qpdfview

qpdfview "disappears"

Asked by Arian

My qpdfview windows disappear: it starts fine and I can use it as expected. However, after some time, the window is disappeared: no window can be seen anymore, it's not in the taskbar anymore, but when I open another pdf no new instance appears - my setup is to open them in new tabs. The process seems fine:

> arian@jira:~$ ps aux|grep qpdf
> arian 18249 0.3 10.1 1469168 311372 pts/6 Sl+ 12:42 0:50 qpdfview --unique --choose-instance

I could imagine it sort of looses connection to X, but I really have no Idea how X works, so it's a really wild guess.

The reason I'm not posting this as bug is that I'm really not sure what's at fault - qpdfview or the rest of my system. I mean, it's really strange... I have no Idea how to debug this. I'm not even sure when this happens, but it happened multiple times. I've not actually seen it disappearing, I just noticed the missing windows. It might happen on screenlock (xscreensaver). I *think* I started it in a shell once and had it disappearing with no unusual output, no exit No other prgrams display any such behaviour.

System is debian, a mix of mainly testing with some unstable on amd64. qpdfview 0.4.12. It's xfce 4.12 on Xorg 7.7, no wayland.

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Adam Reichold (adamreichold) said : 		#1

Hello Arian,

I suspect some kind of tool kit problem. You could try to check whether some of your Qt packages do not match up and whether other Qt5-based applications have similar problems. You could also try to build the current version of qpdfview and if this fixes it, it may not be a tool kit issue after all.

For debugging, I can only suggest crawling the X server's log and maybe using "xwininfo -root -children" to find out whether the window still exists or was already destroyed.

Best regards, Adam.

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