Bug#1109381: evince: hamburger menu often remains open when entering presentation mode

[Simon McVittie]

Control: retitle -1 evince: hamburger menu often remains open when entering presentation mode
Control: found -1 48.0-1

On Wed, 16 Jul 2025 at 10:40:13 +0100, Simon McVittie wrote:
>To reproduce:
>
>* Open a PDF. On a default GNOME installation,
>  /usr/share/doc/shared-mime-info/shared-mime-info-spec.pdf is a
>  convenient example.
>
>* Open the hamburger menu
>
>* Click on "Present as Slideshow"
>
>Expected result: The document fills the screen, with black letterboxing
>or pillarboxing as appropriate. The hamburger menu disappears.
>
>Actual result: In 48.0-1, the document does not fill the screen if the
>test machine is HighDPI (that's #1093497) but the hamburger menu
>correctly disappears. In 48.1-1, the document *does* fill the screen
>(#1093497 is fixed) but the hamburger menu incorrectly does not
>disappear. Clicking outside it does not close it, either.
>
>This might be a regression in 48.1 upstream, or it might be a regression
>in one of the additional patches I applied from the upstream gnome-48
>branch. None of them look like obvious culprits, though, so I'm
>surprised by this regression.

Actually this doesn't seem to be a regression, just a pre-existing 
intermittent bug. The hamburger menu *often* doesn't close correctly, 
but not always: I would estimate 80% it doesn't close and 20% it does.

So this is not necessarily a blocker for 48.1-1 entering trixie, but 
it's quite annoying and it would be great if someone can find a fix. It 
might be a bug in something else, like GTK 3 or lbhandy.

evince is probably going to be replaced by Papers as the default PS/PDF 
viewer for forky, but is still the one installed by default in trixie.

     smcv