Discussion:
Screen saver sometimes starts and stops immediately
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Gabriel Zachmann
2018-11-25 21:36:40 UTC
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I have a problem with my screensaver: it gets started as usual by the OS,
it displays the first image for a second (approx),
and then, sometimes (only sometimes), it gets stopped by the OS.

I cannot recall anything I might have changed that might cause this behavior (of course).
Also, I cannot find any hint at a crash or other malfunction of my code.


I have uploaded a section of the log -- copied from Console.app -- here:
https://www.dropbox.com/s/gkjys2yww1jz46n/log_screensaver_exit.txt?dl=0

(Even though it's just 1 minute of log data , I think it is too lengthy to include it here.
I did not want to filter it because I was afraid i might loose valuable information.)

For instance, at 13:52:13.277129 you can see that my screensaver (ArtSaver) got started,
and at 13:52:13.465331 you can see the next message from my screensaver that got logged.
There are some more messages from my code, but nothing unusual, AFAICS.

At 13:52:18.331654, the screensaver gets stopped, but I don't see any reason.
(And as far as I can remember, I did not stop it at that point.)

(The only funny thing is that there is a second "startup" message in the log file at 13:52:14.655737 .
But, IIRC, I have seen that for many years, so I doubt that is the problem.)

If there is any other info I can provide, or if there is a better way t provide the information, please let me know.

Best regards, Gabriel

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Stephane Sudre
2018-11-26 11:11:40 UTC
Permalink
Could it be that your screen saver is trying to access data in a user
folder protected by tccd like ~/Pictures ?

info 13:52:14.333614 +0100 ScreenSaverEngine stop animation (id =
0x7ffe73822800)
default 13:52:14.334610 +0100 tccd MacOS error: -67050
default 13:52:14.335183 +0100 ScreenSaverEngine -[ScreenSaverEngine
startScreenSaver:] -- firstTime 0
info 13:52:14.335516 +0100 ScreenSaverEngine viewWillMoveToWindow was
called with NULL window.
Post by Gabriel Zachmann
I have a problem with my screensaver: it gets started as usual by the OS,
it displays the first image for a second (approx),
and then, sometimes (only sometimes), it gets stopped by the OS.
I cannot recall anything I might have changed that might cause this behavior (of course).
Also, I cannot find any hint at a crash or other malfunction of my code.
https://www.dropbox.com/s/gkjys2yww1jz46n/log_screensaver_exit.txt?dl=0
(Even though it's just 1 minute of log data , I think it is too lengthy to include it here.
I did not want to filter it because I was afraid i might loose valuable information.)
For instance, at 13:52:13.277129 you can see that my screensaver (ArtSaver) got started,
and at 13:52:13.465331 you can see the next message from my screensaver that got logged.
There are some more messages from my code, but nothing unusual, AFAICS.
At 13:52:18.331654, the screensaver gets stopped, but I don't see any reason.
(And as far as I can remember, I did not stop it at that point.)
(The only funny thing is that there is a second "startup" message in the log file at 13:52:14.655737 .
But, IIRC, I have seen that for many years, so I doubt that is the problem.)
If there is any other info I can provide, or if there is a better way t provide the information, please let me know.
Best regards, Gabriel
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