I faced the problem via another reported bug for Gajim which tries to read teh /proc files on startup. https://bugs.launchpad.net/ubuntu/+source/gajim/+bug/1452006
The workaround for the Gajim issue was by restricting access to root as suggested in above bug description. My affected system is an Acer One 722 with Ubuntu Mate 16.04. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to bcmwl in Ubuntu. https://bugs.launchpad.net/bugs/1450825 Title: Reading from /proc/brcm_monitor0 causes lockup of CPU Status in bcmwl package in Ubuntu: Confirmed Bug description: Steps to reproduce: Install and use bcmwl-kernel-source $ cat /proc/brcm_monitor0 What happens: $ dmesg ... Watchdog detected hard LOCKUP on cpu 1 ... Tested on Trusty and Vivid. The file is readable by everyone. At least change this to only root. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/bcmwl/+bug/1450825/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
