I have a lot of hangs using spreadsheets (separate bugzilla) where I have to kill LibreOffice. I usually use the "force misbehaving application to quit" icon on my desktop to kill applications. About a third of the time, LibreOffice refuses to start again. I have to log into a terminal window, do ps -ef, find the two LO processes that are still there and kill the second one of them to completely get rid of old processes so I can start LO again. This is very annoying and probably really puts off users who want to stick with a desktop for their office work.
Thanks for bugreport Please, verify if in last version of LibreOffice still reproducible If reproducible, try also on computer with different VideoCard
I have updated versions, and it is harder to reproduce. I will see if I can come up with a different case and file a new bug. I think this one can be closed now.