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From "Joachim Lindenberg" <>
Subject AW: New user questions...
Date Tue, 27 Feb 2018 20:08:42 GMT
Hi Christian,

I did not change that setting. I just tried with the setting, but the situation did not really
improve, the rendering varies over time for no apparent video. If you like I can send you
a video to your personal email (roundabout 17MB). Or any other idea?

Thanks & Best Regards, Joachim


Von: Christian Kraus [] 
Gesendet: Dienstag, 27. Februar 2018 10:38
Betreff: AW: New user questions...


Hi Joachim,


Did you aktivate 


If set to "true", text will be rendered with smooth edges. Text over RDP is rendered with
rough edges by default, as this reduces the number of colors used by text, and thus reduces
the bandwidth required for the connection.

on your connections settings (it's in the performance section) under Guacmole Gui it is called
ClearType ?








-----Ursprüngliche Nachricht-----
Von: Joachim Lindenberg < <> >
Gesendet: Dienstag 27 Februar 2018 07:46
An: <> 
Betreff: AW: New user questions...

Hello  Mike,

thanks a lot for following up!

*       w.r.t. rendering issues. In the following picture I collected three screendumps:

First and second are taken from guacamole. It usually comes in initially with the second and
then later the first variant. When using mstsc I get the third – which is the most crips
one.. any suggestion?

*       w.r.t. ldap & database – my installation is very small w.r.t. the number of
users (2-3) and virtual systems (5-10).  A database sounds overengineered to me especially
considering operations (backup). Generating user-mapping.xml on the Hyper-V host sounds like
one approach I might try (but I dislike the passwords in that and would prefer to get them
from LDAP), or I am considering to plug in my own authentication – but that will take some
programming time. Actually I think Guacamole could standardize a rest based client using basic
authentication (forwarding the credentials received) and just expecting a list of connections
to display for that specific user. Then one would just have to configure a URL and implement
the server part.

*       Thanks for the tip with the clipboard! Got it to work!

Thanks & Best Regards,




Von: Mike Jumper [] 
Gesendet: Montag, 26. Februar 2018 22:09
An: <> 
Betreff: Re: New user questions...


On Mon, Feb 26, 2018 at 12:27 PM, Joachim Lindenberg < <>
> wrote:


I came across guacamole only last weekend and today decided to install and test. I have to
say I am blown away, great stuff!




However as with anything new, I also do have some issues and questions – I do hope I was
not too ignorant when looking for the answers in the documentation..

-          When exactly is user-mapping.xml read and are changes picked up? On every connection
attempt, on authenticating a use, or when?


The user-mapping.xml file is re-read when a user authenticates if it has been modified since
the last time it was read.


-          Can one authenticate against LDAP (actually active directory) but still use connections
defined in user-mapping.xml?


The user-mapping.xml cannot be used in this way, but the database authentication can:


You should look to migrating away from user-mapping.xml when you can regardless, as it's mainly
aimed at providing a quick way to confirm things are installed correctly. The database authentication
is much more full-featured.


-          The screen resolution for one of the sysems appeared to be slightly off. I am using
Chrome browser to guacamole, which connects to a real windows host (with physical display
4K set to 200% most of the time). Is there a means to fine tune this, maybe with the dpi setting?
What values to try? Connections to a Hyper-V host appeared to be fine


Can you describe specifically how the resolution is off?


-          I was not able to copy from or paste text into a “terminal” window. Is this
a configuration issue or a missing feature?


Neither - it is a browser limitation:


Guacamole already tries to synchronize the local clipboard, but whether this succeeds depends
on whether the browser allows such access. If the browser does not allow JavaScript to access
the local clipboard, you will either have to use an extension to override that behavior [1]
or use the clipboard editor provided within the Guacamole menu [2].


- Mike





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