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Old 12-07-06, 11:01 PM   #1
bluevoodoo1
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Angry Ubuntu + 7900 GS + 2nd Monitor

I'm running Ubuntu Edgy with an eVGA 7900 GS and I've been trying to get my second monitor working for about a week now.

I am trying to get both monitors working, each at 1440x900. I can see that the resolution of 2880x900 is being created. If I were to take a screenshot I would be able to see the desktop, though the screen remains blank (it is getting a signal)

I don't care if twinview is used or they are two separate screens, anything that works will be fine.

I have included my convoluted xorg.conf as well as my nvidia-bug-report.log. I've exhausted most things I can think of, and this EDID seems to be the issue.

Code:
bluevoodoo1@ubuntu:~$ cat /var/log/Xorg.0.log | grep WW
	(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(WW) NVIDIA(0): Unable to read EDID for display device DFP-1
Any help would be much appreciated... Thanks.

Code:
Section "Device"
	Identifier	"Nvidia 7900 GS OC 0"
	Driver		"nvidia"
	BusID		"PCI:6:0:0"
	Option 		"ExactModeTimingsDVI" "True"
	Option 		"TwinView" "True"
	Option 		"TwinViewOrientation" "LeftOf"   
	Option 		"UseEdidFreqs" "True"
	Option 		"UseDisplayDevice" "DFP,DFP" 
	Option 		"ConnectedMonitor" "DFP,DFP" 
	Option 		"SecondMonitorHorizSync" "30-82"
	Option 		"SecondMonitorVertRefresh" "56-76"
	
EndSection


Section "Monitor"
	Identifier	"Acer AL1916W 0"
	Option		"DPMS"
	HorizSync	30-82
	VertRefresh	56-76
EndSection


Section "Screen"
	Identifier	"Default Screen One 0"
	Device		"Nvidia 7900 GS OC 0"
	Monitor		"Acer AL1916W 0"
	Option 		"ExactModeTimingsDVI" "True"
	DefaultDepth	24
	Option 		"UseEdidFreqs" "True"
	Option 		"UseDisplayDevice" "DFP,DFP" 
	Option 		"ConnectedMonitor" "DFP,DFP"
	Option 		"MetaModes" "1440x900,1440x900; 1440x900,1440x900"
SubSection "Display"
		Depth		24
		Modes		"1440x900"
	EndSubSection
EndSection


Section "ServerLayout"
	Identifier	"Default Layout"
	Screen		"Default Screen One 0"
	InputDevice	"Generic Keyboard"
	InputDevice	"Configured Mouse"
	InputDevice     "stylus" "SendCoreEvents"
	InputDevice     "cursor" "SendCoreEvents"
	InputDevice     "eraser" "SendCoreEvents"
EndSection

#Section "ServerFlags"
	#Option "Xinerama" "False"
#EndSection

Section "DRI"
	Mode	0666
EndSection

Section "Extensions"
          Option  "Composite" "Enable"
EndSection
Attached Files
File Type: zip nvidia-bug-report.log.zip (31.1 KB, 102 views)
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Old 12-07-06, 11:44 PM   #2
netllama
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Default Re: Ubuntu + 7900 GS + 2nd Monitor

I'd suggest removing the ConnectedMonitor option and retesting with 1.0-9631 or 1.0-9742 as 1.0-8776 is no longer supported.

Thanks,
Lonni
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Old 12-09-06, 09:17 PM   #3
bluevoodoo1
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Arrow Re: Ubuntu + 7900 GS + 2nd Monitor

Ok, here's a new xorg.conf and bug report with the 1.0-9631. Still having the same issue. The other monitor is not getting a signal at all now, though it is showing up in nvidia-settings... Without the ConnectedMonitor option the second monitor does not appear in nvidia-settings. I'm completely stumped...

I've also noticed with the 9631 that the rpm with the card's fan seems to skyrocket with any 3D app that opens. Is this normal?


