I have an annoying problem with clipboard that makes me sick.
I can only copy text when cutting it. I cannot copy with Ctrl+C; Also, applications sometimes cannot put text to my clipboard (eg keepassx) - they just clearing clipboard or so. I am not sure what causes this, could not find a solution.
My problem is not with terminal or a particular application, it touches all the system and all apps.
I have several input languages, English is at the top of the list.
UPD: Ctrl+A also not working. No solutions working.
ctrl+C
doesn't work in KeePass iflocate-pointer
(pressctrl+F
in DConf, then type it in) is set to true. This is a mono problem and won't solve your actual problem, however.