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I tried to hibernate my system using 

pm-hibernate

and it did hibernate. But on booting up the system, it crashed. I had to hard reboot my system. Next thing I know is my harddisk is full due to uvcydnctrl-udev.log.

Why is there an ever-growing uvcydnctrl-udev.log file filling up my harddisk? Also, can I do something to stop this, or – at least – to keep the file from wasting all my diskspace?

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  • again the same file was created.... somebody please enlighten me on this... out of nowhere my harddisk starts blinking and almost 20GB of this log file is created at /var/log.... what is this ??? how do i stop it? .. i have already deleted two last created using 'sudo rm'
    – nazar2sfive
    May 2, 2016 at 16:00

1 Answer 1

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This is a bug in libwebcam and is not dangerous. You will have to run sudo rm /var/log/uvcdynctrl-udev.log every once in a while, possibly through a shell script and a cron job. This the best thing you can do, until the bug is fixed.

The script

#!/bin/bash
PW = "yourpassword"

echo $PW | sudo -S rm /var/log/uvcdynctrl-udev.log

Save the script as rmlog.sh, make it executable with chmod +x rmlog.sh.

The cron job

Move rmlog.sh to /etc/cron.hourly/ with

sudo mv rmlog.sh /etc/cron.hourly/
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  • DAMN the BUG was reported on 2011....."every once in a while".. huh.. i am thinking of writing a shell script to autorun every 1 hour to check and delete WHATEVER this is....
    – nazar2sfive
    May 3, 2016 at 9:51
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    Please don't write scripts like that one. Never put your password in a plain text file like that! Just use root's crontab instead (sudo crontab -e). But even if you use /etc/cron.hourly, that will run as root so there's no need for sudo so no need to use a password in the script.
    – terdon
    May 13, 2018 at 12:26

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