[Spice-devel] [Engine-devel] SPICE related features

[Hans de Goede]

Hi,

On 02/08/2012 03:43 PM, Oved Ourfalli wrote:
>
>
> ----- Original Message -----
>> From: "Hans de Goede"<hdegoede at redhat.com>
>> To: dlaor at redhat.com
>> Cc: "Oved Ourfalli"<ovedo at redhat.com>, spice-devel at lists.freedesktop.org, engine-devel at ovirt.org
>> Sent: Wednesday, February 8, 2012 4:36:06 PM
>> Subject: Re: [Spice-devel] [Engine-devel] SPICE related features
>>
>> Hi all,
>>
>> Dor, thanks for the forward.
>>
>> On 02/08/2012 12:49 PM, Dor Laor wrote:
>>> On 02/08/2012 01:43 PM, Oved Ourfalli wrote:
>>>> Hello all,
>>>>
>>>> The following feature page describes the engine adjustments needed
>>>> for new SPICE features.
>>>>
>>>> http://www.ovirt.org/wiki/Features/SPICERelatedFeatures
>>
>> Al in all this looks good, some remarks:
>>
>> * WRT multi monitor support for RHEL, the latest RHEL
>> xorg-x11-drv-qxl and
>>     spice-vdagent packages do support multi monitor support using
>>     multiple
>>     cards in Xinerama mode. We are waiting for a RHEL-6 z-stream
>>     update to
>>     fix an x11-xorg-server-Xorg bug which atm makes the mouse unusable
>>     in this
>>     mode wants this lands, multi-monitor support this way should be
>>     available
>>     for RHEL-6.2 (and later) guests. The same holds true for Fedora
>>     guests,
>>     although I don't expect the necessary Xorg changes to be available
>>     for
>>     versions older then Fedora 17. The driving multiple monitors from
>>     a single
>>     qxl device support OTOH is still a long time away, likely 6 months
>>     or so.
>>
> The idea behind this support is to have it on a single PCI card, and not on multiple ones.

Right, I understand, but my point is, that current RHEL (and other Linux distro based)
hypervisors as well as guests do not support the multiple monitors on a single
PCI card setup, but they *do* support the multiple monitors, with each a separate
PCI card setup like we also do for windows. This means that we may want to enable
multiple monitor support for Linux guests *now* using the same code paths / method
as for windows guests and then later, for vms where both the guest and the cluster
support the multiple monitors on a single PCI card setup, use that instead. Which
is not something which the wiki page reflects.

Regards,

Hans