Answering the question for posterity.
We found a temporary solution to the described problem.
We had a development cluster with a working SPICE console. By comparing packages we have established the differences between working and not working SPICE setup. We have isolated the spice-server package.
The installed version was spice-server-0.14.0-2.el7_5.3.x86_64
We downgraded the package to spice-server-0.12.8-2.el7.1.x86_64 and rebooted the nodes in sequence.
Now the SPICE console works again.

Kind regards,
Mitja

On 13/06/2018 09:57, Mitja Mihelič wrote:

Greg, thank you for the referral. I will post my question there.

Since oVirt uses spice it seemed like a good shot to ask fellow admins here in the hope somebody has come across something alike.

Kind regards,
Mitja

On 12/06/2018 20:39, Greg Sheremeta wrote:

The spice-devel list can probably help:  https://lists.freedesktop.org/mailman/listinfo/spice-devel

Best wishes,

Greg

On Tue, Jun 12, 2018 at 10:25 AM, Mitja Mihelič <mitja.mihelic@arnes.si> wrote:

Dear all,

We are running the following setup:
ovirt-engine host:
- CentOS release 7.5.1804
- ovirt-engine-4.1.9.1-1.el7.centos.noarch
- spice-html5-0.1.7-1.el7.noarch

We have noticed problems with the Spice console. When it opens and displays the information presented by the VM's console it is OK at first. But as soon as any part of the display changes, that part gets replaced by random pixelated noise.
For example I open the console of a standard CentOS server. When I type something at the login prompt the text is invisible and random pixels are displayed at the position of the blinking cursor. Please see attached screenshot spice-1-login_typing_and_cursor_waiting.png.

Please also see other the attached screenshots.
Login prompt after VM reboot: spice-2-login_after_boot.png
Login prompt after hitting Enter a few times: spice-3-login_2x_enter.png

We have tried and succesfully reproduced the issue on OSX (Chrome, FF, Safari) and Windows (Chrome, FF).
VNC works fine.

Why would this be happening? Help would be very much appreciated.

Kind regards,
Mitja

--
Mitja Mihelič
ARNES, Tehnološki park 18, p.p. 7, SI-1001 Ljubljana, Slovenia
tel: +386 1 479 8877, fax: +386 1 479 88 7

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GREG SHEREMETA

SENIOR SOFTWARE ENGINEER - TEAM LEAD - RHV UX

Red Hat NA

gshereme@redhat.com    IRC: gshereme

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