suggested fix above (with downgrading packages) broke my thunderbird and ff: /usr/lib/thunderbird/thunderbird: symbol lookup error: /usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0: undefined symbol: _XGetRequest
suggested fix above (with downgrading packages) broke my thunderbird and ff: thunderbird/ thunderbird: symbol lookup error: /usr/lib/ x86_64- linux-gnu/ libgdk- x11-2.0. so.0: undefined symbol: _XGetRequest
/usr/lib/