Actually, I believe this is a unity7 bug since ubuntu-gnome-desktop does
the right thing.
** Also affects: unity (Ubuntu)
Importance: Undecided
Status: New
** No longer affects: gnome-desktop (Ubuntu)
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https://bugs.launchpad.net/bugs/1639965
Title:
Alt doesn't always get forwarded to the application
Status in unity package in Ubuntu:
New
Bug description:
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.
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