Hello, I recently updated my Gentoo linux kernel from 3.8.18 to 3.10.7. powertop now hangs while starting up. "strace" shows that powertop is reading the contents of "/proc/timer_list" over and over (but with no "seek" call, which is weird to me). ostara ~ # powertop --version powertop version 1.13 ostara ~ # uname -r 3.10.7-gentoo ostara ~ # zgrep TIMER /proc/config.gz CONFIG_HIGH_RES_TIMERS=y CONFIG_TIMERFD=y CONFIG_OPROFILE_NMI_TIMER=y CONFIG_HPET_TIMER=y # CONFIG_X86_PM_TIMER is not set CONFIG_NETFILTER_XT_TARGET_IDLETIMER=m # CONFIG_HW_RANDOM_TIMERIOMEM is not set # CONFIG_HANGCHECK_TIMER is not set # CONFIG_PPS_CLIENT_KTIMER is not set CONFIG_SND_TIMER=m # CONFIG_SND_HRTIMER is not set CONFIG_TIMER_STATS=y ostara ~ # wc /proc/timer_list 387 1569 16282 /proc/timer_list ostara ~ # strace -e\!read powertop (tailing...) open("/proc/interrupts", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcfdd7c3000 open("/proc/timer_list", O_RDONLY) = 4 fstat(4, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcfdd7c2000 ^CProcess 22238 detached Now run "strace" again, but without the "-e\!read" and watch it read fd #4 over and over and over again. If you need any additional info, please let me know.