I'm seeing the same issue on 3.18.6-1-ARCH. [samer@archbox ~]$ sudo powertop --auto-tune Loaded 34 prior measurements Cannot load from file /var/cache/powertop/saved_parameters.powertop RAPL device for cpu 0 RAPL Using PowerCap Sysfs : Domain Mask f RAPL device for cpu 0 RAPL Using PowerCap Sysfs : Domain Mask f RAPL device for cpu 0 RAPL Using PowerCap Sysfs : Domain Mask f Devfreq not enabled Cannot load from file /var/cache/powertop/saved_parameters.powertop unknown op '{' To show power estimates do 263 measurement(s) connected to battery onlyLeaving PowerTOP *** Error in `powertop': corrupted double-linked list: 0x0000000000fbceb0 *** Any idea what's causing this?