Code:
bluevoodoo1@ubuntu:~$ cat /var/log/Xorg.0.log | grep WW
(WW) NVIDIA(GPU-0): Unable to read EDID for display device DFP-1
Code:
Section "ServerLayout"
    Identifier     "Default Layout"
    Screen         "Default Screen" #0 0
    InputDevice    "Generic Keyboard"
    InputDevice    "Configured Mouse"
    InputDevice    "stylus" "SendCoreEvents"
    InputDevice    "cursor" "SendCoreEvents"
    InputDevice    "eraser" "SendCoreEvents"
EndSection

Section "Monitor"
    Identifier     "Acer AL1916W"
    Option		"DPMS"
	HorizSync	30-82
	VertRefresh	56-76
EndSection

Section "Device"
        Identifier     "NVIDIA Corporation NVIDIA Default Card"
        Driver         "nvidia"
	BusID		"PCI:6:0:0"
	Option 		"MetaModes" "1440x900,1440x900"
        #Option 		"TwinView" "true"
        #Option 		"TwinViewOrientation" "LeftOf"
        Option 		"SecondMonitorHorizSync" "30.0-82.0"
        Option 		"SecondMonitorVertRefresh" "56.0-76.0"
	    Option		"UseDisplayDevice" "DFP,DFP"
    Option 		"ConnectedMonitor" "DFP,DFP" 
	
EndSection



Section "Screen"
    Identifier     "Default Screen"
    Device         "NVIDIA Corporation NVIDIA Default Card"
    Monitor        "Acer AL1916W"
    DefaultDepth    24
    Option 		"MetaModes" "1440x900,1440x900"
    Option 		"TwinView" "True"
    Option 		"TwinViewOrientation" "LeftOf"
    Option 		"SecondMonitorHorizSync" "28.0-72.0"
    Option 		"SecondMonitorVertRefresh" "43.0-60.0"
    Option		"UseDisplayDevice" "DFP,DFP"
    Option 		"ConnectedMonitor" "DFP,DFP" 
    SubSection     "Display"
        Depth       24
        Modes      "1440x900"
	#ViewPort 0 0
    EndSubSection
EndSection

Section "Extensions"
    Option         "Composite" "Enable"
EndSection
Attached Thumbnails
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Name:	snapshot1.png
Views:	158
Size:	95.0 KB
ID:	22725  
Attached Files
File Type: zip nvidia-bug-report-2.log.zip (29.9 KB, 93 views)
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Old 12-09-06, 09:21 PM   #4
netllama
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Default Re: Ubuntu + 7900 GS + 2nd Monitor

If the 2nd DFP isn't being detected, then that's the problem, and using ConnectedMonitor isn't going to fix that.

Is anything displayed on the 2nd DFP before X is started?
Did you test with 1.0-9742?

Thanks,
Lonni
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Old 12-09-06, 09:29 PM   #5
bluevoodoo1
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Default Re: Ubuntu + 7900 GS + 2nd Monitor

Hi Lonni

No, nothing is being displayed on the 2nd DFP. It does not receive a signal and remains in "standby" mode throughout this. I have not tested this with 9742. Do you think that will help?

Thanks
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Old 12-09-06, 09:48 PM   #6
netllama
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Default Re: Ubuntu + 7900 GS + 2nd Monitor

If nothing is displayed even before starting X, then this isn't a driver issue, its likely a hardware problem.
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Old 12-09-06, 09:56 PM   #7
bluevoodoo1
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Default Re: Ubuntu + 7900 GS + 2nd Monitor

That was my first thought... This is a new system I'm putting together and I'm already on my 2nd motherboard and 2nd video card. Swapped out an Asus M2N SLI and BFG Tech 7900 GS for an ABIT KN9 and eVGA 7900 GS... I also ordered an MSI board (which I haven't tried yet) and is ready to be RMAed as well...

I took one of my old drives and installed XP on it and the 2nd monitor wasn't even recognized there...

The connections work though. If I swap the DVI cables then the "2nd" monitor will work, and the other will remain blank.

I had these 2 monitors running twinview with 2 eVGA fx5500 cards before this-- which makes me think it's the motherboard... or video card...

