Hi Nick,

Just to clarify in case my message wasn't clear - you do configure an rdp 
username and password on the system, and then you add that to guac 
username/password fields instead of $GUAC_USERNAME/$GUAC_PASSWORD... so when 
you select the host In guac, it does have to pass the username and password in, 
but now you're just starting at GDM on the host.  So they are using the RDP 
auth mechanism - just not the way that I'm used to it being used.   I wonder if 
anyone has managed to work around that, or whether that's possible.  It's a 
pity that RHEL10 did away with optional Xorg support.

Jason.

________________________________
From: Nick Couchman <[email protected]>
Sent: Friday, December 5, 2025 1:43 PM
To: [email protected] <[email protected]>
Subject: Re: guacamole on RHEL10 with RDP

On Fri, Dec 5, 2025 at 1:39 PM Jason Keltz <[email protected]> wrote:
>
> I can respond to a few of my own questions...
>
> I installed a RHEL10 system for testing, and discovered that I can enable 
> multi-user support with GNOME RDP, and users can use their regular username 
> and password to login.
>
> Disadvantages: 1) After logging into Guac, and selecting a host, the user 
> gets the GDM screen where they have to re-enter their username and password!  
> It doesn't look like you can pass in the username and password from guac as 
> I've always done with XRDP.  This is super unintuitive for users who have 
> just been logging into guac, and then clicking through to various hosts 
> without having to re-enter their username and password each time.   2) It 
> doesn't look like sound works.  3)  I had to use guac 1.6.0  on my test host, 
> guac 1.5.5 does not work (but I haven't been able to upgrade to 1.6.0 on my 
> main host due to a bug).   Not sure about performance yet.  Still would love 
> to hear from people with other solutions.
>

Jason,
Thanks for responding back with this information. Just a couple of
quick thoughts:
* Regarding credential pass-through, this might be something to ask on
the Gnome mailing list or forum, or perhaps ask Red Hat if you have a
support agreement with them, as I would expect this impacts RDP
clients other than Guacamole - that is, you probably can't run
xfreerdp or Microsoft Remote Desktop Client and access a RHEL10 system
running multi-user mode and expect credential pass-through to work
from those clients, either.
* Regarding the issue with Guacamole 1.5.5 not working with Gnome RDP
- my understanding is that Gnome RDP actually requires the GFX
Pipeline (formerly RemoteFX) to function properly, and that was only
implemented in Guacamole 1.6.0 as part of the reworking of the
rendering engine.

-Nick

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