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From Hogne Vevle ...@webhuset.no>
Subject Re: Keyboard mapping with Ubuntu 16 and CentOS 7
Date Fri, 20 Jan 2017 19:26:38 GMT
Thanks a lot, Frode and Mike!

All connections are made towards XenServer, which provides a VNC endpoint for all its VM's.
Could seem like a bug in XenServer then. This one seems very relevant: https://bugs.xenserver.org/browse/XSO-650
<https://bugs.xenserver.org/browse/XSO-650> . 

I’ll do some tests with newer versions of XenServer (all VM’s I’ve currently tested
were on XS 6.5). Hopefully that will provide a solution, and give us yet another incentive
for pushing forward our migrations to XS 7 :)

Thanks again! 

Cheers,
Hogne


> 20. jan. 2017 kl. 20.10 skrev Frode Langelo <frode@apache.org>:
> 
> As Mike says; QEMU needs to know which keyboard layout is to be used for non-US keyboards.
Try running with -k no for Norwegian layout.
> 
> There is some more info here:
> http://wiki.qemu.org/download/qemu-doc.html#sec_005finvocation <http://wiki.qemu.org/download/qemu-doc.html#sec_005finvocation>
> 
> Frode
> 
> On Fri, Jan 20, 2017 at 11:05 AM, Mike Jumper <mike.jumper@guac-dev.org <mailto:mike.jumper@guac-dev.org>>
wrote:
> On Fri, Jan 20, 2017 at 10:56 AM, Hogne Vevle <hv@webhuset.no <mailto:hv@webhuset.no>>
wrote:
> Hi again, all!
> 
> I’m following up on this with some guacd logs:
> 
> Jan 20 19:46:21 vps-vnc-proxy guacd[14279]: Protocol "vnc" selected
> Jan 20 19:46:21 vps-vnc-proxy guacd[14279]: Connection ID is "$62f15d6f-da12-45d5-990b-84d57e2c3946"
> Jan 20 19:46:21 vps-vnc-proxy guacd[14279]: VNC server supports protocol version 3.8
(viewer 3.8)
> Jan 20 19:46:21 vps-vnc-proxy guacd[14279]: We have 1 security types to read
> Jan 20 19:46:21 vps-vnc-proxy guacd[14279]: 0) Received security type 1
> Jan 20 19:46:21 vps-vnc-proxy guacd[14279]: Selecting security type 1 (0/1 in the list)
> Jan 20 19:46:21 vps-vnc-proxy guacd[14279]: Selected Security Scheme 1
> Jan 20 19:46:21 vps-vnc-proxy guacd[14279]: No authentication needed
> Jan 20 19:46:21 vps-vnc-proxy guacd[14279]: VNC authentication succeeded
> Jan 20 19:46:21 vps-vnc-proxy guacd[14279]: Desktop name "QEMU"
> 
> If you're connecting to QEMU's built-in VNC server, this may be why the keyboard mapping
is not working correctly.
> 
> Both Guacamole and VNC use X11 keysyms to represent key events. These keysyms are independent
of keyboard layout, and represent the actual identity of the key pressed. Because QEMU needs
to emulate the hardware of the keyboard, it will internally need to translate those keysyms
back into scancodes, thus removing the identity of the key pressed. The information reaching
the OS running beneath QEMU describes nothing more than the location of the key on the keyboard,
and the OS will re-interpret that according to the keyboard layout it's configured to use.
> 
> There is likely a way to inform QEMU of the keyboard layout of the guest OS, allowing
that mapping process to work correctly, but you will still be limited by the keys defined
by the layout of the guest OS. You won't be able to type characters which are not present
in that keyboard layout.
> 
> If you instead run a native VNC server within the guest OS itself, there won't be that
intervening keysym -> scancode layer, and things should work as expected.
> 
> - Mike
> 
> 


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