I also have the same issue. By killing fwupd I was able to temporarily
stop the CPU usage. Manually restarting does not cause CPU usage to
spike up again. Attached is the output of fwupd after manually
restarting with,
> sudo /usr/lib/x86_64-linux-gnu/fwupd/fwupd -v
Here's my system info,
> sudo dmidecode | grep 'System Information' --after-context=10
System Information
Manufacturer: LENOVO
Product Name: 20HRCTO1WW
Version: ThinkPad X1 Carbon 5th
Serial Number: PF0QD769
UUID: 5EE5824C-23BB-11B2-A85C-C97143E41984
Wake-up Type: Power Switch
SKU Number: LENOVO_MT_20HR_BU_Think_FM_ThinkPad X1 Carbon 5th
Family: ThinkPad X1 Carbon 5th
** Attachment added: "fwupd.log"
https://bugs.launchpad.net/ubuntu/+source/appstream-glib/+bug/1707110/+attachment/4959436/+files/fwupd.log
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https://bugs.launchpad.net/bugs/1707110
Title:
fwupd is consuming 100% of CPU in an upto date Ubuntu 16.04
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