Display order on boot...

[frozenwaffles]

so we have this annoying issue where the display order on reboot is backwards to how we would expect it to be and how it is when i used the reset command inthe display settings form the PB Menu...
does anyone know how to fix this or why it would be happening?
Card is NVIDIA M4000 running driver version 441.66.

this is the order of the screens after i 'reset' the outputs via the front panel or via the PB Menu:
(this is the order i want them in after a reboot. its also the order they are physically connected starting with the lowest connector as 1 from the M4000 GFX card)

IMG_20200329_172936.jpg

this is the order of the outputs straight after i boot/reboot the server:

IMG_20200329_172910.jpg

[Dave Thompson]

Hello Jeremy,

That is unfortunately that is a Windows and Nvidia issue.
In Between the reboot and the monitors coming up in different outputs did you re-patch anything?
The work around is to change the Output order in the Render Engine in the Config Tab.
You can also write the EDID into the Graphics card in the Nvidia System topology.
What Driver version do you have installed on the Server?

Cheers,
Dave

[frozenwaffles]

Hi Dave, no not repatching anything. the outputs are patched correctly as far as i know...that being output 1 from the bottom of the card up.

how does one 'write' the EDID to the card? the M4000 card is plugged into a lightware DVI matrix that is dishing out the EDIDs currently.

[justyn roy]

Hi Jeremy,

To "write" the EDID to the card, you need to open the NVIDIA Control panel.

This link has a great 'how-to' complete with screenshots.

I'll do this for just about every project now as this setting will fool Windows into thinking that there is a monitor plugged in - even if there is not!!

https://nvidia.custhelp.com/app/answers/detail/a_id/3569/~/managing-a-display-edid-on-windows

[frozenwaffles]

amazing! thanks Justyn
i will give this a go and report back...

[frozenwaffles]

yeah ok so this will work once all four screens are defaulting to the right order.... but that's still not happening?
the EDID does not say what order does it?
all four EDIDs are the same and all outputs have the same EDID file yes?

do you know what the default order is for the M4000? should display 1 be the lowest port or the highest port? lowest being the one closest to the bottom of the card, the bottom being the bit that plugs into the PCIE card slot...

i have a big feeling this is a windows 8 problem...

[Thomas Mrozek]

Hello everyone.

The best way to work with this behavior is to understand how it works. The NVidia driver will, after turning on the system, check the output connections and settings. Then, windows will recognize the detected ones in a timely order. After the next reboot, if nothing changed at all (all cables still in place, all displays turned on), the order will stay the same. If there are any changes, resolution settings, cable connection, or display turned off, the reordering process will start again.

To avoid the issue, the trick is to not change something. Make sure, every display is up and running before turning on the output system. If setup changes are not avoidable, Pandoras Box Output Management is the fastest and most reliable way the sort that out.

The mosaic mode in Quadro cards also helps to avoid this issue as it links output ports to screen areas directly.

I hope this helps,
cheers
Thomas

[frozenwaffles]

Thankyou Thomas.