Hi all,
I'm trying to get a Rage 128 GL from a B&W G3 (transplanted into a Beige G3) to output in 1080p60 in Mac OS X Server 1.2. It does show up as an option if I enable all resolutions instead of just recommended, and it does actually display over VGA, but it is offset way too far to the right to adjust out with the horizontal adjustment. I have repeated this on two screens, a newer TV and a 21.5 inch iMac converted into a display with one of those cheap driver boards from China. I also tried on an older TV, but it didn't display anything at all. I don't know if that TV could take a 60 hertz signal at 1080, though, because it was a very early "Full HD" set. I'm just wondering if anyone else has tried anything like this or is able to test it easily. It's hard for me to rule out different things since I only have one Rage 128. I think the screen being shifted to the right means that the boards are reading the Horizontal Sync signal wrong and displaying the "front porch" of the display lines? Maybe the board is looking for 59 and getting 60 or vice versa? The only options I have are "60" and "75", unfortunately... (On one display, 75 gives me nothing, on the other it jumps all over the place and actually doubles the image in that space that was black at 60hz on the left side with the part that was cut from the right overlaid on top of the actual left side of the screen.) I'm wondering if one possible solution could be injecting my own Hsync signal, or even just passing the existing signal through a microcontroller and delay it to push the display further left? I also wonder if a higher quality VGA to HDMI convertor could handle the signal better and work by putting HDMI into the display instead of VGA. The Chinese driver board is obviously kind of cheapo and I imagine the VGA input on the Insignia TV I tested on was probably the same kind thing. Thinking about picking up a Startech VGA to HDMI convertor and trying it. I doubt there's any way in software to adjust the way the card is working? Any suggestions are appreciated.
Thanks,
Zack
I'm trying to get a Rage 128 GL from a B&W G3 (transplanted into a Beige G3) to output in 1080p60 in Mac OS X Server 1.2. It does show up as an option if I enable all resolutions instead of just recommended, and it does actually display over VGA, but it is offset way too far to the right to adjust out with the horizontal adjustment. I have repeated this on two screens, a newer TV and a 21.5 inch iMac converted into a display with one of those cheap driver boards from China. I also tried on an older TV, but it didn't display anything at all. I don't know if that TV could take a 60 hertz signal at 1080, though, because it was a very early "Full HD" set. I'm just wondering if anyone else has tried anything like this or is able to test it easily. It's hard for me to rule out different things since I only have one Rage 128. I think the screen being shifted to the right means that the boards are reading the Horizontal Sync signal wrong and displaying the "front porch" of the display lines? Maybe the board is looking for 59 and getting 60 or vice versa? The only options I have are "60" and "75", unfortunately... (On one display, 75 gives me nothing, on the other it jumps all over the place and actually doubles the image in that space that was black at 60hz on the left side with the part that was cut from the right overlaid on top of the actual left side of the screen.) I'm wondering if one possible solution could be injecting my own Hsync signal, or even just passing the existing signal through a microcontroller and delay it to push the display further left? I also wonder if a higher quality VGA to HDMI convertor could handle the signal better and work by putting HDMI into the display instead of VGA. The Chinese driver board is obviously kind of cheapo and I imagine the VGA input on the Insignia TV I tested on was probably the same kind thing. Thinking about picking up a Startech VGA to HDMI convertor and trying it. I doubt there's any way in software to adjust the way the card is working? Any suggestions are appreciated.
Thanks,
Zack
