[Xquartz-dev] Not autoswitching X11 -> Aqua -> X11

[Peter Collinson]

Dunno if this is related - but I sometimes get momentary loss of focus  
when my screen desktop decides to move onto the next image. I run a  
screen setup where the desktop image is taken from a folder of images  
and is changed every 30 mins. This is not sufficiently annoying to  
make me complain, and perhaps is a 'Finder feature' - I presume that  
it's too busy messing with image resize to pass on keyboard events  
(just guessing).

On 25 Aug 2009, at 18:03, Jeremy Huddleston wrote:

>
> On Aug 25, 2009, at 08:01, Eeri Kask wrote:
>> At first sight it seemed this phenomenon happens about once per
>> hour, a longer observation revealed it happens at the same time
>> *exactly* once per hour, the time-point probably depending on the
>> moment the machine is started.
>
> It seems to happen when an application marked LSUIElement is  
> launched.  This should have no effect on the focused application,  
> but it seems to be what triggers this momentary focus loss.
>
> The bug report for this issue is here:
> http://xquartz.macosforge.org/trac/ticket/58
>
>
>> As it seemed like a "cron"-daemon-like problem I purposefully
>> started shutting down system processes as much as I could, please
>> find attached the minimal process list I ended up after booting into
>> running a usable computing environment which still includes a
>> configuration showing this X11->Aqua->X11 phenomenon.  (Being new to
>> MacOS, not knowing any better I had to scramble Finder, Dock,
>> Spotlight, etc *.app/ directories to keep them all off while booting
>> ... I am very grateful to any hint how to accomplish this by some
>> less-intrusive method, e.g. some appropriate launchd-setting or
>> whatever is the intended method for that.)
>
> Note that this doesn't work under SL, but here's what you want to do  
> for Leo:
> sudo launchctl unload -w /System/Library/LaunchDaemon/_____.plist
> sudo launchctl unload -w /System/Library/LaunchAgent/_____.plist
>
>> Looking at this process list there seem not very many candidates
>> hiding the problem,
>
> It's probably not something already running.  It's likely something  
> starting that causes the problem.
>
>> and simply shooting off "UserEventAgent" I
>> finally could reproduce this screen-switching phenomenon willfully.
>> It appears this service is automatically started anew and during
>> this time I always observed the screen-switching.  So it appears in
>> my case the problem is in
>>
>>   /System/Library/UserEventPlugins/iCalAlarmAgent.plugin/
>>
>> as having wiped away this directory these X11->Aqua->X11 unintended
>> switches instantly stopped, and having closely observed the
>> X11-behaviour for few days now since then I can confidently confirm
>> this phenomenon is gone.
>>
>> Here I have to stop and humbly ask anybody with access to the
>> appropriate source code to take a further look at the issue, I am
>> willing to assist with experimenting by running code should this
>> turn out helpful. :-)
>
> The bug is already filed internally.  I'll attach your information  
> to both the Apple and XQuartz reports.
>
> Thanks,
> Jeremy
>
>
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