I started experiencing this same window disappearing off-screen
problem when I upgraded from Yosemite to El Capitan.  It happens frequently
when I have many baudline windows open and I close the lid on my Mac Book
Pro.  When I open my Mac Book Pro from sleep I find that many of the
baudline window have been moved off-screen and are inaccessible.  Yosemite
and Mavericks did not behave this way.

Erik

On Mon, Jul 25, 2016 at 12:13 PM, Michael Jinks <[email protected]>
wrote:

> Thanks Tom.
>
> Yes, I forgot that detail: in some cases (not always, I think, though I
> can't presently verify how often, this is my gut talking, and this is a
> hard error to make happen on purpose) the vanished windows will still show
> up in the list.
>
> When that happens (and again, this is imperfect recollection talking),
> sometimes selecting one from the list will make it pop back, sometimes it
> won't.  It may be that the ones that do re-appear are the same ones that
> have only slipped underneath another window inside the present display.
>
> I just finished reading that thread in -dev.  Are you aware of any further
> discussion going on elsewhere?
>
> Thanks.
>
>
> On Mon, Jul 25, 2016 at 1:29 PM, Tom Lane <[email protected]> wrote:
>
>> Michael Jinks <[email protected]> writes:
>> > The gist is, if I have an xterm that displays a shell running over an
>> ssh
>> > connection, and I switch over to a different desktop or let my display
>> go
>> > to screen saver mode, that xterm might be gone when I come back.
>> > ...
>> > Sometimes, it hasn't disappeared completely; instead, it's relocated to
>> a
>> > different part of the screen, underneath another xterm.
>>
>> I have seen some cases where XQuartz manages to relocate a window
>> completely off-screen; see thread starting here:
>> https://lists.macosforge.org/pipermail/xquartz-dev/2016-May/003958.html
>> Is it possible that that's what's happening to you, rather than the xterm
>> getting killed completely?
>>
>> For me, that happened with sleep/wake cycles or screen resizes (such as
>> attaching or removing an external monitor), but I would not be surprised
>> if a workspace swap or screensaver start/stop caused much the same thing.
>>
>> > I run all my shells under screen sessions at the remote end, and those
>> > screen sessions are almost always still listed as live at the server,
>> so it
>> > can take some trial and error to find out which displays I lost.
>>
>> That sure sounds like the process is still there somewhere --- have you
>> tried to correlate against "ps" output to determine that?
>>
>> FWIW, I've had some luck with getting such windows back in view by doing
>> another sleep/wake cycle.  Also notice that it seemed to be affected by
>> how the window's position had been determined to start with.
>>
>>                         regards, tom lane
>>
>
>
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