Hogged CPU error

written by Admin

Posted on 2024-10-14

Problem

My virtualized (but also on bare metal) Ubuntu system freezes and/or is slow, in system logs I see "...hogged CPU for 10000us 4 times..."; how can I recover?

Solution

Disable IPv6 in /etc/default/grub:
GRUB_CMDLINE_LINUX="ipv6.disable=1"

Then run:
# update-grub

If problem persists after reboot, add this line in /etc/modprobe.d/blacklist.conf and reboot again:
blacklist ipv6

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