Debian
bluez package

  1. Bug #1759836
  2. Comment #17

Comment 17 for bug 1759836

Revision history for this message
Wedge009 (wedge009) wrote : Re: systemd-udevd consumes 100% of CPU

Adding some information in case it's useful.

Old - but still useful - Intel Core 2 laptop with discrete Mobility Radeon GPU. I had nvidia packages installed for development purposes years ago, but don't really use them any more. After the upgrade from 17.10 to 18.04 (only performed 2018-05-12, several days after official release), I noticed single-threaded 100% CPU usage from systemd-udevd, with modprobe starting and exiting over and over again. I saw lots of messages complaining about NVIDIA hardware not being found in dmesg output. After uninstalling the nvidia packages and rebooting, the high CPU usage seemed to go away.

So at least on my system, it seems there was a conflict between having nvidia drivers present with no NVIDIA hardware available.