That is really all there is to it. I am running Trisquel 7 Belenos with belenos, belenos-security, belenos-backports, and belenos-updates enabled, on an ASUS N43SL, with your very own Trisquel (customised GNOME fallback) desktop environment. I installed monodevelop with sudo apt-get install monodevelop, and it went through fine. However, I tried running monodevelop from both the application menu and from a terminal, with and without root. When running from the menu, a 'Starting MonoDevelop...' window (which I could not actually open) appeared in the window switcher. No monodevelop or related processes were found in the System Monitor either before, during, or after my run attempts. When running from terminal, the mysterious hidden window did not appear, and the command simply gave me a new prompt. monodevelop --no-splash did nothing, but monodevelop --no-redirect gave this output:
FATAL ERROR [2015-06-22 19:37:47Z]: MonoDevelop failed to start. Some of the assemblies required to run MonoDevelop (for example gtk-sharp)may not be properly installed in the GAC. System.Exception: Toolkit could not be loaded ---> System.IO.FileNotFoundException: Could not load file or assembly 'Mono.Cairo, Version=4.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756' or one of its dependencies. File name: 'Mono.Cairo, Version=4.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756' at System.Reflection.MonoCMethod.InternalInvoke (System.Object obj, System.Object[] parameters) [0x00000] in <filename unknown>:0 at System.Activator.CreateInstance (System.Type type, Boolean nonPublic) [0x00000] in <filename unknown>:0 at System.Activator.CreateInstance (System.Type type) [0x00000] in <filename unknown>:0 at Xwt.Backends.ToolkitEngineBackend.CreateBackend (System.Type backendType) [0x00000] in <filename unknown>:0 at Xwt.Backends.ToolkitEngineBackend.CreateBackend[TextLayoutBackendHandler] () [0x00000] in <filename unknown>:0 at Xwt.Toolkit.Initialize (Boolean isGuest) [0x00000] in <filename unknown>:0 at Xwt.Toolkit.LoadBackend (System.String type, Boolean isGuest, Boolean throwIfFails) [0x00000] in <filename unknown>:0 --- End of inner exception stack trace --- at Xwt.Toolkit.LoadBackend (System.String type, Boolean isGuest, Boolean throwIfFails) [0x00000] in <filename unknown>:0 at Xwt.Toolkit.Load (System.String fullTypeName, Boolean isGuest) [0x00000] in <filename unknown>:0 at Xwt.Application.Initialize (System.String backendType) [0x00000] in <filename unknown>:0 at Xwt.Application.Initialize (ToolkitType type) [0x00000] in <filename unknown>:0 at Xwt.Application.InitializeAsGuest (ToolkitType type) [0x00000] in <filename unknown>:0 at MonoDevelop.Ide.IdeStartup.Run (MonoDevelop.Ide.MonoDevelopOptions options) [0x00000] in <filename unknown>:0 at MonoDevelop.Ide.IdeStartup.Main (System.String[] args) [0x00000] in <filename unknown>:0 >From this output, mjmhogg71 suggested installing libmono-cairo2.0-cil. I did, and that resolved the issue. Monodevelop launches fine now, and works as advertised. However, upon attempting to compile a piece of C# code, the status bar thingy at the top of the mono interface complained of not being able to find a C# compiler. I installed mono-devel (it probably would have worked with mono-mcs alone) and programs now compile fine. I fear there may be other problems with missing dependencies. Currently, neither mono-devel, mono-mcs, or libmono-cairo2.0-cil are listed as dependencies of the package monodevelop in the package repository. However, from what I remember of Mono under Debian, all of these packages were dependencies (though you should probably check the Debian repo), and it worked fine out of the box. One strange thing to note: it worked absolutely flawlessly out of the box no more than two/three weeks ago under Xfce. To conclude: I think mono-devel and libmono-cairo2.0-cil should be added to the monodevelop .deb as dependencies. A surefire way of avoiding this problem in any case.
