Re: [gnome-flashback] Gnome FB Meta on F22 fails to start locally

[Michael DePaulo <mikedep333 gmail com>]

On Sun, Aug 9, 2015 at 4:04 PM, Alberts Muktupāvels
<alberts muktupavels gmail com> wrote:
> Hi,
>
> On Sun, Aug 9, 2015 at 10:44 PM, Michael DePaulo <mikedep333 gmail com>
> wrote:
> > Hi Gnome Flashback devs,
> >
> > As previously mentioned, Yaakov Selkowitz and I are working on
> > packaging GNOME Flashback for Fedora.
> > https://copr.fedoraproject.org/coprs/yselkowitz/gnome-flashback/
> >
> > http://pastebin.com/AKA2YuDu
> >
> > Anyway, I installed Fedora 22 (GNOME 3.16) on my laptop and GNOME
> > Flashback Metacity 3.16.x is failing to start locally via GDM.
> > Surprisingly, it successfully starts remotely via TigerVNC on the
> > laptop and on an Amazon EC2 instance. I can also start regular GNOME,
> > or GNOME Classic, on the laptop locally.
> >
> > Both outputs below are from `journalctl --user`. I am calling
> > gnome-flashback-metacity with --debug.
> >
> > Output from a failed local session:
> > http://pastebin.com/uF162cR7
> >
> > Output from a successful remote (TigerVNC) session on the same laptop:
> > http://pastebin.com/1ixSQt40
> >
> > It seems that the gnome-flashback executable itself is failing. I can
> > even see gnome-panel for a split second after I dismiss the fail
> > whale.
>
>
> Is there any error message or something when gnome-flashback fails to start?
> Do you have same problem if you try to use gnome-flashback from git master?

I created a test "xterm" xsession and tried to run gnome-flashback. It
segfaulted.
http://pastebin.com/WFQGgpJ6

I will try the version from git master.

> > In my ~/.vnc/.xstartup script, I have these 2 lines, which may be
> > significant:
> > unset SESSION_MANAGER
> > unset DBUS_SESSION_BUS_ADDRESS
> >
> > Also,
> >
> > GDM is reading from the xsession file, which contains this line:
> > DesktopNames=GNOME-Flashback;GNOME;
> >
> > Whereas for TigerVNC, I have this line in ~/.Xclients
> > export XDG_CURRENT_DESKTOP=GNOME-Flashback;GNOME;
>
>
> ; - is used only in .desktop files
> : - should be used when setting environment variable
>
> That line should be:
> export XDG_CURRENT_DESKTOP=GNOME-Flashback:GNOME
>
> Just in case it is not a typo....

1. It looks like this is a bug. I will submit a patch.
https://git.gnome.org/browse/gnome-flashback/tree/data/gnome-flashback-metacity.desktop.in.in
https://git.gnome.org/browse/gnome-flashback/tree/data/gnome-flashback-compiz.desktop.in.in

2. I edited the .xsession file on my system and it did not fix the
issue with the local session. (I made sure to restart GDM).

3. It did fix compatibility with the simple project I have been
working on all day (xsession-chooser-pygtk), which I was using under
TigerVNC. My project uses the .xsession file:
https://github.com/mikedep333/xsession-chooser-pygtk

4. When I had that wrong logic in my ~/.Xclients file for TigerVNC,
bash tried to execute "GNOME", but it left the environment variable
set to "GNOME-Flashback". So some autostart apps were not starting up
correctly under TigerVNC., but now they are under TigerVNC.

> > So those 2 lines should be equivalent.
> >
> > And here is the list of packages and their versions on the laptop:
> > http://pastebin.com/AKA2YuDu
> >
> > -Mike
> --
> Alberts Muktupāvels