Looks like this happens every time: if gimp can start (ie, after killing such a stuck process), trying to open a pdf file[1] then exiting will leave such a windowless process, making it impossible to start gimp again via GUI means.
[1]. gimp has a higher priority than evince as a handler of .pdf files, even though using gimp for that purpose is a pretty bad idea. -- ᛊᚨᚾᛁᛏᚣ᛫ᛁᛊ᛫ᚠᛟᚱ᛫ᚦᛖ᛫ᚹᛖᚨᚲ -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]

