Re: [X2Go-User] Can't start a plasma session

[Stefan Baur]

Am 13.06.20 um 10:59 schrieb Mihai Dobrescu:
> Hello, my x2go, provided by Sabayon Linux, can't start a KDE session
> because there is no more startkde command, I guess now it must run
> startplasma-wayland or startplasma-x11.
> Is there a version that implements that? Which one?

You could try "Session type: Custom Desktop" and specify startplasma-x11
as the command to be run on the server.

-Stefan


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[X2Go-User] Can't start a plasma session

[Mihai Dobrescu]

Hello, my x2go, provided by Sabayon Linux, can't start a KDE session
because there is no more startkde command, I guess now it must run
startplasma-wayland or startplasma-x11.
Is there a version that implements that? Which one?

Regards,
Mihai Sorin Dobrescu
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Re: [X2Go-User] X2go session broker configuration question

[Simon Gao]

 For x2gobroker session server:  

OS: CentOS 8.1

Installed packages:
x2gobroker-0.0.4.3-0.0x2go1.1.git20200426.1239.main.el8.x86_64
x2gobroker-loadchecker-0.0.4.3-0.0x2go1.1.git20200426.1239.main.el8.x86_64
x2gobroker-authservice-0.0.4.3-0.0x2go1.1.git20200426.1239.main.el8.x86_64
python3-x2gobroker-0.0.4.3-0.0x2go1.1.git20200426.1239.main.el8.x86_64
x2gobroker-wsgi-0.0.4.3-0.0x2go1.1.git20200426.1239.main.el8.x86_64
x2gobroker-daemon-0.0.4.3-0.0x2go1.1.git20200426.1239.main.el8.x86_64


For x2go server:
OS: CentOS 8.1
Installed packages:
x2goserver-4.1.0.3-5.el8.x86_64
x2gobroker-agent-0.0.4.3-0.0x2go1.1.git20200426.1239.main.el8.x86_64
x2goserver-common-4.1.0.3-5.el8.noarch
x2goserver-xsession-4.1.0.3-5.el8.noarch
x2goagent-4.1.0.3-5.el8.x86_64
x2goclient-4.1.2.2-1.el8.x86_64

Simon



On Thursday, June 18, 2020, 1:45:26 AM PDT, Mike Gabriel 
 wrote:  
 
 Hi,

On  Di 09 Jun 2020 19:54:11 CEST, Simon Gao wrote:

> Hi All,
> I'm trying to set up x2go session broker and following this instruction at
>
> wiki:advanced:x2gobroker:loadbalancing [X2Go - everywhere@home].
>
> |
> |
> |
> |  |  |
>
>  |
>
>  |
> |
> |  |
> wiki:advanced:x2gobroker:loadbalancing [X2Go - everywhere@home]
>
>
>  |
>
>  |
>
>  |
>
> I'm running into an issue with:sudo x2gobroker-pubkeyauthorizer  
> --broker-url http(s)://://pubkeys/
> What files should I put in /pubkeys/ directory?  When I put in one  
> pub key for the session broker, I received following error:
>
> 2020-06-09 10:52:39,836 - broker - INFO - Authorizing access to this  
> X2Go server for X2Go Session Broker
> 2020-06-09 10:52:39,836 - broker - INFO - at URL  
> https://x2gobroker.example.com/pubkeys/x2gobrokerpubkey.pub
> 2020-06-09 10:52:39,866 - broker - INFO -   Found 1 public key at  
> URL https://x2gobroker.example.com/pubkeys/x2gobrokerpubkey.pub
> Traceback (most recent call last):
>   File "/usr/sbin/x2gobroker-pubkeyauthorizer", line 206, in 
>     keytype, pubkey, owner = new_pubkey.rsplit(" ", 2)
> ValueError: not enough values to unpack (expected 3, got 2)
>
> Any help is appreciated.
> Simon

What version of x2gobroker on what distro are you using???

