[Spice-devel] spice-vdagent and X Display Managers on Ubuntu 16.04

[Christophe Fergeau]

Hey,
I'm very late to the party, just a few comments,

On Tue, Oct 11, 2016 at 02:06:27PM +0200, Sergio L. Pascual wrote:
> I've just spent some time tuning an Ubuntu 16.04 (I know Fedora is
> preferred around here, but a lot of clients seem to prefer Ubuntu and
> its derivatives) desktop for VDI usage, and I had a hard time finding a
> X Display Manager which plays nice with spice-vdagent (in the sense of
> adapting properly to resolution changes, something critical for mobile
> clients). I'd like to share my findings:
> 
>  - lightdm, slim, kdm: there's no way to specify a program to be
> executed while running the greeter, must be worked around with a
> wrapper. Changing resolution results in the greeter crashing and/or
> hanging.

What do you call "a wrapper"? Any idea if the crash is caused by the QXL
driver, or if it's an issue on the *dm side?

> 
>  - gdm: applications to be run alongside with greeter can be specified
> in "/usr/share/gdm/greeter/autostart" (which spice-vdagent already
> uses). Sadly, gdm > 3.14 tries to run Xorg as gdm (on greeter) or
> logged in user (after log in), which is not supported by QXL driver, as
> it needs direct PCI access.

I believe this works with Fedora, so this should be manageable somehow?

>  - sddm: needs a wrapper too, but deals nicely with resolution changes
> *IF* not using the "breeze" theme (this drove me crazy for a while,
> diving into its source code).

Same question about the need for a wrapper ?

Christophe
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