Problem with external VGA

[Miner, Jonathan W (US SSA)]

FYI... I've filed this as "Bug 958415"

https://bugzilla.redhat.com/show_bug.cgi?id=958415

________________________________________
From: Miner, Jonathan W (US SSA)
Sent: Monday, April 29, 2013 14:39
To: Community support for Fedora users
Subject: RE: Problem with external VGA

________________________________________
From: John Pilkington [J.Pilk at tesco.net]
Sent: Monday, April 29, 2013 08:16
To: users at lists.fedoraproject.org
Subject: Re: Problem with external VGA

On 29/04/13 12:48, Miner, Jonathan W (US SSA) wrote:
> I've got a Dell Precision M4600 laptop, running Fedora 17.  Sometime
> after kernel 3.7.9-104, the external VGA output no longer works.
>
> If I boot with 3.7.9-104,with my projector attached, it is recognized.
> If I boot with 3.8.4-102, external VGA devices are not recognized.
>
> lspci:
> 01:00.0 VGA compatible controller: nVidia Corporation GF108 [Quadro
> 1000M] (rev a1)
>
> (I've tried running the driver from nVidia, but that has screen
> rendering problems, with blocks of random data instead of my normal
> background pic)
>
> - Jon
>
>
/var/log/Xorg.0.log ought to show what's happening.  Or 0 ... to 9.

'the driver from nvidia'?  Which one? but perhaps you want to run nouveau?

------

The Xorg logs from the 3.7.9-104 kernel clearly show that the VGA is detected:
[    48.288] (II) NOUVEAU(0): Printing probed modes for output VGA-1
[    48.288] (II) NOUVEAU(0): Output VGA-1 connected

The Xorg logs from the 3.8.3-103 (and newer 3.8.4-102) kernels, show the driver believes the VGA is not connected:
[    46.357] (II) NOUVEAU(0): Output VGA-1 disconnected

Starting to look like the driver was changed between 3.7  and 3.8 kernels?

- Jon