Greets,
Mike
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Re: [X2Go-User] keyboard config on wayland

[Neal Becker]

On Thu, Jun 18, 2020 at 12:02 PM Ulrich Sibiller  wrote:

> On Thu, Jun 18, 2020 at 4:05 PM Neal Becker  wrote:
> >> Please try to upgrade nx to 3.5.99.24
> >
> > Don't know how I'd do that.  Fedora 32 has 3.5.99.22, and even rawhide
> has the same.
> >  http://packages.x2go.org/fedora/30/main/x86_64/rpms/nx-libs/ has what
> seems the same version.
>
> Check this site: https://bodhi.fedoraproject.org/updates/?packages=nx-libs


Thanks for the tip, but there's no 3.5.99.24 there.  Should I file a bug
report asking Orion to update the Fedora package?
Is it just nx-libs that needs an update?


>
>
> >> > Actually it's worse (and weirder) than I thought.  If x2go client is
> running, cut/paste doesn't work anywhere on my client side, not only within
> x2go client.  I just tried
> >> > cut/paste between tabs in chrome on my client (not within x2go) and
> nothing happens.  I then shutdown the x2go session on the client, and tried
> the experiment again,
> >> > and now I can cut/paste between tabs on chrome.
> >>
> >> I have seen slow (but working!) clipboard with chrome, too (and
> >> without any wayland being involved). So this might be a chrome issue.
> >> Please also check if you have some kind of clipboard manager running.
> >>
> > kde has some clipboard manager, doesn't seem to run as a separate
> process though (don't see it in ps).
>
> Yes, that's crap by KDE... You can disable that by fiddling with some
> config file but it tends to come back with updates.. However, as a
> test please use some other desktop and check if clipboard is working
> better there.
>
> Uli
>


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Re: [X2Go-User] keyboard config on wayland

[Ulrich Sibiller]

On Thu, Jun 18, 2020 at 4:05 PM Neal Becker  wrote:
>> Please try to upgrade nx to 3.5.99.24
>
> Don't know how I'd do that.  Fedora 32 has 3.5.99.22, and even rawhide has 
> the same.
>  http://packages.x2go.org/fedora/30/main/x86_64/rpms/nx-libs/ has what seems 
> the same version.

Check this site: https://bodhi.fedoraproject.org/updates/?packages=nx-libs

>> > Actually it's worse (and weirder) than I thought.  If x2go client is 
>> > running, cut/paste doesn't work anywhere on my client side, not only 
>> > within x2go client.  I just tried
>> > cut/paste between tabs in chrome on my client (not within x2go) and 
>> > nothing happens.  I then shutdown the x2go session on the client, and 
>> > tried the experiment again,
>> > and now I can cut/paste between tabs on chrome.
>>
>> I have seen slow (but working!) clipboard with chrome, too (and
>> without any wayland being involved). So this might be a chrome issue.
>> Please also check if you have some kind of clipboard manager running.
>>
> kde has some clipboard manager, doesn't seem to run as a separate process 
> though (don't see it in ps).

Yes, that's crap by KDE... You can disable that by fiddling with some
config file but it tends to come back with updates.. However, as a
test please use some other desktop and check if clipboard is working
better there.

Uli
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Re: [X2Go-User] keyboard config on wayland

[Neal Becker]

On Thu, Jun 18, 2020 at 9:57 AM Ulrich Sibiller  wrote:

> On Thu, Jun 18, 2020 at 3:49 PM Neal Becker  wrote:
>
> Please try to upgrade nx to 3.5.99.24
>

Don't know how I'd do that.  Fedora 32 has 3.5.99.22, and even rawhide has
the same.
 http://packages.x2go.org/fedora/30/main/x86_64/rpms/nx-libs/ has what
seems the same version.


> > Actually it's worse (and weirder) than I thought.  If x2go client is
> running, cut/paste doesn't work anywhere on my client side, not only within
> x2go client.  I just tried
> > cut/paste between tabs in chrome on my client (not within x2go) and
> nothing happens.  I then shutdown the x2go session on the client, and tried
> the experiment again,
> > and now I can cut/paste between tabs on chrome.
>
> I have seen slow (but working!) clipboard with chrome, too (and
> without any wayland being involved). So this might be a chrome issue.
> Please also check if you have some kind of clipboard manager running.
>
> Uli
>

kde has some clipboard manager, doesn't seem to run as a separate process
though (don't see it in ps).
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Re: [X2Go-User] keyboard config on wayland

[Ulrich Sibiller]

On Thu, Jun 18, 2020 at 3:49 PM Neal Becker  wrote:

Please try to upgrade nx to 3.5.99.24

> Actually it's worse (and weirder) than I thought.  If x2go client is running, 
> cut/paste doesn't work anywhere on my client side, not only within x2go 
> client.  I just tried
> cut/paste between tabs in chrome on my client (not within x2go) and nothing 
> happens.  I then shutdown the x2go session on the client, and tried the 
> experiment again,
> and now I can cut/paste between tabs on chrome.

