Michael,
The problem with the jumping windows started with Yosemite and continued with
El Capitan. As of Sierra, the problem has gone away. As far as I know, it has
never been understood or explained what caused the behavior, and what changed
with Sierra to make the problem go away. It is definitely an interaction
between quartz-wm and Mac OS, if you run a different window manager you don’t
have the jumping xterm issue. The wiindows don’t randomly jump, it is very
predictable: the x and y coordinates of the upper left corner of the window get
doubled.
My recommendation is to upgrade to Sierra to resolve the jumping window
problems.
As to not being able to open new xterms, if you still have any working xterm
windows, try starting up an xterm directly from that window. If it fails, you
should then see any error diagnostics from xterm for why it was unable to open
up a new window.
-David Borman
> On Nov 30, 2016, at 7:21 AM, Michael Parson <mpar...@bl.org> wrote:
>
> On Tue, 29 Nov 2016, Jeremy Huddleston Sequoia wrote:
>>> On Nov 29, 2016, at 12:46 PM, Michael Parson <mpar...@bl.org> wrote:
>>>
>>> I recently updated to XQuartz 2.7.11 when prompted that the update was
>>> available. Since then, I've been seeing some issues:
>>>
>>> 1. I work in xterms as my primary terminal program. I step away from
>>> the system for a while, the screensaver kicks in and the screen locks.
>>> When I come back and unlock the screen, my xterms have all shifted
>>> around on the screen.
>>
>> Odd, but I can't imagine this is related to XQuartz or quartz-wm as
>> I don't think anything has changed in that area for a few years. I
>> recall some folks saying that window placement bugs started happening
>> in either Yosemite or El Cap and got better in Sierra. Hopefully
>> someone can chime in with more details there.
>
> As someone mentions later, this has come up before. It was just new
> behavior for me after upgrading to 2.7.11, I'd not seen it before.
>
>>> 2. The next bit of bad behavior is that I can no longer open new X11
>>> windows, either via CMD-N to open a new xterm or if I fire up the native
>>> Terminal.app and try to run an xterm from there, no new window opens.
>>
>> Did you log out and back in. A recent version of XQuartz changed some
>> paths, so the LaunchAgent needs to get reloaded when crossing that
>> version change.
>
> I did do a logout/login cycle after I first upgraded XQuartz. The Mac
> has been reboot a few times since then as well, this behavior returns.
>
> Reading this now, I wasn't clear. This only happens after I've stepped
> away from the Mac for a while, the screen saver has kicked in, the
> screen-lock has enabled (I have a slight delay between screen-saver &
> lock). When I unlock the system, my xterms have shifted down and to
> the right and I can no longer open new x-windows locally (cmd-n for an
> xterm, or running 'xterm' from a Terminal.app session). I can, however,
> launch X11 apps on systems that I was already logged into via xterm->ssh
> and those windows appear. I thought I'd tried launching a new xterm
> from an existing xterm, but I'll double-check and see if that works the
> next time this behavior pops up.
>
> This has happened a few times, and each time I have done a full reboot
> to recover. Next time, I'll try to log out and log back in and see if
> that fixes it.
>
> --
> Michael Parson
> Pflugerville, TX
> KF5LGQ
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