Key bindings like ctrl+c, ctrl+z and ctrl+s didn’t work in my Sublime Text when I switched to russian layout. This happened on Linux Mint with Cinnamon desktop environment but it probably appears in Ubuntu also.

I solved the problem by adding new key bindings to Preference > Key Bindings:

{ "keys": ["ctrl+с"], "command": "copy" },
{ "keys": ["ctrl+я"], "command": "undo" },
{ "keys": ["ctrl+shift+я"], "command": "redo" },
{ "keys": ["ctrl+ы"], "command": "save" },

I still can’t believe it worked but ctrl+ы sounds awesome!