I have seen slow (but working!) clipboard with chrome, too (and
without any wayland being involved). So this might be a chrome issue.
Please also check if you have some kind of clipboard manager running.

Uli
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Re: [X2Go-User] keyboard config on wayland

[Neal Becker]

On Thu, Jun 18, 2020 at 9:34 AM Neal Becker  wrote:

> server has nxagent-3.5.99.22-1.fc31.x86_64
>
> On Thu, Jun 18, 2020 at 9:19 AM Ulrich Sibiller  wrote:
>
>> On Thu, Jun 18, 2020 at 2:59 PM Neal Becker  wrote:
>> >
>> > Both client and server are Fedora (31 and 32).
>> >
>> > I'm running a kde/wayland client, with capslock mapped to ctrl.
>>
>> Well, for me wayland is absolutely untested. So it might work. Or not.
>>
>> > When I connect to the server (running mate) everything works fine,
>> except I don't have capslock mapped to ctrl.
>> > Every time I connect (not every time the session starts) I have to run
>> > setxkbmap -option caps:ctrl_modifier
>> >
>> > Oh actually one thing doesn't work.  Cut/paste is totally nonfunctional.
>>
>> Both sound like you are using an old version of nxagent. What version
>> do you have?
>>
>> Uli
>>
>
>
> --
> *Those who don't understand recursion are doomed to repeat it*
>

Actually it's worse (and weirder) than I thought.  If x2go client is
running, cut/paste doesn't work anywhere on my client side, not only within
x2go client.  I just tried
cut/paste between tabs in chrome on my client (not within x2go) and nothing
happens.  I then shutdown the x2go session on the client, and tried the
experiment again,
and now I can cut/paste between tabs on chrome.
-- 
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Re: [X2Go-User] keyboard config on wayland

[Neal Becker]

server has nxagent-3.5.99.22-1.fc31.x86_64

On Thu, Jun 18, 2020 at 9:19 AM Ulrich Sibiller  wrote:

> On Thu, Jun 18, 2020 at 2:59 PM Neal Becker  wrote:
> >
> > Both client and server are Fedora (31 and 32).
> >
> > I'm running a kde/wayland client, with capslock mapped to ctrl.
>
> Well, for me wayland is absolutely untested. So it might work. Or not.
>
> > When I connect to the server (running mate) everything works fine,
> except I don't have capslock mapped to ctrl.
> > Every time I connect (not every time the session starts) I have to run
> > setxkbmap -option caps:ctrl_modifier
> >
> > Oh actually one thing doesn't work.  Cut/paste is totally nonfunctional.
>
> Both sound like you are using an old version of nxagent. What version
> do you have?
>
> Uli
>


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Re: [X2Go-User] keyboard config on wayland

[Ulrich Sibiller]

On Thu, Jun 18, 2020 at 2:59 PM Neal Becker  wrote:
>
> Both client and server are Fedora (31 and 32).
>
> I'm running a kde/wayland client, with capslock mapped to ctrl.

Well, for me wayland is absolutely untested. So it might work. Or not.

> When I connect to the server (running mate) everything works fine, except I 
> don't have capslock mapped to ctrl.
> Every time I connect (not every time the session starts) I have to run
> setxkbmap -option caps:ctrl_modifier
>
> Oh actually one thing doesn't work.  Cut/paste is totally nonfunctional.

Both sound like you are using an old version of nxagent. What version
do you have?

Uli
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Re: [X2Go-User] Matlab graphics performance when running in x2go

[Johannes Töger]

No flicker. It works well but crashes.

