Hello.

I have problems controlling/adjusting monitor parameters (brightness, contrast, color etc.) in Linux, with software tools like DDCcontrol.

Buttonless LCD monitors like Samsung 173P, 193P are controlled through their software (MagicTune) to adjust parameters like brightness, contrast, color etc. This is done using DDC/CI protocol.
The big problem: this software is supported only under Windows. An alternative under Linux is DDCcontrol.
I’ve tested DDCcontrol with Samsung 193Pplus and RIVA TNT, under Fedora Core4 (P3, VIA chipset). Everything worked flawlessly.

Now I’m trying to use DDCcontrol with the same Samsung 193Pplus and ATI Radeon 9250 AGP8x/4x, on another computer (Compaq Deskpro EN, Pentium 3, Intel 815 chipset, AGP4x) with MSI ATI Radeon 9250 but it seems it doesn’t function.

DDCcontrol is using direct PCI memory access for Nvidia and i2c-dev for ATI (details here)
I think the problem is with i2c-dev or with the framebuffer driver for ATI.
I receive no answer after: How can I check if it’s everything OK with i2c-dev and with the framebuffer for ATI under Fedora Core4?

I need your help to solve this problem.
Thank you.

Emil

According to the documentation at:
ddccontrol.sourceforge.net/doc/latest/apc.html#id282082
it seems that you don't need i2c device support for ATI Radeon GPU's.
I am concidering the purchase of a buttonless LCD monitor, Samsung 960BF and would be very interested in hearing about your experience with your buttonless monitor in Linux.

With the new version of ddccontrol (0.3) I can control the 193Pplus monitor under Linux with direct PCI memory access, without problems.

Regarding your monitor: "There is no support for this monitor yet, but there will be no problem to add support for it, as the same model, but with 17" screen size, is supported (760BF)."

Samsung 960BF would be detected like SAM01E5 for the digital connection and SAM01E4 for the analog connection.
This means that you must use the SAM01E5.xml and SAM01E4.xml files.