Xen users - Sep 2012 - Bugs in VNC viewer ? Mouse offset and keyboard map incorrect

Hello.

Am I the only one to have problem with the VNC server that is included in
Xen? Ihave tried with several VNC client, and every time

* the mouse cursor is offset from the host system cursor;

* the keys on the keyboard give characters that don''t match (for
example,
typing '';'' on my keyboard gives an ''m'' on
the guest''s screen...)

Thanks.

-- 
Fabrice DELENTE


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Quoting Fabrice Delente''s message from 10 sep
2012:
>Hello.
>
>Am I the only one to have problem with the VNC server that is included
>in Xen? Ihave tried with several VNC client, and every time
>
>* the mouse cursor is offset from the host system cursor;
Yeah, that''s pretty common in my experience. It''s because the
client
uses its own cursor acceleration. 
>
>* the keys on the keyboard give characters that don''t match (for
>example, typing '';'' on my keyboard gives an
''m'' on the guest''s
>screen...)
Probably an issue between different keymaps on the VNC client and
server. Maybe you can set a keymap on your vnc client? I use remmina
as a vnc client (wrapper), and am able to choose different clients. I
use the dvorak layout, so I have set my VNC client to dvorak as well.
But on the guest VM I still have to set it to the US layout.
Probably because the client sends key codes, not characters, to the
VNC server.

-- 
HTH,
Mark van Dijk.                ,---------------------------------
-----------------------------''         Mon Sep 10 20:22 UTC 2012
Today is Pungenday, the 34th day of Bureaucracy in the YOLD 3178

On Mon, 2012-09-10 at 21:22 +0100, Mark van Dijk wrote:
> Quoting Fabrice Delente''s message from 10 sep 2012:
> >Hello.
> >
> >Am I the only one to have problem with the VNC server that is included
> >in Xen? Ihave tried with several VNC client, and every time
> >
> >* the mouse cursor is offset from the host system cursor;
> 
> Yeah, that''s pretty common in my experience. It''s because
the client
> uses its own cursor acceleration. 
Using usbdevice="tablet" in your guest config fixes this by using an
absolute device type.
> >* the keys on the keyboard give characters that don''t match
(for
> >example, typing '';'' on my keyboard gives an
''m'' on the guest''s
> >screen...)
> 
> Probably an issue between different keymaps on the VNC client and
> server. Maybe you can set a keymap on your vnc client? I use remmina
> as a vnc client (wrapper), and am able to choose different clients. I
> use the dvorak layout, so I have set my VNC client to dvorak as well.
> But on the guest VM I still have to set it to the US layout.
> Probably because the client sends key codes, not characters, to the
> VNC server.
You can also use keymap=''XX'' in your guest config to configure
the VNC
server. I use keymap=''en-gb'' and that serves me well enough
without
client side configuration, but I don''t have much experience with
keymaps
which differ more substantially from the default us one than the UK one
does.

Ian.

I didn''t know about all that, thank you very much, it solved
everything!

-- 
Fabrice DELENTE


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Hello,

On Tuesday 11 September 2012 09:29:21 Fabrice Delente
wrote:
> I didn''t know about all that, thank you very much, it solved
everything!
Daniel P. Berrangé of libvirt fame has written some excellent posts with the 
gory technical details, why VNC often has keyboard problems:
<http://berrange.com/posts/2010/07/04/a-summary-of-scan-code-key-codes-sets-used-in-the-pc-virtualization-stack/>
<http://berrange.com/posts/2010/07/04/more-than-you-or-i-ever-wanted-to-know-about-virtual-keyboard-handling/>
It helped me a lot to understand on how to configure the keyboard layouts to 
make it somehow work.

Sincerely
Philipp
-- 
Philipp Hahn           Open Source Software Engineer      hahn@univention.de
Univention GmbH        be open.                       fon: +49 421 22 232- 0
Mary-Somerville-Str.1  D-28359 Bremen                 fax: +49 421 22 232-99
                                                   http://www.univention.de/


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