I am using Fedora 25 and installed it from the official repos, but it does not start. Using Wayland, of course.
Started from the command line it just shows this:
7.0 unix: Caught signal SIGSEGV (0x0000000000000003)
openclonk(+0x19680c)[0x557b1a3b580c]
openclonk(+0x196a10)[0x557b1a3b5a10]
/lib64/libpthread.so.0(+0x115c0)[0x7f8b38c585c0]
/lib64/libX11.so.6(_XSend+0x7e)[0x7f8b3bbbf51e]
/lib64/libX11.so.6(XQueryExtension+0x84)[0x7f8b3bbb5c94]
/lib64/libX11.so.6(XInitExtension+0x32)[0x7f8b3bba97d2]
/lib64/libXext.so.6(XextAddDisplay+0x4f)[0x7f8b3758720f]
/lib64/libXrandr.so.2(+0x1d56)[0x7f8b3b974d56]
/lib64/libXrandr.so.2(XRRQueryExtension+0x11)[0x7f8b3b975381]
openclonk(_ZN13C4AbstractApp4InitEiPPc+0x9f)[0x557b1a3bea2f]
openclonk(main+0x12a)[0x557b1a3b0faa]
/lib64/libc.so.6(__libc_start_main+0xf1)[0x7f8b37df1401]
openclonk(_start+0x2a)[0x557b1a3b563a]
I've already opened an issue in the RedHat bug tracker (https://bugzilla.redhat.com/show_bug.cgi?id=1454638), but nobody answered there, yet, so I thought maybe you have some ideas…
Started from the command line it just shows this:
7.0 unix: Caught signal SIGSEGV (0x0000000000000003)
openclonk(+0x19680c)[0x557b1a3b580c]
openclonk(+0x196a10)[0x557b1a3b5a10]
/lib64/libpthread.so.0(+0x115c0)[0x7f8b38c585c0]
/lib64/libX11.so.6(_XSend+0x7e)[0x7f8b3bbbf51e]
/lib64/libX11.so.6(XQueryExtension+0x84)[0x7f8b3bbb5c94]
/lib64/libX11.so.6(XInitExtension+0x32)[0x7f8b3bba97d2]
/lib64/libXext.so.6(XextAddDisplay+0x4f)[0x7f8b3758720f]
/lib64/libXrandr.so.2(+0x1d56)[0x7f8b3b974d56]
/lib64/libXrandr.so.2(XRRQueryExtension+0x11)[0x7f8b3b975381]
openclonk(_ZN13C4AbstractApp4InitEiPPc+0x9f)[0x557b1a3bea2f]
openclonk(main+0x12a)[0x557b1a3b0faa]
/lib64/libc.so.6(__libc_start_main+0xf1)[0x7f8b37df1401]
openclonk(_start+0x2a)[0x557b1a3b563a]
I've already opened an issue in the RedHat bug tracker (https://bugzilla.redhat.com/show_bug.cgi?id=1454638), but nobody answered there, yet, so I thought maybe you have some ideas…

Actually I just tried it under Xorg, but there is no difference.
rugk, please try this new build for testing: https://koji.fedoraproject.org/koji/taskinfo?taskID=19740092
I would do so if I knew how to download it. Can I do it with dnf or how else?
Thanks for the link. Of course, installing rpm files is easy. But – to learn for future things – how can I get to these from the site https://koji.fedoraproject.org/koji/taskinfo?taskID=19740092? There is no .rpm download link or so…
Hello.
I'm rebuilding your latest GitHub commit of Openclonk-8.0.
Openclonk is not running with this message:
[20:21:41] OpenClonk
[20:21:41] Version: 8.0-alpha unix linux-x86_64 (04ec41b54cf1 - 2017-05-27 16:34:33 +0900)
[20:21:41] ExePath: "/usr/bin/"
[20:21:41] SystemDataPath: "/usr/share/openclonk/"
[20:21:41] UserDataPath: "/home/sagitter/.clonk/openclonk/"
[20:21:41] Command line: openclonk
[20:21:41] Couldn't find matching GLX visual
[20:21:41] Game cleared.
[20:21:41] Engine shut down.
I'm rebuilding your latest GitHub commit of Openclonk-8.0.
Openclonk is not running with this message:
[20:21:41] OpenClonk
[20:21:41] Version: 8.0-alpha unix linux-x86_64 (04ec41b54cf1 - 2017-05-27 16:34:33 +0900)
[20:21:41] ExePath: "/usr/bin/"
[20:21:41] SystemDataPath: "/usr/share/openclonk/"
[20:21:41] UserDataPath: "/home/sagitter/.clonk/openclonk/"
[20:21:41] Command line: openclonk
[20:21:41] Couldn't find matching GLX visual
[20:21:41] Game cleared.
[20:21:41] Engine shut down.

