SMPlayer Support Forum

This may just be another manifestation of these issues, or it may be something different:
viewtopic.php?f=2&t=8287
viewtopic.php?f=2&t=8286

I'm on Ubuntu 15.10, and running:
SMPLAYER: 15.11.0.7290-1~wily1 from http://ppa.launchpad.net/rvm/smplayer/ubuntu/ (I recently updated to this version, which is when the issue started)
MPV: 0.14.0-1~wily from http://ppa.launchpad.net/mc3man/ffmpeg-test1/ubuntu/

When I start a video, smplayer starts in window mode. I think press "f" to put smplayer into fullscreen mode. If I pause the video and then hit the "f" key again, the video returns to the original window size and position (this is the expected behavior).

However, if while the video is still playing I press the "f" key twice (once to get into fullscreen, and once to return to windowed mode), instead of returning to its original size, it switches to a fullscreen window.

Is this a bug, or a setting I have to change? Is there a solution?

Is the option Stay on top => While playing enabled?
I saw this behaviour with that option on and when using Qt5.

Yes, "Stay on top => while playing" was enabled. I changed it to always and the problem went away. (I changed it to never and the problem went away as well).

I only recently updated to Ubuntu 15.10, so it is possible that it was the update to 15.10 caused this.

I've changed my setting to "Stay on top => Always" until a solution is found.

What version of Qt are you using? You can see it in Help -> About SMPlayer.

Here's my version information:

Version: 15.11.0 (svn r7290)
Using Qt 4.8.6 (compiled with Qt 4.8.6)
Using MPV 0.14.0

Strange. I can't reproduce the problem with Qt 4.8.6. I added a fix for Qt 5.