On a pretty fresh Tumbleweed install on which I did nothing fancier than to install a few packages, simple "Hello World" application in MonoDevelop cannot be debugged. When I push the debug button, MonoDevelop simply replies "Could not connect to debugger". Googling this I found out that there was a similar issue under Gnome, that could be solved by unsetting GNOME_DESKTOP_SESSION_ID, which causes MonoDevelop to use a terminal other than GNOME's standard terminal. See https://superuser.com/questions/669444/monodevelop-cannot-connect-to-debugger They say it's related to the gnome terminal not supporting a certain command line argument anymore. Under KDE doing the same with KDE_SESSION_VERSION does the trick. However, this is only a workaround because the different console that MonoDevelop uses instead of konsole is pretty unusable. Things work fine with the same MonoDevelop version on openSUSE 42.1
I have no control over KDE_SESSION_VERSION; I wonder why this affects MonoDevelop and Konsole. Did you follow this comment on the link and did it work while leaving KDE_SESSION_VERSION as is? Open up the terminal and type this command: sudo apt-get install mono-mcs
The reason this affects MonoDevelop is that it makes MonoDevelop use something other than konsole for the debugging session. So unsetting KDE_SESSION_VERSION does not fix the problem, it merely works around it. I did follow that comment, but only to find that mono-mcs (the Mono C# compiler) is already installed. So in summary: Mono debugging fails on openSUSE Tumbleweed if and only if MonoDevelop tries to use konsole for output. I'm not terribly sure this really is the fault of konsole. It could be a bug in MonoDevelop or some other part of KDE as well. But hunting this down needed to start somewhere...
Thanks for taking the time to report the bug and apologies for the delayed response. Are you able to confirm if this issue still persists between MonoDevelop and Konsole?
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This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!