Good idea! But no joy ... No Wayland here - I am still on X.

$ echo $XDG_SESSION_TYPE
x11

Just in case - I tried your command to force x11 and got exactly the same error.

--

Bill Gee

On Wednesday, July 17, 2019 3:57:32 PM CDT Olly Betts wrote:

> On Wed, Jul 17, 2019 at 09:22:55PM +0100, James Begley wrote:

> > The build of Loch from the copr repository works for me on my fedora 30

> > workstation, so I'm guessing that there is an incompatibility with some

> > libraries on your laptop and desktop. You say that Loch "no longer works",

> > so presumably it used to work? Do you know vaguely when it stopped working?

> > Note that the build of Loch in the copr repository hasn't changed since the

> > therion 5.4.4 build on the 1st of May, so if Loch was working after that

> > date, and isnt working now then it would point to an external library

> > problem.

> >

> > Your error message points to a problem within the lxR2P.c file (

> > https://github.com/therion/therion/blob/master/loch/lxR2P.c) which would

> > suggest that the mesa-libGL package might be causing this issue. I've got

> > version 19.0.8-1 installed here, which was built on the 26th June (see

> > https://koji.fedoraproject.org/koji/packageinfo?packageID=184), but the

> > Loch copr package would have been originally built against 19.0.3-1 . Does

> > that help? (The mesa changelogs from https://www.mesa3d.org/ don't help me

> > very much!).

>

> Currently wxWidgets' OpenGL support requires X and doesn't work with

> Wayland.

>

> Fedora now defaults to Wayland, so perhaps Bill is using that default

> but James is still using X?

>

> You can override for a single application by running it from a terminal

> like so:

>

> GDK_BACKEND=x11 loch

>

> In Survex this workaround is implemented in the aven code, but I don't

> see anything equivalent in the therion code.

>

> Cheers,

> Olly

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