Bug#847366: gtk apps die with 'Couldn't open libGL.so.1'

[Simon McVittie]

Control: severity 847366 important

On Tue, 17 Jan 2017 at 11:19:40 +0000, Simon McVittie wrote:
> On Tue, 17 Jan 2017 at 11:34:00 +0100, Dariusz Gadomski wrote:
> > -         shared-mime-info
> > +         shared-mime-info,
> > +         libgl1

Upstream say this is the wrong answer. Using Gtk without GL is *meant*
to work - the problem is that one of the initialization calls is
unconditional (upstream:
<https://bugzilla.gnome.org/show_bug.cgi?id=775279>) and will abort
if there is no GLX library available.

Workaround: "export GDK_GL=disable". Emmanuele Bassi apparently has
a patch somewhere to fix this better, by probing for GLX with dlopen()
before proceeding.

I think this is important (if not RC), because it also affects the
Debian installer: we don't want to have to build a libgl1 udeb.
The installer could use the workaround though.

    S