Hi,

With both my G200 and G400, the DDC2 (I2C) driver doesn't find the monitor
attached. The monitor info returned is (nil). Used monitors are Iiyama
4332 and Philips 150 B3, both DDC2 capable TFT screens. Now I must really
hack the config file to prevent Xfree from entering a mode with too high
vsync speed.

The code is known to work for the Radeon driver, so I assume the bug is in
the Matrox driver. I have been playing around a little with it, but no
result. What I can understand from the docs, the code is right. I tested
with LEDs on the SDA and SCL lines whether the bits used in the driver are
really the SDA and SCL lines, this looks ok. I was unable to test whether
the I2C "high" is really tristated when it should be, for instance at the
moment the DDC-rom should ACK on address 0xA0. This is the last issue I
can think of.

XFree 4.2 & 4.3 (both Mandrake 9.0 RPMs) on Intel Pentium II SMP and PIII
UP

Does anyone have clues how to debug this further ? Reason I'm so eager to
know is that besides I don't like hacking the config files while a monitor
should be able to tell itself, I want to use DDC2 too in the KGIproject
(kgi-wip.sourceforge.net), and the XFree source code is the best help.

Please cc me in reply, I'm not subscribed.

Best regards, Jos Hulzink

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