Hans-Jürgen Koch wrote:

In my boot logs I find the following warnings:

matroxfb: Matrox G550 detected
PInS memtype = 5
matroxfb: MTRR's turned on
matroxfb: 1280x1024x24bpp (virtual: 1280x4369)
matroxfb: framebuffer at 0xD4000000, mapped to 0xf8880000, size 33554432
Console: switching to colour frame buffer device 160x64
fb0: MATROX frame buffer device
matroxfb_crtc2: secondary head of fb0 was registered as fb1
**WARNING** I2C adapter driver [DDC:fb0 #0] forgot to specify physical device; 
fix it!
**WARNING** I2C adapter driver [DDC:fb0 #1] forgot to specify physical device; 
fix it!
**WARNING** I2C adapter driver [MAVEN:fb0] forgot to specify physical device; 
fix it!

Kernel is a vanilla 2.6.20.1. Can somebody please explain this to me? Can I 
ignore these warnings?

Yes, they just warn you that in sysfs tree i2c buses for your monitors 
will appear under platform and not under your g550 device in device 
tree.  There is no functionality impact.

Problem is fixed in 2.6.21-rc1 and newer kernels.
								Petr



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