noVNC error

[Balanca]

I see several messages for the same noVNC error, but none solved my problem (most of them relie on a previous Proxmox version which worked with Java).

command '/bin/nc6 -l -p 5900 -w 10 -e '/usr/sbin/qm vncproxy 102 2>/dev/null'' failed: exit code 1

When I launch a noVNC console for the web GUI, I have immediate error (see attached image) or I have the connection during, say, 0.5 second displaying the virtual machine screen, then the error.

I rebooted.
I tested with Firefox and Chrome.
I tested from 2 different computers (the second one was never used to connect to Proxmox).

This was a fresh install, so I reinstalled: same problem.

$ pveversion --verbose
proxmox-ve: 4.1-39 (running kernel: 4.2.8-1-pve)
pve-manager: 4.1-22 (running version: 4.1-22/aca130cf)
pve-kernel-4.2.8-1-pve: 4.2.8-39
lvm2: 2.02.116-pve2
corosync-pve: 2.3.5-2
libqb0: 1.0-1
pve-cluster: 4.0-36
qemu-server: 4.0-64
pve-firmware: 1.1-7
libpve-common-perl: 4.0-54
libpve-access-control: 4.0-13
libpve-storage-perl: 4.0-45
pve-libspice-server1: 0.12.5-2
vncterm: 1.2-1
pve-qemu-kvm: 2.5-9
pve-container: 1.0-52
pve-firewall: 2.0-22
pve-ha-manager: 1.0-25
ksm-control-daemon: 1.2-1
glusterfs-client: 3.5.2-2+deb8u1
lxc-pve: 1.1.5-7
lxcfs: 2.0.0-pve2
cgmanager: 0.39-pve1
criu: 1.6.0-1
zfsutils: 0.6.5.2-2

EDIT 1: if I use the monitor to change vnc settings, I can connect with a regular vnc client

change vnc :0
change vnc password

I can't enter a password, so it remain empty. Then I can direct a vnc client to 10.10.10.8::5900 without password and I get the correct behaviour. I can interract with the virtual machine.


EDIT 2: when I get the 0.5 second connection throught noVNC, if the mouse pointer is out of the window, then the image remain on screen. As soon as the mouse enter the window, the error is displayed.

 

[Balanca]

Seriously, I worked more than one hour on this problem, and now it is solved without doing anything!