linux with multiple "monitors" issues

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Hi All,

You may remember me as the guy who about once a month complains that multiple "monitors" simply doesn't work in linux.

I have tested various configurations of centos 6, fedora 19 and fedora 20 beta as host, guest and client.

Well I think I've finally made some progress which I'll thought worth reporting back.

These results (below) are approximately the same on Fedora 20 beta and Fedora 19 (host+guest+client).

I was trolling through the Fedora "features" (or whatever they're called now) and noticed that qxl KMS driver has made it's way into fedora. That gave me an idea: disable it! Sure enough, things are WAAAAYYY more stable after blacklisting qxl.ko.

Right away 3 major problems go away:

1) second "monitor" shows entire workspace (e.g. monitor 1 and 2 combined)
2) actual mouse position offset up and left from displayed mouse position
3) qxl/spice crash after disconnecting, which prevents reconnecting to the VM (although VM quite happy) until "power cycle"

I still cannot get 1900x1200 on both monitors, but this could be a memory limitation. I'm back to the defaults, which I believe are 64MB. However, at least the system "gracefully" degrades to a resolution less than what I requested, and stays stable.

If anyone wants any kind of debugging, logs etc. with/without qxl.ko installed to narrow this down, I'll do it. Let me know.

So kudos to all for what I've always hoped to see, and finally do! Looking good everybody.

--
Thanks,
David Mansfield
Cobite, INC.
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