- Johannes Töger


From: Aki Ketolainen 
Sent: Thursday, June 18, 2020 2:03:22 PM
To: Johannes Töger 
Cc: x2go-user@lists.x2go.org 
Subject: Re: [X2Go-User] Matlab graphics performance when running in x2go


Hi Johannes,

I meant to ask whether Matlab flickers for you when you set the newer Mesa 
libgl-xlib version in the x2go session.

Best regards,

Aki


On 2020-06-18 14:53, Johannes Töger wrote:

No, I haven't tried these. Let me know if you learn something interesting.

—

Johannes Töger



Associate Senior Lecturer

Cardiac MR Group

Department of Clinical Sciences Lund, Clinical Physiology

Lund University, Sweden



From: Aki Ketolainen 
Sent: Thursday, June 18, 2020 13:17
To: Johannes Töger 
Cc: x2go-user@lists.x2go.org
Subject: Re: [X2Go-User] Matlab graphics performance when running in x2go



On 2020-06-02 21:56, Johannes Töger wrote:

> I finally figured it out! Now I can run Matlab R2019b on Ubuntu 18.04 LTS 
> with decent graphics performance over x2go,
> even with transparency using the Mesa llvmpipe software OpenGL driver.

Hi Johannes,

When I do the LD_LIBRARY_PATH switcheroo for Mesa libgl-xlib, the OpenGL 
program Kivy and the test program glxgears
start flickering quite much. Kivy doesn't even work with the default x2go 
OpenGL version.
Do you experience this and would you have advice on how to get rid of it? The 
programs still work ok and don't crash.

I'm running x2go server in a Docker container on CentOS 7.

Best regards,

Aki



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[X2Go-User] keyboard config on wayland

[Neal Becker]

Both client and server are Fedora (31 and 32).

I'm running a kde/wayland client, with capslock mapped to ctrl.
When I connect to the server (running mate) everything works fine, except I
don't have capslock mapped to ctrl.
Every time I connect (not every time the session starts) I have to run
setxkbmap -option caps:ctrl_modifier

Oh actually one thing doesn't work.  Cut/paste is totally nonfunctional.

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Re: [X2Go-User] X2go session broker configuration question

[Mike Gabriel]

Hi,

On  Di 09 Jun 2020 19:54:11 CEST, Simon Gao wrote:


Hi All,
I'm trying to set up x2go session broker and following this instruction at

wiki:advanced:x2gobroker:loadbalancing [X2Go - everywhere@home].

|
|
|
|  |  |

 |

 |
|
|  |
wiki:advanced:x2gobroker:loadbalancing [X2Go - everywhere@home]


 |

 |

 |

I'm running into an issue with:sudo x2gobroker-pubkeyauthorizer  
--broker-url http(s)://://pubkeys/
What files should I put in /pubkeys/ directory?  When I put in one  
pub key for the session broker, I received following error:


2020-06-09 10:52:39,836 - broker - INFO - Authorizing access to this  
X2Go server for X2Go Session Broker
2020-06-09 10:52:39,836 - broker - INFO - at URL  
https://x2gobroker.example.com/pubkeys/x2gobrokerpubkey.pub
2020-06-09 10:52:39,866 - broker - INFO -   Found 1 public key at  
URL https://x2gobroker.example.com/pubkeys/x2gobrokerpubkey.pub

Traceback (most recent call last):
  File "/usr/sbin/x2gobroker-pubkeyauthorizer", line 206, in 
    keytype, pubkey, owner = new_pubkey.rsplit(" ", 2)
ValueError: not enough values to unpack (expected 3, got 2)

Any help is appreciated.
Simon


What version of x2gobroker on what distro are you using???

Greets,
Mike
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Re: [X2Go-User] Matlab graphics performance when running in x2go

[Aki Ketolainen]

Hi Johannes, 


I meant to ask whether Matlab flickers for you when you set the newer
Mesa libgl-xlib version in the x2go session. 

Best regards, 

Aki 


On 2020-06-18 14:53, Johannes Töger wrote:


No, I haven't tried these. Let me know if you learn something interesting.

