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Old 09-04-07, 05:48 PM   #13
mguthaus
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Default Re: 100.14.11 - NVIDIA(GPU-0): Unable to read EDID for display device DFP-0

I have two identical Dell Optiplex 740n machines with Dell 1908FPt monitors. They both run identical CentOS5 installs.

I installed the same NVIDIA driver on each and one of them doesn't work! The difference in the Xorg.0.log is this:
6c6
< Current Operating System: Linux XXX 2.6.18-8.1.8.el5 #1 SMP Tue Jul 10 06:39:17 EDT 2007 x86_64
---
> Current Operating System: Linux YYY 2.6.18-8.1.8.el5 #1 SMP Tue Jul 10 06:39:17 EDT 2007 x86_64
15c15
< (==) Log file: "/var/log/Xorg.0.log", Time: Tue Sep 4 15:19:38 2007
---
> (==) Log file: "/var/log/Xorg.0.log", Time: Tue Sep 4 15:37:29 2007
339d338
< (WW) NVIDIA(GPU-0): Unable to read EDID for display device CRT-0
345d343
< (--) NVIDIA(0): CRT-0
347d344
< (--) NVIDIA(0): CRT-0: 350.0 MHz maximum pixel clock
350c347
< (II) NVIDIA(0): Assigned Display Device: CRT-0
---
> (II) NVIDIA(0): Assigned Display Device: DFP-0
357,360c354,356
< (II) NVIDIA(0): Virtual screen size determined to be 1024 x 768
< (WW) NVIDIA(0): Unable to get display device CRT-0's EDID; cannot compute DPI
< (WW) NVIDIA(0): from CRT-0's EDID.
< (==) NVIDIA(0): DPI set to (75, 75); computed from built-in default
---
> (II) NVIDIA(0): Virtual screen size determined to be 1280 x 1024
> (--) NVIDIA(0): DPI set to (85, 86); computed from "UseEdidDpi" X config
> (--) NVIDIA(0): option

After this, machine XXX has no display in X11, but still works in terminal mode. I tried these fixes:

1) I swapped the LCD displays. No change, machine XXX still couldn't read the EDID.

2) I swapped the cables (identical, mind you). No change, machine XXX still couldn't read the EDID.

What do I do now? These machines should be IDENTICAL! I even checked the revision on the DVI card and the monitor. They are the same...

Matt
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Old 09-04-07, 05:53 PM   #14
netllama
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Default Re: 100.14.11 - NVIDIA(GPU-0): Unable to read EDID for display device DFP-0

This suggests that the problem is the graphics card. Does the problem follow the card if you swap it between systems?
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Old 09-05-07, 09:07 PM   #15
mguthaus
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Default Re: 100.14.11 - NVIDIA(GPU-0): Unable to read EDID for display device DFP-0

I will try that early next week.
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Old 09-10-07, 11:25 AM   #16
mguthaus
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Default Re: 100.14.11 - NVIDIA(GPU-0): Unable to read EDID for display device DFP-0

It turns out that my video card is Integrated NIVIDA Quadro NVS 210S Graphics so I can't really swap it. I did, however, swap the DVI riser card and this did not move the problem. I guess I'm going to get a new motherboard from Dell...
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Old 09-10-07, 12:35 PM   #17
lizardkingg
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Default Re: 100.14.11 - NVIDIA(GPU-0): Unable to read EDID for display device DFP-0

Intro: Same problem here with a 8800 GTS + BenQ FP91GP

So I want to try the CustomEDID-way, therefore I have to know how to set the other EDID-related commands like
  • Option "UseEdidFreqs" "x"
  • Option "UseEDID" "x"
  • Option "UseEdidDpi" "x"
when I use CustomEDID.

Maybe someone who has succeded with the CustomEDID-method could post his xorg.conf to have a comparison what should work.

Thanks in advantage!
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Old 09-11-07, 12:48 AM   #18
Lost Dog
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Default Re: 100.14.11 - NVIDIA(GPU-0): Unable to read EDID for display device DFP-0

This is interesting... I had a similar problem (unsolved) this weekend while working on a friend's system.

The TV is a NuVision 37" LCD with a native resolution of 1080p (1920x1080@60hz I believe). For the life of us we could not get it working using DVI->HDMI. The maximum resolution was 800x600.

Next time I get the chance I'll try the custom EDID trick and see if it works.
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Old 09-11-07, 02:12 AM   #19
lizardkingg
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Default Re: 100.14.11 - NVIDIA(GPU-0): Unable to read EDID for display device DFP-0

I tried to do the CustomEDID-way but there is a significant trap

I usually operate the TFT via a DVI cable and have the resolution problem (640x480 instead of 1280x1024 as described in posting #17). So I connected the TFT via a simple VGA cable and voila - the right resolution without any XServer hell. But the signal quality is much more worse than the digital processing with DVI.

