Banshee crash on startup

Question

OS- 16.04. Used banshee daily until now, but then got the error.

Fatal log error enclosed.

[ERROR] FATAL UNHANDLED EXCEPTION: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.MethodAccessException: Method `IBusProxy:.ctor ()' is inaccessible from method `NDesk.DBus.BusObject:.ctor ()'

  at (wrapper managed-to-native) System.Object:__icall_wrapper_mono_throw_method_access (intptr,intptr)
  at IBusProxy..ctor () [0x00000] in <8f213ad6c6e7479eb4b70a3891c9ae32>:0 
  at (wrapper managed-to-native) System.Reflection.MonoCMethod:InternalInvoke (System.Reflection.MonoCMethod,object,object[],System.Exception&)
  at System.Reflection.MonoCMethod.InternalInvoke (System.Object obj, System.Object[] parameters) [0x00002] in <f712f98eb8e445c8918edaf595bbe465>:0 
   --- End of inner exception stack trace ---
  at System.Reflection.MonoCMethod.InternalInvoke (System.Object obj, System.Object[] parameters) [0x00019] in <f712f98eb8e445c8918edaf595bbe465>:0 
  at System.RuntimeType.CreateInstanceMono (System.Boolean nonPublic) [0x000ca] in <f712f98eb8e445c8918edaf595bbe465>:0 
  at System.RuntimeType.CreateInstanceSlow (System.Boolean publicOnly, System.Boolean skipCheckThis, System.Boolean fillCache, System.Threading.StackCrawlMark& stackMark) [0x0001a] in <f712f98eb8e445c8918edaf595bbe465>:0 
  at System.RuntimeType.CreateInstanceDefaultCtor (System.Boolean publicOnly, System.Boolean skipCheckThis, System.Boolean fillCache, System.Threading.StackCrawlMark& stackMark) [0x0002a] in <f712f98eb8e445c8918edaf595bbe465>:0 
  at System.Activator.CreateInstance (System.Type type, System.Boolean nonPublic) [0x00040] in <f712f98eb8e445c8918edaf595bbe465>:0 
  at System.Activator.CreateInstance (System.Type type) [0x00000] in <f712f98eb8e445c8918edaf595bbe465>:0 
  at NDesk.DBus.BusObject.GetObject (NDesk.DBus.Connection conn, System.String bus_name, NDesk.DBus.ObjectPath object_path, System.Type declType) [0x00008] in <6f993bb1a1414adf8517b25c86b39e83>:0 
  at NDesk.DBus.Connection.GetObject (System.Type type, System.String bus_name, NDesk.DBus.ObjectPath path) [0x0000d] in <6f993bb1a1414adf8517b25c86b39e83>:0 
  at NDesk.DBus.Connection.GetObject[T] (System.String bus_name, NDesk.DBus.ObjectPath path) [0x00001] in <6f993bb1a1414adf8517b25c86b39e83>:0 
  at NDesk.DBus.Bus..ctor (System.String address) [0x0000f] in <6f993bb1a1414adf8517b25c86b39e83>:0 
  at NDesk.DBus.Bus.Open (System.String address) [0x00033] in <6f993bb1a1414adf8517b25c86b39e83>:0 
  at Mono.Zeroconf.Providers.AvahiDBus.DBusManager.ConnectToSystemBus () [0x0001f] in <6f993bb1a1414adf8517b25c86b39e83>:0 
  at Mono.Zeroconf.Providers.AvahiDBus.DBusManager.IterateThread (System.Object o) [0x00012] in <6f993bb1a1414adf8517b25c86b39e83>:0 
  at System.Threading.QueueUserWorkItemCallback.WaitCallback_Context (System.Object state) [0x0000e] in <f712f98eb8e445c8918edaf595bbe465>:0 
  at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) [0x0008d] in <f712f98eb8e445c8918edaf595bbe465>:0 
  at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) [0x00000] in <f712f98eb8e445c8918edaf595bbe465>:0 
  at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem () [0x0002a] in <f712f98eb8e445c8918edaf595bbe465>:0 
  at System.Threading.ThreadPoolWorkQueue.Dispatch () [0x00096] in <f712f98eb8e445c8918edaf595bbe465>:0 
  at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback () [0x00000] in <f712f98eb8e445c8918edaf595bbe465>:0 

Answer 1

I had the same issue on Arch Linux. I looked at my logs and found that mono has recently been upgraded from version 4.6.1.3-1 to version 4.8.0.495-1. I was able to successfully rollback my mono package to version 4.6.1.3-1 from ALA and banshee seems to work fine now.

I'm not sure of how to do this on Ubuntu but on Arch the command is:

yaourt -S downgrader
downgrader mono

then select mono-4.6.1.3-1 (from ALA)

I tried spinning up a Ubuntu Live environment and even searching http://packages.ubuntu.com/ for the equivalent Ubuntu command but it seems mono is packaged differently under many different packages like mono-runtime or libmono and such so if a person more experienced with Ubuntu could give this person the right command for the OP.

Answer 2

Similar to ThomasG, I also downgraded Mono — to version 4.4.2, just to be sure. This is how I did it:

1. Using Synaptic Package Manager (yes, you can still install it, I prefer it for package management) I removed all packages related to the mono framework. One of the items will trigger removal of most items, and banshee as well. This is fine. Check the list for other software you also want to reinstall afterwards. Also: not all hits with "mono" in the title or description belong to the mono framework.
2. Open "Software and updates", find the mono repository under "Other software" (it starts with http://download.mono-project.com) and edit it as follows:
   • Distribution: "wheezy/snapshots"
   • Components "[version]/main" ("4.4.2/main" in my case).
3. I finally used the command line to run sudo apt update, and then sudo apt list mono-complete to check the version. I then installed mono with sudo apt install mono-complete, then banshee with sudo apt install banshee, both of which required me to accept packages that could not be verified.

I opened banshee, and there it was: running, and with all the play lists intact.