I have indeed tried the disable opencl, but in fact I don’t even have the 
drivers for that, and I have tried the various gnome sessions and get the same 
results every time. I was able to run it from a remote desktop session but then 
I couldn’t do anything with the PC or even a new remote session. Seems like the 
display manager was completely messed and I had to reboot. I might have a go at 
kde. Any other suggestions would be gratefully received.

From: Steven Fosdick 
Sent: Tuesday, November 29, 2016 2:04 AM
To: Tobias Ellinghaus 
Cc: [email protected] 
Subject: Re: [darktable-user] Fedora 25 crashes to log in screen

On 29 November 2016 at 02:03, Steven Fosdick wrote:

  On 28 November 2016 at 23:12, Tobias Ellinghaus <[email protected]> wrote:

    Am Montag, 28. November 2016, 17:17:43 CET schrieb Matt Kitcat:
    > Hi All.
    > New install of fedora 25 and Darktable installed via yum (version 2.0.7 I
    > think) If I try to run darktable from a terminal of clicking its icon it
    > crashes me out to the gnome log in screen. I couldn’t spot anything 
obvious
    > when I outputed –d all > debugfile. Can someone help?

    Try starting dt with --disable-opencl. Maybe OpenCL is crashing X?

    > Many thanks

  Or maybe the problem is it is not X at all?  I think Fedora 25 uses Gnome 
3.22 and the session default has changed from X11 to Wayland.  Wayland is 
mostly usable but there do seem to be a few things that can crash it and it is 
much like crashing the X11 server - the syste, reverts to the login screen.

  Darktable works on Wayland for me, but I am not using OpenCL.

And I should have said that the login manager, GDM maybe, should have the 
option to choose the session type so you can also try it in an X session.  On 
GDM, after you have chosen your name, there is a typical "settings" gear 
appears to choose.

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