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Old 08-26-04, 06:55 AM   #1
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Join Date: May 2003
Posts: 24
Default Signal Corruption - Setup Issue

I am trying to use DVI input to a projector from my linux box but the output is very noisy. The same projector can be used from a windows box.

Linux box base intall RH7.2
Kernel upgraded to 2.4.20
Nvidia GeForce FX 5700
Driver 1.0-6111
XFree 4.2 (with RH install)

Attached are my logs and Config files. X run with logverbose 5.

I see a noisy line on the left hand side, top to bottom. The monitor does not provide frequency information so I added that myself (random values). Without that could not have a signal on the projector.
Attached Files
File Type: txt XF86Config-4.txt (2.8 KB, 131 views)
File Type: zip XFree86.0.zip (62.9 KB, 110 views)

Last edited by pranay; 08-27-04 at 03:18 AM.
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Old 08-26-04, 07:16 AM   #2
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Join Date: May 2003
Posts: 24
Default Re: DVI output to the projector has noise

Adding to the information in the first post.

System still running I plugged out the DVI from the projector to a DELL-FP. I could still see the noisy line. Rebooted; this time with the DELL-FP on the end of the DVI cable.All works well.

Hence the setup with the projector itself is wrong. The signal shows noise on a working FlatPanel as well.

===== Additions ====
Did more tests. This time plugged out the DVI from a working DELL-FP and plugged in to the projector and the output is good.

So the problem is with the initial setup between the projector and card. I tried to use Option "IgnoreEDID" "True". That does not help. What else can I do.

Last edited by pranay; 08-27-04 at 03:21 AM.
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