x11/nvidia-driver cannot obtain EDID under 8.0-BETA3/i386

[Eugene Grosbein]

Hi!

Fresh install of 8.0-BETA2 upgraded to 8.0-BETA3 using source,
x.org installed from fresh ports tree. It cannot read EDID from
Samsung 959NF CRT monitor. The same time, it can read EDID under 7.2-STABLE
just fine. I've tried older nvidia-driver-180.60 (downgrading port)
and current port's version 185.18.29, no change.

(WW) NVIDIA(GPU-0): Unable to read EDID for display device CRT-1
(II) NVIDIA(0): NVIDIA GPU GeForce 7600 GS (G73) at PCI:1:0:0 (GPU-0)
(--) NVIDIA(0): Memory: 262144 kBytes
(--) NVIDIA(0): VideoBIOS: 05.73.22.16.02
(II) NVIDIA(0): Detected PCI Express Link width: 16X
(--) NVIDIA(0): Interlaced video modes are supported on this GPU
(--) NVIDIA(0): Connected display device(s) on GeForce 7600 GS at PCI:1:0:0:
(--) NVIDIA(0):     CRT-1
(--) NVIDIA(0): CRT-1: 400.0 MHz maximum pixel clock
(II) NVIDIA(0): Assigned Display Device: CRT-1
(==) NVIDIA(0):
(==) NVIDIA(0): No modes were requested; the default mode "nvidia-auto-select"
(==) NVIDIA(0):     will be used as the requested mode.

Please direct me there to dig.

Eugene Grosbein
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[Mel-16]

On Friday 28 August 2009 15:50:30 Eugene Grosbein wrote:
> Hi!
>
> Fresh install of 8.0-BETA2 upgraded to 8.0-BETA3 using source,
> x.org installed from fresh ports tree. It cannot read EDID from
> Samsung 959NF CRT monitor. The same time, it can read EDID under 7.2-STABLE
> just fine. I've tried older nvidia-driver-180.60 (downgrading port)
> and current port's version 185.18.29, no change.
>
> (WW) NVIDIA(GPU-0): Unable to read EDID for display device CRT-1

Can't reproduce this with FreeBSD 8.0-BETA2 #10 r196398M both 180.60 and
185.18.29 driver. World/kernel as of today is building, so I'll report back if
I can reproduce it then.
Different (laptop) monitor though.
--
Mel
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[Eugene Grosbein-7]

Mel Flynn wrote:

>> Fresh install of 8.0-BETA2 upgraded to 8.0-BETA3 using source,
>> x.org installed from fresh ports tree. It cannot read EDID from
>> Samsung 959NF CRT monitor. The same time, it can read EDID under 7.2-STABLE
>> just fine. I've tried older nvidia-driver-180.60 (downgrading port)
>> and current port's version 185.18.29, no change.
>>
>> (WW) NVIDIA(GPU-0): Unable to read EDID for display device CRT-1

Just for archives: Samsung 959NF has two inputs, D-Sub and BNC.
For D-Sub, it presents EDID and it does not for BNC that I used.
So, the problem was with monitor connection, not with FreeBSD nor nvidia-driver.

Eugene Grosbein

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[Torfinn Ingolfsen]

On Thu, 05 Nov 2009 13:06:55 +0700
Eugene Grosbein <egrosbein@...> wrote:

> Just for archives: Samsung 959NF has two inputs, D-Sub and BNC.
> For D-Sub, it presents EDID and it does not for BNC that I used.
> So, the problem was with monitor connection, not with FreeBSD nor
> nvidia-driver.

Figures. EDID[1] uses DDC2B[2] which is an I2C bus, implemented on two
specific pins of the VGA[3] connector, or the DVI[4] connector.

References:
1) http://en.wikipedia.org/wiki/EDID
2) http://en.wikipedia.org/wiki/Display_Data_Channel#DDC2B
3) http://en.wikipedia.org/wiki/VGA_connector
4) http://en.wikipedia.org/wiki/Digital_Visual_Interface

HTH
--
Regards,
Torfinn Ingolfsen

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