Can't get DCV multiple monitors working

Question

Hello,

I have a g4dn.4xlarge running Ubuntu and DCV:

- Ubuntu 22.04.2 LTS

- DCV Viewer: 2022.2 (r5125)

- DCV server version 2022.2 (r14126) - 850b597893b7e9e1fa41688e06be0e9561708670

I'm trying to use multiple displays on my DCV client running on Mac OS Monterey. When I do View -> Fullscreen all Monitors, the DCV window seems to try to go to fullscreen on the monitor it's active on, then automatically exits fullscreen, but nothing happens on the other monitor.

DCV gives me this error:

> Exiting fullscreen mode: Server
and client monitor layout do not
match.
Server: [0,0 1776x984]
Client: [0,0 1440x900],
[1440, 106 1920x1080]

I saw this page:

https://www.ni-sp.com/support/nice-dcv-tips-and-tricks/#h-how-to-enable-multi-monitor-on-nvidia-gpus

And the section: How to enable multi-monitor on nVidia GPUs. I followed the instructions there but still can't get multiple displays working.

I'd be grateful for any guidance.

Thanks
Ean

Answer

I have a similar problem. Only 1 montior detected, i updated config from
https://www.ni-sp.com/support/nice-dcv-tips-and-tricks/#h-how-to-enable-multi-monitor-on-nvidia-gpus

but no change after reboot/reconnect

running this similar AMI to op.
https://aws.amazon.com/marketplace/pp/prodview-wz3puuyzkz6po
g5.xlarge

![Enter image description here](/media/postImages/original/IMK-vCyIqcTPqu6uxDXouHug)

Answer

Hey Ean, can you verify the [EC2 GRiD drivers](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/install-nvidia-driver.html#nvidia-driver-types) are installed? Note that Gaming drivers are limited to one monitor.

Answer

I'm having the same issue on an OSX 12.4. The Multiple display option won't show. 
Is there any way to fix this problem?

![Enter image description here](/media/postImages/original/IM5L2RTB5PSXafn3csPF6yIA)

Can't get DCV multiple monitors working

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