Thanks Kleber, I see now that this is what happens when you check a checkbox (Pre-released updates) and five years later don't even remember it. :-)
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1913853 Title: Ubuntu 16.04 kernel 4.4.0-202 basic commands hanging Status in linux package in Ubuntu: Confirmed Bug description: Hi there, I've updated kernel on my Ubuntu 16.04 from 4.4.0-201-generic to 4.4.0.202-generic today and it broke my system. Basic commands, such as pidof, lsof, ps fax (ps -a works) hang indefinitely and not even root issued kill -KILL will terminate them. Only thing that helps is to kill the shell that started such commands. I had to reboot back to 4.4.0-201, however during shutdown various stop jobs hanged as well and after more than 25 minutes I had to go for hard reboot. My current—NOT BROKEN—kernel has signature (cat /proc/version_signature): Ubuntu 4.4.0-201.233-generic 4.4.247 I am attaching the lspci-vnvn.log, also created with the non-broken kernel. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1913853/+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