--  

Johannes Töger 

Associate Senior Lecturer 

Cardiac MR Group 

Department of Clinical Sciences Lund, Clinical Physiology 

Lund University, Sweden 

From: Aki Ketolainen  
Sent: Thursday, June 18, 2020 13:17

To: Johannes Töger 
Cc: x2go-user@lists.x2go.org
Subject: Re: [X2Go-User] Matlab graphics performance when running in x2go 

On 2020-06-02 21:56, Johannes Töger wrote: 

I finally figured it out! Now I can run Matlab R2019b on Ubuntu 18.04 LTS with decent graphics performance over x2go, 
even with transparency using the Mesa llvmpipe software OpenGL driver. 


Hi Johannes, 


When I do the LD_LIBRARY_PATH switcheroo for Mesa libgl-xlib, the OpenGL 
program Kivy and the test program glxgears
start flickering quite much. Kivy doesn't even work with the default x2go 
OpenGL version.
Do you experience this and would you have advice on how to get rid of it? The programs still work ok and don't crash. 

I'm running x2go server in a Docker container on CentOS 7. 

Best regards, 

Aki 


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Re: [X2Go-User] Matlab graphics performance when running in x2go

[Johannes Töger]

No, I haven’t tried these. Let me know if you learn something interesting.

—
Johannes Töger

Associate Senior Lecturer
Cardiac MR Group
Department of Clinical Sciences Lund, Clinical Physiology
Lund University, Sweden

From: Aki Ketolainen 
Sent: Thursday, June 18, 2020 13:17
To: Johannes Töger 
Cc: x2go-user@lists.x2go.org
Subject: Re: [X2Go-User] Matlab graphics performance when running in x2go


On 2020-06-02 21:56, Johannes Töger wrote:

> I finally figured it out! Now I can run Matlab R2019b on Ubuntu 18.04 LTS 
> with decent graphics performance over x2go,
> even with transparency using the Mesa llvmpipe software OpenGL driver.

Hi Johannes,

When I do the LD_LIBRARY_PATH switcheroo for Mesa libgl-xlib, the OpenGL 
program Kivy and the test program glxgears
start flickering quite much. Kivy doesn't even work with the default x2go 
OpenGL version.
Do you experience this and would you have advice on how to get rid of it? The 
programs still work ok and don't crash.

I'm running x2go server in a Docker container on CentOS 7.

Best regards,

Aki


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Re: [X2Go-User] Matlab graphics performance when running in x2go

[Aki Ketolainen]

On 2020-06-02 21:56, Johannes Töger wrote: 

I finally figured it out! Now I can run Matlab R2019b on Ubuntu 18.04 LTS with decent graphics performance over x2go, 
even with transparency using the Mesa llvmpipe software OpenGL driver. 


Hi Johannes, 


When I do the LD_LIBRARY_PATH switcheroo for Mesa libgl-xlib, the OpenGL
program Kivy and the test program glxgears
start flickering quite much. Kivy doesn't even work with the default
x2go OpenGL version.
Do you experience this and would you have advice on how to get rid of
it? The programs still work ok and don't crash. 

I'm running x2go server in a Docker container on CentOS 7. 

Best regards, 


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Re: [X2Go-User] Problems using HTML5 kvm console

[Ulrich Sibiller]

On Thu, Jun 18, 2020 at 10:52 AM Simon Beißer  wrote:
>
> > So then the browser's translation is the culprit.
>
> I'm not sure about it. The browser implements the standard as it is
> defined
> (https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/code) as
> you can see with the help of this website:
> https://w3c.github.io/uievents/tools/key-event-viewer.html
>
> > So when you do that what is the keyboard configuration in X (setxkbmap
> -query)?
>
> The local X runs with the following default settings
>
> rules:  evdev
> model:  pc105
> layout: de
> variant:nodeadkeys
>
> I have also tried these settings via x2go. Unfortunately, the key code
> is still interpreted as "NumpadEnter" and is therefore passed on to the
> KVM console.

As I wrote, let x2go do the keyboard stuff and so not set an own one.
Internally there's is some magic happening which converts some
keycodes in certain circumstances. Ensure that setxkbmap -query
outputs the same locally and in the session.

