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ab42b818 | 1 | ============= |
fa20c8a6 | 2 | What is gxfb? |
ab42b818 MCC |
3 | ============= |
4 | ||
5 | .. [This file is cloned from VesaFB/aty128fb] | |
fa20c8a6 AS |
6 | |
7 | This is a graphics framebuffer driver for AMD Geode GX2 based processors. | |
8 | ||
9 | Advantages: | |
10 | ||
11 | * No need to use AMD's VSA code (or other VESA emulation layer) in the | |
12 | BIOS. | |
13 | * It provides a nice large console (128 cols + 48 lines with 1024x768) | |
14 | without using tiny, unreadable fonts. | |
15 | * You can run XF68_FBDev on top of /dev/fb0 | |
16 | * Most important: boot logo :-) | |
17 | ||
18 | Disadvantages: | |
19 | ||
20 | * graphic mode is slower than text mode... | |
21 | ||
22 | ||
23 | How to use it? | |
24 | ============== | |
25 | ||
26 | Switching modes is done using gxfb.mode_option=<resolution>... boot | |
ab42b818 | 27 | parameter or using `fbset` program. |
fa20c8a6 | 28 | |
ab42b818 | 29 | See Documentation/fb/modedb.rst for more information on modedb |
fa20c8a6 AS |
30 | resolutions. |
31 | ||
32 | ||
33 | X11 | |
34 | === | |
35 | ||
36 | XF68_FBDev should generally work fine, but it is non-accelerated. | |
37 | ||
38 | ||
39 | Configuration | |
40 | ============= | |
41 | ||
42 | You can pass kernel command line options to gxfb with gxfb.<option>. | |
43 | For example, gxfb.mode_option=800x600@75. | |
44 | Accepted options: | |
45 | ||
ab42b818 MCC |
46 | ================ ================================================== |
47 | mode_option specify the video mode. Of the form | |
48 | <x>x<y>[-<bpp>][@<refresh>] | |
49 | vram size of video ram (normally auto-detected) | |
50 | vt_switch enable vt switching during suspend/resume. The vt | |
51 | switch is slow, but harmless. | |
52 | ================ ================================================== | |
fa20c8a6 | 53 | |
fa20c8a6 | 54 | Andres Salomon <dilinger@debian.org> |