...
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Old 12-09-06, 10:50 PM   #8
alaric
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Default Re: Ubuntu + 7900 GS + 2nd Monitor

Quote:
Originally Posted by netllama
If nothing is displayed even before starting X, then this isn't a driver issue, its likely a hardware problem.
With both my video cards that I recently tested (FX5200 and now FX6200) I have seen a state in which one monitor (the second head) stops displaying anything (no signal) even after boot: in the case of the FX5200 this started to happen after I upgraded the BIOS of the card. Although it annoyed me that now I had only one monitor before starting X, I thought it was "normal"...

However, when I plugged in my brand new FX6200, I was happy to get the boot screens on both monitors again. When starting X, my machine was suddenly highly unstable (one monitor constantly being 'restarted', parts of the screen not being correctly updated etc). When I killed X, I had again only one display left.

Now, what is interesting here is that I use vbetool to store the state of the video card before I start X, and then automatically restore the state when X returns (normal or with a crash). So, it's almost impossible that one monitor stayed black... but it happened nevertheless. And it stayed that way until I rebooted again.

I am not saying that it is likely to be a driver problem when someone has a black monitor after booting - I'm just saying that there is a possibility that a state on the video card has changed imho. If it EVER gave two signals after boot then this is a strong indication that the hardware should be able to display on both monitors, if initialized/reset correctly.

In the case of my FX5200: this card used to give a signal on both monitors, and when it stopped doing that, it clearly wasn't broken: it still worked fine for dual head under X. So, there is a possibility that your card doesn't display on one head after boot, but CAN still work under X (as did my FX5200).
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Old 12-10-06, 12:28 AM   #9
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Default Re: Ubuntu + 7900 GS + 2nd Monitor

bluevoodoo1,

are you actually using a DVI cable to connect your LCD monitor?
Or are you using a DVI->VGA adaptor and a VGA cable?

I just found out namely why my second monitor stayed black,
and remained black after X exitted; even though I am restoring
the state of the video card (or so I thought).

It turns out that if the driver sends a signal to DFP-1, then that
is a digital signal that is NOT converted to analogue by the
DVI->VGA adaptor. Apparently, a DVI plug uses different pins
for the digital and the analogue signals. The DVI->VGA adaptor
is nothing more than a stub to make the cable fit, passing on
the analogue signal.

The card however, can be in two modes: either it sends a digital
signal to the DVI plug, or it sends an analogue signal to the DVI
plug. THIS STATE IS NOT RESET WHEN X EXISTS (or so it seems).

So - if you are using a VGA cable, and a DVI->VGA adaptor to
connect your LCD to the DVI plug, then the reason you don't
see anything is because you tell the driver to treat it as DFP-1
instead of CRT-1.

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Old 12-10-06, 11:26 AM   #10
bluevoodoo1
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Default Re: Ubuntu + 7900 GS + 2nd Monitor

Yes I am using DVI cables with both monitors (no adaptors)...
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Old 12-10-06, 11:45 AM   #11
bluevoodoo1
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Default Re: Ubuntu + 7900 GS + 2nd Monitor

HEY!

that gave me an idea alaric. I swapped out the dvi cable on the troubling monitor for a vga cable and adaptor, and now i can see both monitors in nvidia-settings.... BUT the 2nd monitor is still blank, though windows are opening there...

I've attached another bug log...
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Views:	130
Size:	81.2 KB
ID:	22748  
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File Type: zip nvidia-bug-report-3.log.zip (29.9 KB, 88 views)

Last edited by bluevoodoo1; 12-10-06 at 12:10 PM.
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Old 12-10-06, 12:14 PM   #12
bluevoodoo1
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Exclamation Re: Ubuntu + 7900 GS + 2nd Monitor

In response to my last post...

I restarted, as i wanted to mess around in BIOS... and to my amazement.... BOTH screens displayed the startup/bios/and ubuntu startup!!! then I get to the login, and of course, the 2nd monitor turns off (loses signal)... Almost there...
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