Nouveau - Sep 2015 - nvs280 / nv34 card only does 1680x1050, not 1920x1080 ?

Hi All,

I've recently acquired a nvs280 card, which is a nv34
gpu based card with a pci-e bridge on the card, this
way I can test nv3x problems without needing an agp
motherboard.

One thing which stands out with this card is that
it drivers my dvi lcd monitor at 1680x1050 instead of its
native 1920x1080.

Is this due to a known limitation on the display pipeline
of these cards / nv34 gpu-s. Or is this more likely a bug
somewhere ?

Regards,

Hans

Tmds is limited to 135mhz on nv3x. If you use analog, you can get full
resolution.
On Sep 4, 2015 9:00 AM, "Hans de Goede" <hdegoede at redhat.com>
wrote:
> Hi All,
>
> I've recently acquired a nvs280 card, which is a nv34
> gpu based card with a pci-e bridge on the card, this
> way I can test nv3x problems without needing an agp
> motherboard.
>
> One thing which stands out with this card is that
> it drivers my dvi lcd monitor at 1680x1050 instead of its
> native 1920x1080.
>
> Is this due to a known limitation on the display pipeline
> of these cards / nv34 gpu-s. Or is this more likely a bug
> somewhere ?
>
> Regards,
>
> Hans
> _______________________________________________
> Nouveau mailing list
> Nouveau at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/nouveau
>
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On 04.09.2015 16:56, Ilia Mirkin wrote:
> Tmds is limited to 135mhz on nv3x. If you use analog, you can get full
> resolution.
> On Sep 4, 2015 9:00 AM, "Hans de Goede" <hdegoede at
redhat.com> wrote:
> 
>> Hi All,
>>
>> I've recently acquired a nvs280 card, which is a nv34
>> gpu based card with a pci-e bridge on the card, this
>> way I can test nv3x problems without needing an agp
>> motherboard.
>>
>> One thing which stands out with this card is that
>> it drivers my dvi lcd monitor at 1680x1050 instead of its
>> native 1920x1080.
>>
>> Is this due to a known limitation on the display pipeline
>> of these cards / nv34 gpu-s. Or is this more likely a bug
>> somewhere ?
>>
>> Regards,
>>
>> Hans
>>
man 1 cvt
"Create a mode with reduced blanking. ..."

Enough to fit,
GeForce FX 5200 −DVI− LCD FullHD

xrandr --newmode "1920x1080R" 138.50 1920 1968 2000 2080 1080 1083
1088 1111 +hsync -vsync
xrandr --addmode <output name> 1920x1080R
xrandr --output <output name> --mode 1920x1080R