NICE DCV - Update freezes GUI on window resize

Question

I'll post a bug report, but posting it here for a heads-up. This happened recently to my Workspace, skylight did it's update:

Upgrade  nice-dcv-server-maxibon-2024.0.18564-1.el8.x86_64 @workspaces-rhel8-wsp
    Upgraded nice-dcv-server-maxibon-2024.0.17282-1.el8.x86_64 @@System
    Upgrade  nice-xdcv-2024.0.635-1.el8.x86_64                 @workspaces-rhel8-wsp
    Upgraded nice-xdcv-2024.0.587-1.el8.x86_64                 @@System
    Upgrade  nice-xdcv-console-2024.0.635-1.el8.x86_64         @workspaces-rhel8-wsp
    Upgraded nice-xdcv-console-2024.0.587-1.el8.x86_64         @@System
    Upgrade  wsp-dcv-host-adapter-2.1.0.1843-1.el8.x86_64      @workspaces-rhel8-wsp
    Upgraded wsp-dcv-host-adapter-2.1.0.1628-1.el8.x86_64      @@System

and the result is any window resizing instantly freezes the GUI and requires a Workspace restart. I recompiled my whole toolchain looking for a solution. I'm using another window manager, fvwm3.

To cure it I've done:

dnf --enablerepo workspaces-rhel8-wsp downgrade nice-dcv-server-maxibon-2024.0.17282-1.el8.x86_64
    dnf --enablerepo workspaces-rhel8-wsp downgrade nice-xdcv-2024.0.587-1.el8.x86_64
    dnf --enablerepo workspaces-rhel8-wsp downgrade nice-xdcv-console-2024.0.587-1.el8.x86_64
    dnf --enablerepo workspaces-rhel8-wsp downgrade wsp-dcv-host-adapter-2.1.0.1628-1.el8.x86_64
    
    yum install python3-dnf-plugin-versionlock
    yum --enablerepo workspaces-rhel8-wsp versionlock nice-dcv-server-maxibon-2024.0.17282-1.el8.x86_64
    yum --enablerepo workspaces-rhel8-wsp versionlock nice-xdcv-2024.0.587-1.el8.x86_64
    yum --enablerepo workspaces-rhel8-wsp versionlock nice-xdcv-console-2024.0.587-1.el8.x86_64
    yum --enablerepo workspaces-rhel8-wsp versionlock wsp-dcv-host-adapter-2.1.0.1628-1.el8.x86_64
`

Yoozer · Answer

So far the coders are saying "too bad, we're only coding to GNOME and we're abandoning X11 standards".
I'm escalating via our AWS account reps, and have also asked RedHat management if this might affect the RHEL Certification on our fleet.

The documentation at  https://docs.aws.amazon.com/dcv/latest/adminguide/setting-up-installing-linux-prereq.html says "There are several desktop environments, and Amazon DCV works with many of them" but this is no longer true.

re:Post Agent · Answer

Thank you for bringing this issue to our attention. It appears you've encountered a significant problem with the latest update to NICE DCV (Amazon DCV) on your Amazon WorkSpace. The GUI freezing upon window resizing is indeed a serious issue that can greatly impact usability.

Your workaround of downgrading to the previous versions of the DCV components and then using version locking to prevent future automatic updates is a good temporary solution. This approach should help maintain a stable working environment until the issue is resolved.

It's important to note that while this solves your immediate problem, it's not a long-term solution. By locking these versions, you may miss out on future security updates and feature improvements. Therefore, it's crucial to follow through with your plan to submit a bug report to AWS support.

When submitting the bug report, be sure to include:
1. The exact versions of the packages that caused the issue
2. The versions you've downgraded to
3. A detailed description of the problem, including any error messages
4. Your system specifications, including the WorkSpace type and the custom window manager you're using (fvwm3)

AWS actively supports and maintains Amazon DCV, so they should be responsive to this issue. In the meantime, continue to monitor for any announcements or updates regarding this problem.

For other users who might encounter similar issues, it's generally recommended to wait for official fixes rather than downgrading, especially in production environments. However, in cases where work is severely impacted, your approach of careful downgrading and version locking can be a viable temporary solution.  
**Sources**  
[What Is Amazon DCV? - Amazon DCV](https://docs.aws.amazon.com/dcv/latest/userguide/what-is-dcv.html)  
[Discontinuation of NICE EnginFrame effective September 25th, 2025 | AWS HPC Blog](https://aws.amazon.com/blogs/hpc/discontinuation-of-nice-enginframe-effective-september-25th-2025/)

NICE DCV - Update freezes GUI on window resize

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