I'm trying to use a dlp light engine from a Mitsubishi hdtv as a pc monitor by driving it directly with dvi from a hd2400xt. I removed the orginal TV electronics, which crashed from time to time with a blue screen. It was not difficult to get a picture, only the color space is not correct. After gamma correction, the display is too bright, leading to some saturation, and the lower order color bits seem to be lost. I'm guessing it is expecting to see greater than 24 bit color, using dual link for this instead of higher resolution. This would make sense if the contrast ratio is high enough to use it. It does use a dual link cable. The 2 bit TMDSA_COLOR_FORMAT field from [GpuF0MMReg:0x7888] of the rv630 seems to refer to using the secondary TMDS channels to transmit the extra bits: TMDSA_COLOR_FORMAT - RW - 32 bits - [GpuF0MMReg:0x7888] Field Name Bits Default ... TMDSA_COLOR_FORMAT 1:0 0x0 Description Controls TMDSA output colour format. Formats 0 and 1 work in single or dual link. Format 2 requires dual link (MSBs on primary link, LSBs on secondary link). 0=Normal (24bpp), Twin-Single 30bpp (8 MSBs of each component), or Dual-Link 48bpp 1=Twin-Link 30bpp (2 LSB of each component) 2=Dual-Link 30bpp 3=Reserved And the "Avivo Display Engine Whitepaper" seems to refer to this capability: " 10-bit and 16-bit DVI output The main benefit of higher color depth is borne by the fact that higher depth means more data per color component or larger color space. For example 10-bits per color offers 64 times more colors than 8-bits (1.07 billion colors), while 16-bits per color lets you experience over 16 million times more colors than 8-bits, for a total of over 280 trillion colors. Therefore, while most LCD panels today are using either 6-bits or 8-bits per color, a migration to 10-bit and higher LCD panels has begun. Presently, there are several generally-available PC displays capable of 10-bits and 16-bits per color, and more such high-end displays are expected to be offered from display vendors going forwards, as they will be able to count on having display sources to drive their higher color depth displays, since the Avivo Display Engine supports both 10-bits and 16-bits per color outputs over dual-link DVI interfaces. Moreover, many DTVs are starting to offer built-in 10-bit support, which along with Avivo’s 10-bit high-fidelity digital output would enable an end-to-end 10-bit pipeline from PC source to DTV, providing the best possible image fidelity possible. " How difficult would it be to modify the radeonhd driver to try to enable this? I don't know for sure that the light engine expects the same formats that AMD provides, even if it is using enhanced color depth with dual link, as well, although it should. Thanks, Andrew Shor -- To unsubscribe, e-mail: radeonhd+unsubscribe@opensuse.org For additional commands, e-mail: radeonhd+help@opensuse.org