Public bug reported:
I've begun to notice this problem on a fresh Zesty install. I've seen
it with gnome-terminal, the standard switcher, and emacs25 but I suspect
other applications may have a similar problem.
Hitting an Alt+<key> combination seems fairly racy. Sometimes it will
do what I expect but other times the key just gets eaten, with (almost)
nothing apparent happening. For example, sometimes when I hit Alt-Tab,
I get to the switcher and can happily switch away. Other times, the
switcher does not come up until I release Alt+Tab and hit it again.
Note that sometimes I might hit and hold Alt just a slight fraction
before I hit the Tab key. The amount of time between hitting Alt and
Tab is very small but unpredictable.
When I say almost nothing happens when Alt+Tab isn't forwarded to the
application, this isn't entirely true. When you're using an application
like chromium-browser or emacs25 that's what I see. However, with
gnome-terminal, as soon as I hit Alt (but before hitting TAB), I see the
application's menus show up in the menu bar. But sometimes, no
application menus show up and all you see is "Terminal". I haven't
completely correlated this with whether Alt is passed to the application
or not but it seems related. I.e. there's weird race condition here
somewhere.
I will try to A/B this behavior against a Yakkety desktop, but it does
seem like a regression and it makes the desktop difficult to use.
** Affects: gnome-desktop (Ubuntu)
Importance: Undecided
Status: New
** Tags: regression-release
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https://bugs.launchpad.net/bugs/1639965
Title:
Alt doesn't always get forwarded to the application
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