Please also check if there's any hint about keycode conversion in the
log of the session (~/.x2go/.../session.log), one of these messages
Info: Keycode conversion is on
Info: Keycode conversion is off
Info: Keycode conversion auto-determined as on
Info: Keycode conversion auto-determined as off

It should be off in your case.

> > Argh!! xfree86 is long gone and dead. I wouldn't place any bets on
> > that. Please configure automatic keyboard detection!
>
> Okay. But it seems still the default in "/etc/x2go/x2goagent.keyboard".

Reading that file has been dropped from nx in February of 2017
(3.5.99.17). If x2go still delivers that it is a bug!

Uli
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[X2Go-User] SSH compression

[Simon Reiter]

Hi,

I already read a few information about the compression used in x2go at 
https://github.com/ArcticaProject/nx-libs/issues/802.


My naive assumption would be that using the compression in x2go makes any 
compression in the SSH config obsolete, because the compression is only a 
general one and the one in x2go should suite better for what to be transmitted.

Since x2go reads my SSH config, I am now wondering, if the “Compression” option 
in the config file is ignored when establishing the connection or not. On my 
current setup, the x2go server requires a ProxyJump, which I set up in the x2go 
session settings. Does it provide better performance to do it like this or 
rather open manually a SSH connection to the target host with some local 
forwarding? And also here with or without compression?


I am very happy for some recommendations.

Best regards,
Simon Reiter


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Re: [X2Go-User] Problems using HTML5 kvm console

[Simon Beißer]

> So then the browser's translation is the culprit.

I'm not sure about it. The browser implements the standard as it is
defined
(https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/code) as
you can see with the help of this website:
https://w3c.github.io/uievents/tools/key-event-viewer.html

> So when you do that what is the keyboard configuration in X (setxkbmap
-query)?

The local X runs with the following default settings

rules:  evdev
model:  pc105
layout: de
variant:nodeadkeys

I have also tried these settings via x2go. Unfortunately, the key code
is still interpreted as "NumpadEnter" and is therefore passed on to the
KVM console.

> Argh!! xfree86 is long gone and dead. I wouldn't place any bets on
> that. Please configure automatic keyboard detection!

Okay. But it seems still the default in "/etc/x2go/x2goagent.keyboard".

Best regards
Simon


Am 17.06.2020 um 13:57 schrieb Ulrich Sibiller:
> On Wed, Jun 17, 2020 at 1:28 PM Simon Beißer  
> wrote:
>>> You can verify that assumption by running xev inside the x2go session.
>>> If you see correct events, keysyms and keycodes, then the browser gets
>>> something wrong.
>>
>> I have tested with xev before and could not find any direct problems.
>> Also within the browser all keys work correctly.
> 
> So then the browser's translation is the culprit.
> 
>> Only in the KVM console the assignment is wrong. It must somehow be in
>> interaction with x2go/nx. I have tried it locally when I log in directly
>> to the X - everything works there.
> 
> So when you do that what is the keyboard configuration in X (setxkbmap 
> -query)?
> 
>> My guess is that the physical key assignment via nx is not correct.
>> With virtual consoles, such as the KVM client, this so-called keycode
>> (KeyboardEvent.code) is probably used. You can then select the actual
>> keyboard layout within the KVM console.
>> Thus the consoles are independent of the keyboard layout selected on the
>> system because they access "KeyboardEvent.code" directly, i.e. the
>> physically transmitted key.
>>
>> You can also read about it here:
>> https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/code
>>
>> Here you can check which KeyboardEvent.code was pressed:
>> https://w3c.github.io/uievents/tools/key-event-viewer.html
>>
>> Using x2go, some keys show wrong values there, e.g. all arrow keys
>> (except arrow up).
>>
>> Can you reproduce this?
> 
> Cannot try right now.
> 
>>> If the session you are starting via x2go happens to be a kde session
>>
>> We are using xfce.
>>
>>> What keyboard setting is your x2go session using?
>>
>> We are using xfree86 as keyboard configuration with pc105 de layout.
> 
> Argh!! xfree86 is long gone and dead. I wouldn't place any bets on
> that. Please configure automatic keyboard detection!
> 
> Uli
> 



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