Hi Ivo, Thanks for the report! We have come across a similar issue with mainline kernel 5.0-rc6 and this patch https://lkml.org/lkml/2019/2/12/452 caused the segfault(failed to mmap with 12). I am not sure if 4.20 kernel you are using has this fix. Could you please try the fix mentioned in the link above if that patch is made it to 4.20. We will gather more information on this and will get back to you. Thanks, Gayatri From: PowerTop [mailto:powertop-bounces@lists.01.org] On Behalf Of Ivo Nenchev Sent: Wednesday, February 20, 2019 1:51 AM To: powertop(a)lists.01.org Subject: [Powertop] issue with powertop, linux kernel 4.20 and OpenSuse After upgrade of operation system OpenSuse Tumbleweed to the last version and after upgrade kernel to 4.20 I received an issue with powertop. After command : systemctl enable powertop && systemctl start powertop I received issue with follow text : powertop.service - Extend the battery life of laptop Loaded: loaded (/usr/lib/systemd/system/powertop.service; enabled; vendor preset: disabled) Active: failed (Result: core-dump) since Wed 2019-02-13 23:07:48 EET; 5s ago Process: 15964 ExecStart=/usr/sbin/powertop --auto-tune (code=dumped, signal=SEGV) Main PID: 15964 (code=dumped, signal=SEGV) Feb 13 23:07:47 linux-qx0s powertop[15964]: Devfreq not enabled Feb 13 23:07:47 linux-qx0s powertop[15964]: glob returned GLOB_ABORTED Feb 13 23:07:47 linux-qx0s powertop[15964]: failed to mmap with 12 (Не може да се задели памет) Feb 13 23:07:47 linux-qx0s powertop[15964]: failed to mmap with 12 (Не може да се задели памет) Feb 13 23:07:47 linux-qx0s powertop[15964]: failed to mmap with 12 (Не може да се задели памет) Feb 13 23:07:47 linux-qx0s powertop[15964]: failed to mmap with 12 (Не може да се задели памет) Feb 13 23:07:47 linux-qx0s powertop[15964]: failed to mmap with 12 (Не може да се задели памет) Feb 13 23:07:48 linux-qx0s systemd[1]: powertop.service: Main process exited, code=dumped, status=11/SEGV Feb 13 23:07:48 linux-qx0s systemd[1]: powertop.service: Failed with result 'core-dump'. Feb 13 23:07:48 linux-qx0s systemd[1]: Failed to start Extend the battery life of laptop. p.s. The version of the PowerTop is 2.10