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1 | [This file is cloned from VesaFB/matroxfb] |
2 | |
3 | What is aty128fb? |
4 | ================= |
5 | |
6 | This is a driver for a graphic framebuffer for ATI Rage128 based devices |
7 | on Intel and PPC boxes. |
8 | |
9 | Advantages: |
10 | |
11 | * It provides a nice large console (128 cols + 48 lines with 1024x768) |
12 | without using tiny, unreadable fonts. |
13 | * You can run XF68_FBDev on top of /dev/fb0 |
14 | * Most important: boot logo :-) |
15 | |
16 | Disadvantages: |
17 | |
18 | * graphic mode is slower than text mode... but you should not notice |
19 | if you use same resolution as you used in textmode. |
20 | * still experimental. |
21 | |
22 | |
23 | How to use it? |
24 | ============== |
25 | |
26 | Switching modes is done using the video=aty128fb:<resolution>... modedb |
27 | boot parameter or using `fbset' program. |
28 | |
29 | See Documentation/fb/modedb.txt for more information on modedb |
30 | resolutions. |
31 | |
32 | You should compile in both vgacon (to boot if you remove your Rage128 from |
33 | box) and aty128fb (for graphics mode). You should not compile-in vesafb |
34 | unless you have primary display on non-Rage128 VBE2.0 device (see |
35 | Documentation/fb/vesafb.txt for details). |
36 | |
37 | |
38 | X11 |
39 | === |
40 | |
41 | XF68_FBDev should generally work fine, but it is non-accelerated. As of |
42 | this document, 8 and 32bpp works fine. There have been palette issues |
43 | when switching from X to console and back to X. You will have to restart |
44 | X to fix this. |
45 | |
46 | |
47 | Configuration |
48 | ============= |
49 | |
50 | You can pass kernel command line options to vesafb with |
51 | `video=aty128fb:option1,option2:value2,option3' (multiple options should |
52 | be separated by comma, values are separated from options by `:'). |
53 | Accepted options: |
54 | |
55 | noaccel - do not use acceleration engine. It is default. |
56 | accel - use acceleration engine. Not finished. |
57 | vmode:x - chooses PowerMacintosh video mode <x>. Deprecated. |
58 | cmode:x - chooses PowerMacintosh colour mode <x>. Deprecated. |
59 | <XxX@X> - selects startup videomode. See modedb.txt for detailed |
60 | explanation. Default is 640x480x8bpp. |
61 | |
62 | |
63 | Limitations |
64 | =========== |
65 | |
66 | There are known and unknown bugs, features and misfeatures. |
67 | Currently there are following known bugs: |
68 | + This driver is still experimental and is not finished. Too many |
69 | bugs/errata to list here. |
70 | |
71 | -- |
72 | Brad Douglas <brad@neruo.com> |
73 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
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