Hi All,
After many year I'm back with an SGI. Back in the day I used to have a number of systems ranging from desktops to servers. As the story goes I sold them all. I few weeks back I came across a Tezro. Installed a fresh copy of 6.5.30 and hooked it up to two LCD's (EIZO ev2455). The panels are native 1920x1200.
I am able to run 2@1920x1080_60_ds, but both 2@1920x1200_60p and 2@1920x1200_60_ds are giving me issues. 2@1920x1200_60p gives me an invalid signal and 2@1920x1200_60_ds doesn't give any signal which makes sense as the pixel clock of 184.66Mhz is outside the DVI spec due to large blanking space.
2@1920x1200_60p is actually really close to what monitor should be able to accept:
60hz Horizontal
72.78Khz Vertical
153.71Mhz Pixel clock
Retrieved the EDID with my macbook from the monitor:
Code:
Mode = 1920 × 1200 @ 59.950Hz
Pixel Clock............. 154.00 MHz Non-Interlaced
Horizontal Vertical
Active.................. 1920 pixels 1200 lines
Front Porch............. 48 pixels 3 lines
Sync Width.............. 32 pixels 6 lines
Back Porch.............. 80 pixels 26 lines
Blanking................ 160 pixels 35 lines
Total................... 2080 pixels 1235 lines
Scan Rate............... 74.038 kHz 59.950 Hz
The biggest difference is the front and back porch being larger resulting in a higher horizontal scan rate compared to 2@1920x1200_60p.
The mode line should look like:
Code:
Modeline "1920x1200" 154 1920 1968 2000 2080 1200 1203 1209 1235 -hsync
Reading through the old Nekochan archive I found that creating DCD vfo's is some sort of black magic and only a few have been able to do it but unfortunately no instructions.
Is there anyone here who can help me create the vfo or create one for me?
