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1 | $Id: tgafb.txt,v 1.1.2.2 2000/04/04 06:50:18 mato Exp $ |
2 | |
3 | What is tgafb? |
4 | =============== |
5 | |
6 | This is a driver for DECChip 21030 based graphics framebuffers, a.k.a. TGA |
7 | cards, which are usually found in older Digital Alpha systems. The |
8 | following models are supported: |
9 | |
10 | ZLxP-E1 (8bpp, 2 MB VRAM) |
11 | ZLxP-E2 (32bpp, 8 MB VRAM) |
12 | ZLxP-E3 (32bpp, 16 MB VRAM, Zbuffer) |
13 | |
14 | This version is an almost complete rewrite of the code written by Geert |
15 | Uytterhoeven, which was based on the original TGA console code written by |
16 | Jay Estabrook. |
17 | |
18 | Major new features since Linux 2.0.x: |
19 | |
20 | * Support for multiple resolutions |
21 | * Support for fixed-frequency and other oddball monitors |
22 | (by allowing the video mode to be set at boot time) |
23 | |
24 | User-visible changes since Linux 2.2.x: |
25 | |
26 | * Sync-on-green is now handled properly |
27 | * More useful information is printed on bootup |
28 | (this helps if people run into problems) |
29 | |
30 | This driver does not (yet) support the TGA2 family of framebuffers, so the |
31 | PowerStorm 3D30/4D20 (also known as PBXGB) cards are not supported. These |
32 | can however be used with the standard VGA Text Console driver. |
33 | |
34 | |
35 | Configuration |
36 | ============= |
37 | |
38 | You can pass kernel command line options to tgafb with |
39 | `video=tgafb:option1,option2:value2,option3' (multiple options should be |
40 | separated by comma, values are separated from options by `:'). |
41 | Accepted options: |
42 | |
43 | font:X - default font to use. All fonts are supported, including the |
44 | SUN12x22 font which is very nice at high resolutions. |
45 | |
46 | mode:X - default video mode. The following video modes are supported: |
47 | 640x480-60, 800x600-56, 640x480-72, 800x600-60, 800x600-72, |
48 | 1024x768-60, 1152x864-60, 1024x768-70, 1024x768-76, |
49 | 1152x864-70, 1280x1024-61, 1024x768-85, 1280x1024-70, |
50 | 1152x864-84, 1280x1024-76, 1280x1024-85 |
51 | |
52 | |
53 | Known Issues |
54 | ============ |
55 | |
56 | The XFree86 FBDev server has been reported not to work, since tgafb doesn't do |
57 | mmap(). Running the standard XF86_TGA server from XFree86 3.3.x works fine for |
58 | me, however this server does not do acceleration, which make certain operations |
59 | quite slow. Support for acceleration is being progressively integrated in |
60 | XFree86 4.x. |
61 | |
62 | When running tgafb in resolutions higher than 640x480, on switching VCs from |
63 | tgafb to XF86_TGA 3.3.x, the entire screen is not re-drawn and must be manually |
64 | refreshed. This is an X server problem, not a tgafb problem, and is fixed in |
65 | XFree86 4.0. |
66 | |
67 | Enjoy! |
68 | |
69 | Martin Lucina <mato@kotelna.sk> |
70 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9