This is a known bug of powertop itself, see the kown bug section: https://01.org/powertop/downloads/powertop-v2.7-0
"Know Bugs:
We plan to fix these bugs in future releases.
* Problem with traceevent lib it prints string: unknown op '{'. This bug doesn’t impact the correct functionality of PowerTOP."
This is a known bug of powertop itself, see the kown bug section: /01.org/ powertop/ downloads/ powertop- v2.7-0
https:/
"Know Bugs:
We plan to fix these bugs in future releases.
* Problem with traceevent lib it prints string: unknown op '{'. This bug doesn’t impact the correct functionality of PowerTOP."