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I've used Guacamole for a year or so and use it daily. Recently I have encountered an issue when connecting to a Windows 7 VM - one which I connect to often:
- I start the session, log on and see my desktop. All is well and I can browse and develop.
- If I start certain windows (the Cygwin mintty terminal is one of them) the session freezes. Restarting the session results in the same freeze.
Interestingly, I can then RDP in from another windows machine (without guacamole involved) and close or cover the Cygwin mintty window. Restarting the session via guacamole then works... until I uncover the Cygwin mintty window, whereupon it freezes again. From this I deduce that painting of certain windows is causing issues with RDP somewhere in the chain.
The same behaviour is not present in a windows 10 machine via Guacamole. There is nothing untoward in syslog and I hadn't changed Guacamole until this issue (I'm on the git version now - with no luck).
My dayjob is in C++/Java/Python software development so I'm happy to do any legwork - just want to get this fixed and would like some pointers from somebody with a deeper understanding.