Table of Contents
To control a monitor, DDCcontrol must access to the I2C bus of the graphics card. There are two methods to do so: the first one uses /dev/i2c-* devices provided by kernel drivers (abbreviated by dev in tables), the second one reads and writes directly in the card PCI memory (abbreviated by PCI in the tables).
Depending on your hardware, one method or the other works, or even both.
ATI Radeon cards only work with /dev/i2c-* devices. To use them, you must load the radeonfb module by typing, as root:
# modprobe radeonfb
The kernel configuration options needed to enable Radeon framebuffer driver and I2C support are:
These ATI cards have been reported to work, but others models should also work. If yours is not listed, please send a message to one of the DDCcontrol mailing lists (see Appendix A, Report problems and successes).
Name | Works | |
---|---|---|
dev | PCI | |
Radeon 7500 | Yes | No |
Radeon 9200 | Yes | No |
Radeon 9500 | Yes | No |
Radeon 9550 SE | Yes | No |
Radeon 9600 Pro | Yes | No |
Radeon 9700 | Yes | No |