Re: [gnome-flashback] Trouble starting GNOME Flashback on TigerVNC on Fedora 22

[Michael DePaulo <mikedep333 gmail com>]

On Sun, Jul 19, 2015 at 12:09 PM, Alberts Muktupāvels
<alberts muktupavels gmail com> wrote:
> On Sun, Jul 19, 2015 at 6:55 PM, Michael DePaulo <mikedep333 gmail com>
> wrote:
> > On Sun, Jul 19, 2015 at 11:44 AM, Alberts Muktupāvels
> > <alberts muktupavels gmail com> wrote:
> > > Hi,
> > >
> > > On Sun, Jul 19, 2015 at 6:28 PM, Michael DePaulo <mikedep333 gmail com>
> > > wrote:
> > > > Hi,
> > > >
> > > > Yaakov Selkowitz and I are working on packaging GNOME Flashback for
> > > > Fedora.
> > > >
> > > > Some of the packages are released as updates. Some are under updates
> > > > in testing. The rest are in this copr repo:
> > > > https://copr.fedoraproject.org/coprs/yselkowitz/gnome-flashback/
> > > >
> > > > Right now, on Fedora 22 with that copr repo, both GNOME and GNOME
> > > > Flashback (Metacity) launch fine from GDM. And with TigerVNC, which
> > > > does support GLX and Composite, I can launch a GNOME session fine.
> > > >
> > > > However, I cannot launch a GNOME Flashback (Metacity) session with
> > > > TigerVNC.
> > >
> > >
> > >
> > > I dont use and/or test GNOME Flashabck with vnc.
> >
> > Ack.
> >
> > > > The problem appears to be that metacity & gnome-settings-daemon start
> > > > and stay running, but gnome-flashback and gnome-panel do not. So when
> > > > I connect with TigerVNC client, all I see is the grey background.
> > > >
> > > > I've attached the journal output (journalctl --user) and the list of
> > > > running processes. I also attached the list of installed packages and
> > > > their versions.
> > > >
> > > > I am assuming that you need more output, since the journal does not
> > > > appear to contain any relevant output. Let me know what you need.
> > >
> > >
> > >
> > > Maybe add --debug to gnome-session?:
> > > gnome-session --session=gnome-flashback-metacity --debug
> > [...]
> >
> > See attachment.
> >
> > This time, I outputted the journal after I ended the VNC server
> > (vncserver -kill :1).
>
>
> "Jul 19 11:50:16 fedora-22-3 gnome-session[2641]: DEBUG(+): GsmManager:
> ID: /org/gnome/SessionManager/App3        app-id:gnome-panel.desktop
> is-disabled:1        is-conditionally-disabled:0"
>
> Do you have set XDG_CURRENT_DESKTOP?
>
> --
> Alberts Muktupāvels

I did not.

Prepending this line to ~/.Xclients fixed the problem:
export XDG_CURRENT_DESKTOP=GNOME-Flashback

http://i.imgur.com/oUdGGzh.png
Isn't it pretty? It's running on Amazon EC2.

Thanks.

I will figure out how to make sure the env var is set in terms of
Fedora packaging. I will probably submit an update to the package
xorg-x11-xinit, which provides /etc/X11/xinit/Xclients .

Personally, I feel like creating a simple graphical utility like
"xdg-session-launcher" so that users of TigerVNC and XSpice can select
which X session (/usr/share/xsessions/*.desktop) to launch after they
connect, rather than relying on scripts to select which one.

It should work with X2Go also, although X2Go lets you select which
desktop environment to launch before you connect.

-Mike