Read the statement by Michael Teeuw here.
my mirror freezes!
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 @Bugsounet MMM-Logging was also installed after the Mirror freezes. Maybe i can disable the Third Party modules and see if it still freezes?! 
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 of course try ;) 
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 humm, i think to other things… Do you use Raspotify program ? 
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 No i dont - but i used MMM-Spotify but i disabled it because of this freezing problem. But it still freezes… 
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 But there is one suspect thing. 
 When the Mirror freeze, im not able to connect with VNC. But how affect the MM Software the VNC Connection? Maybe there is a Problem with WLAN Connection…?!
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 so continue to disable modules one by one… and default too … to discover the responsible module 
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 @mr_cd : yes but it will not freeze… just display warning 
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 @mr_cd how much swap space do you have? and is used? free -m will show info 
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 @sdetweil  
 if the mirror is running.But lets define the word freeze : I mean the clock is still working - but the modules like wheather or calender ar not updating… 
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 @mr_cd but u also said vnc doesn’t work. 