I might also answer here if that's okay, so in Fedora 25 OpenGl v3.0 seems to be used…
$ glxinfo | grep "OpenGL version"
OpenGL version string: 3.0 Mesa 17.0.5
I don't know whether there is another game in the Fedora repos using SDL2, however…
$ glxinfo | grep "OpenGL version"
OpenGL version string: 3.0 Mesa 17.0.5
I don't know whether there is another game in the Fedora repos using SDL2, however…
But… uh, if the core version matters, it is v4…
$ glxinfo | grep "version"
server glx version string: 1.4
client glx version string: 1.4
GLX version: 1.4
Max core profile version: 4.3
Max compat profile version: 3.0
Max GLES1 profile version: 1.1
Max GLES[23] profile version: 3.1
OpenGL core profile version string: 4.3 (Core Profile) Mesa 17.0.5
OpenGL core profile shading language version string: 4.30
OpenGL version string: 3.0 Mesa 17.0.5
OpenGL shading language version string: 1.30
OpenGL ES profile version string: OpenGL ES 3.1 Mesa 17.0.5
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.10
$ glxinfo | grep "version"
server glx version string: 1.4
client glx version string: 1.4
GLX version: 1.4
Max core profile version: 4.3
Max compat profile version: 3.0
Max GLES1 profile version: 1.1
Max GLES[23] profile version: 3.1
OpenGL core profile version string: 4.3 (Core Profile) Mesa 17.0.5
OpenGL core profile shading language version string: 4.30
OpenGL version string: 3.0 Mesa 17.0.5
OpenGL shading language version string: 1.30
OpenGL ES profile version string: OpenGL ES 3.1 Mesa 17.0.5
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.10

What's your graphics card? Did you try proprietary drivers for NVIDIA/AMD?
It should also work without it. For me I'm on Gallium 0.4 on NVD9 using an NVIDIA GPU.
I can run both Openclonk 7.0 and 8-alpha on Fedora 25 if Wayland is not used. To disable Wayland: https://ask.fedoraproject.org/en/answers/96135/revisions/
Then, create a 'xorg.conf' file by following these simple steps: https://fedoraproject.org/wiki/How_to_create_xorg.conf
@rugk, can you try this way?
@Luchs, when are you going to release a first Openclonk 8 release?
Then, create a 'xorg.conf' file by following these simple steps: https://fedoraproject.org/wiki/How_to_create_xorg.conf
@rugk, can you try this way?
@Luchs, when are you going to release a first Openclonk 8 release?
Why disable it? One can just choose "Xorg" in the login screen and when I tried this with the current version, it does not work.
>Why disable it? One can just choose "Xorg" in the login screen
Yes, i know.
Have you created 'xorg,conf' ?
See https://bugzilla.redhat.com/show_bug.cgi?id=1454638#c7 for updates.
TL;DR: It works when executed as `WAYLAND_DISPLAY='' openclonk` on the command line.
https://fedoraproject.org/wiki/How_to_debug_Wayland_problems
TL;DR: It works when executed as `WAYLAND_DISPLAY='' openclonk` on the command line.
https://fedoraproject.org/wiki/How_to_debug_Wayland_problems
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