution can be
287 displayed on different monitors, even if the horizontal
288 frequency specification differs. Note that this option may
289 not be supported by every frame buffer device
290
291
292 Display positioning:
293
294
295 __-move__
296 {''left''|''right''|''up''|''down''}
297
298
299 move the visible part of the display in the specified
300 direction
301
302
303 __-step__ __value''''
304
305
306 set step size for display positioning (in pixels or pixel
307 lines), if __-step__ is not given display will be moved 8
308 pixels horizontally or 2 pixel lines vertically
309 !!EXAMPLE
310
311
312 To set the used video mode for __X__ insert the following
313 in rc.local:
314
315
316 __fbset__ -fb ''/dev/fb0'' vga
317
318
319 and make the used frame buffer device known to
320 __X__:
321
322
323 __export__ FRAMEBUFFER=''/dev/fb0''
324 !!FILES
325
326
327 ''/dev/fb*
328 /etc/fb.modes''
329 !!SEE ALSO
330
331
2 perry 332 fb.modes(5), fbdev(4)
1 perry 333 !!AUTHORS
334
335
336 Geert Uytterhoeven
337
338
339 Roman Zippel
340
341
342 man files
343 ----
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