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CONFIG_FB_MATROX_MAVEN: G400 second head support

General informations

The Linux kernel configuration item CONFIG_FB_MATROX_MAVEN has multiple definitions:

G400 second head support found in drivers/video/Kconfig

The configuration item CONFIG_FB_MATROX_MAVEN:

Help text

WARNING !!! This support does not work with G450 !!!

Say Y or M here if you want to use a secondary head (meaning two monitors in parallel) on G400 or MGA-TVO add-on on G200. Secondary head is not compatible with accelerated XFree 3.3.x SVGA servers - secondary head output is blanked while you are in X. With XFree 3.9.17 preview you can use both heads if you use SVGA over fbdev or the fbdev driver on first head and the fbdev driver on second head.

If you compile it as module, two modules are created, matroxfb_crtc2 and matroxfb_maven. Matroxfb_maven is needed for both G200 and G400, matroxfb_crtc2 is needed only by G400. You must also load i2c-matroxfb to get it to run.

The driver starts in monitor mode and you must use the matroxset tool (available at <ftp://platan.vc.cvut.cz/pub/linux/matrox-latest/>) to switch it to PAL or NTSC or to swap primary and secondary head outputs. Secondary head driver also always start in 640x480 resolution, you must use fbset to change it.

Also do not forget that second head supports only 16 and 32 bpp packed pixels, so it is a good idea to compile them into the kernel too. You can use only some font widths, as the driver uses generic painting procedures (the secondary head does not use acceleration engine).

G400 second head support found in drivers/video/fbdev/Kconfig

The configuration item CONFIG_FB_MATROX_MAVEN:

Help text

WARNING !!! This support does not work with G450 !!!

Say Y or M here if you want to use a secondary head (meaning two monitors in parallel) on G400 or MGA-TVO add-on on G200. Secondary head is not compatible with accelerated XFree 3.3.x SVGA servers - secondary head output is blanked while you are in X. With XFree 3.9.17 preview you can use both heads if you use SVGA over fbdev or the fbdev driver on first head and the fbdev driver on second head.

If you compile it as module, two modules are created, matroxfb_crtc2 and matroxfb_maven. Matroxfb_maven is needed for both G200 and G400, matroxfb_crtc2 is needed only by G400. You must also load i2c-matroxfb to get it to run.

The driver starts in monitor mode and you must use the matroxset tool (available at <ftp://platan.vc.cvut.cz/pub/linux/matrox-latest/>) to switch it to PAL or NTSC or to swap primary and secondary head outputs. Secondary head driver also always start in 640x480 resolution, you must use fbset to change it.

Also do not forget that second head supports only 16 and 32 bpp packed pixels, so it is a good idea to compile them into the kernel too. You can use only some font widths, as the driver uses generic painting procedures (the secondary head does not use acceleration engine).

Hardware

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