Intel GMA 950 driving 1920x1080 over DVI?

[Matthias Hopf]

On Apr 17, 07 11:47:21 -0400, Jason Tackaberry wrote:
> The biggest unknown right now is whether or not the DVI port will drive
> a signal at 1920x1080. I'm getting very conflicting information about

Many monitors and some gfx chips can only cope with single link DVI
signals (which max out at 160MHz pixel frequency).

A standard 1920x1080 mode has 173MHz:

> cvt 1920 1080 60
# 1920x1080 59.96 Hz (CVT 2.07M9) hsync: 67.16 kHz; pclk: 173.00 MHz
Modeline "1920x1080_60.00"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync

while a reduced blanking mode (with less time reserved for horizontal and
vertical blanking, which is needed for CRTs but not for LCDs) has only
136Mhz and will thus work:

> cvt -r 1920 1080 60
# 1920x1080 59.93 Hz (CVT 2.07M9-R) hsync: 66.59 kHz; pclk: 138.50 MHz
Modeline "1920x1080R"  138.50  1920 1968 2000 2080  1080 1083 1088 1111
+hsync -vsync

You have to make sure that your monitor supports reduced blanking modes
(most, if not all, will).

Matthias

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