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Old 08-24-09, 01:13 PM   #1
jtbrubaker
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Join Date: Oct 2008
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Default External dual-link display from laptop

I searched the forums and tried what I could find. Sorry if this has already been discussed.

I have an HP EliteBook 8730w with a NVIDIA Quadro FX 3700M. LFP is 1920x1024, external DFP is a 30in 2560x1600 HP LP3065 connected via-dual link DVI cable from a docking station.

When starting X (currently using 180.44, installing 185.18.36 shortly), the internal display comes up fine and the external remains black. Xorg.0.log shows nothing about the external display.

Setting ConnectedMonitor to DFP-0,DFP-1 reports:

(--) NVIDIA(0): LGD LP171WU5-TLB1 (DFP-0): 330.0 MHz maximum pixel clock
(--) NVIDIA(0): LGD LP171WU5-TLB1 (DFP-0): Internal Dual Link LVDS
(--) NVIDIA(0): DFP-1: 330.0 MHz maximum pixel clock
(--) NVIDIA(0): DFP-1: Internal Single Link TMDS

So, it would appear that my problem is that DFP-0 is dual link capable but routed to the internal display. DFP-1 is not dual link capable and also does not report any EDID information about the external display. Both have the same clock, although I don't know whether that applies.

It's possible that the hardware does not support this configuration, although HP confirmed the setup before it was ordered.

The "Detect Displays" button reports nothing typically, however with ConnectedMonitor set, it shows a display capable of only incredibly low resolutions (640x360?).

Any suggestions?

Jeff
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File Type: gz nvidia-bug-report.log.gz (31.4 KB, 80 views)

Last edited by jtbrubaker; 08-24-09 at 01:18 PM. Reason: Added attachment
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Old 08-24-09, 02:12 PM   #2
jtbrubaker
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Join Date: Oct 2008
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Default Re: External dual-link display from laptop

185.18.36 resolved the issue. Both DFP-0 and DFP-1 come up as dual-link capable.

Sorry for the noise, I should have tried this before.
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