Instead I just wanted to take my chance to get a hexadecimal EDID-file using nvidia-settings, but there's no option for doing this where it should be.

Could it be the case that an EDID file can just be created if you use a DVI connection?
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Old 12-26-07, 10:38 AM   #20
luctimm
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Default Re: 100.14.11 - NVIDIA(GPU-0): Unable to read EDID for display device DFP-0

Hi folks,

(sorry by my bad bad english)

I've tried to adjust a GeForce 6100 (onboard) with Nvidia Display Driver 169.07 (and 100.14.09) and the second monitor (DVI) isn't working. In Xorg.0.log the message I have is the same yours: "Unable to read EDID for display DFP-0". What is changin in this f******* drive? Anybody I talks have the same problem...
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Old 01-09-08, 01:37 PM   #21
mjucker
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Default Re: 100.14.11 - NVIDIA(GPU-0): Unable to read EDID for display device DFP-0

Quote:
Originally Posted by luctimm
Hi folks,

(sorry by my bad bad english)

I've tried to adjust a GeForce 6100 (onboard) with Nvidia Display Driver 169.07 (and 100.14.09) and the second monitor (DVI) isn't working. In Xorg.0.log the message I have is the same yours: "Unable to read EDID for display DFP-0". What is changin in this f******* drive? Anybody I talks have the same problem...
Hi,

I have the same problem with EDID error on my Laptop W7J with a Samsung 226BW connected. I try different drivers to solve the problem. Sure it's came from a driver bug : my laptop worked fine under a fedora. I have bug now under suse 10.3 with the 169.07 nvidia driver. May be, it's possible there is a conflit between irq 10 (used to get EDID) over the bios, and irq used by kernel ???
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Old 01-06-10, 11:05 AM   #22
dashaun
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Default Re: 100.14.11 - NVIDIA(GPU-0): Unable to read EDID for display device DFP-0

I'm using xubuntu. This thread solved my 640x480 issue months ago. I do suggested updates on a weekly basis and I power off my workstation nightly.

This week, the exact problem came back. My fix:

Code:
Option "CustomEDID" "DFP-1:/etc/X11/edid.bin"
to

Code:
Option "CustomEDID" "DFP-0:/etc/X11/edid.bin"
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Old 09-30-11, 08:58 AM   #23
Andrew Pakh
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Default Re: 100.14.11 - NVIDIA(GPU-0): Unable to read EDID for display device DFP-0

Hello, please help adjust the screen resolution 1440x900, monitor Samsung 940nw, video nvideo GeForce 7025 / NForce 630a, driver 275,21, Linux opensuse 11.4. I can not put a normal resolution, it is not there.
set 1024x768, you need to do to set 1440x900?

xrandr: Failed to get size of gamma for output default
Screen 0: minimum 320 x 240, current 1024 x 768, maximum 1024 x 768
default connected 1024x768+0+0 0mm x 0mm
1024x768 50.0*
800x600 51.0 52.0 53.0
640x480 54.0
512x384 55.0
400x300 56.0 57.0 58.0
320x240 59.0

grep WW /var/log/Xorg.0.log
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[ 17.541] (WW) The directory "/usr/share/fonts/TTF/" does not exist.
[ 17.541] (WW) The directory "/usr/share/fonts/OTF/" does not exist.
[ 17.612] (WW) The directory "/usr/share/fonts/misc/sgi" does not exist.
[ 18.669] (WW) Falling back to old probe method for fbdev
[ 18.676] (WW) Falling back to old probe method for vesa
[ 19.161] (WW) NVIDIA(GPU-0): Unable to read EDID for display device CRT-0
[ 19.163] (WW) NVIDIA(0): Unable to get display device CRT-0's EDID; cannot compute DPI
[ 19.163] (WW) NVIDIA(0): from CRT-0's EDID.

grep EE /var/log/Xorg.0.log
[ 17.498] Current Operating System: Linux linux-ami9 2.6.37.6-0.7-desktop #1 SMP PREEMPT 2011-07-21 02:17:24 +0200 x86_64
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[ 17.650] (II) Loading extension MIT-SCREEN-SAVER
[ 19.597] (EE) ioctl EVIOCGNAME failed: Inappropriate ioctl for device
[ 19.603] (EE) PreInit returned NULL for "ImPS/2 Generic Wheel Mouse

Unable to read EDID for display device CRT-0 !!!
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Old 12-05-11, 03:44 PM   #24
dr4Ke
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Default Re: 100.14.11 - NVIDIA(GPU-0): Unable to read EDID for display device DFP-0

I had a invalid EDID with my ViewSonic VX2025WM since two weeks ago. I just hit this page and it did the trick for me : http://www.grantingersoll.com/2007/0...sonic-vx2025wm

After shuting down my PC, I waited until the monitor went to sleeping mode and disconnected its power cable. After 30 seconds or so, I plugged it back and booted my computer again. My monitor was back.

I'm not sure this is related to your issues.
Hope this helps, anyway.
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