On 19.01.2015 14:49, Don Zickus wrote: > On Sun, Jan 18, 2015 at 11:50:38AM +0100, poma wrote: >> >> Salutem >> >> This happened only on thaw from S4 aka hibernate. >> What should be "strange power saving mode" these messages relate!? >> >> [ 208.252986] Uhhuh. NMI received for unknown reason 3d on CPU 0. >> [ 208.252991] Do you have a strange power saving mode enabled? >> [ 208.252992] Dazed and confused, but trying to continue >> >> 3.18.3-200.fc21.x86_64 > > This looks to be an external unknown NMI (unless you can reproduce on > something other than cpu0). > > I would have to know what hardware you have and see the dmesg log after > the resume from hibernate. > > You can open a bz and assign it to me. > > Just attach the dmesg log, lspci and lspci -t output to the bz. > > Though this is most likely a pci device firmware problem. But I can try > to narrow it down. > > Cheers, > Don > Thank you, in the meantime, I've found what causes non-maskable interrupt, [23]d on CPU 0, on resuming S4, on AMD Phenom(tm) II X4 955 Processor. /etc/default/tlp ... # Kernel NMI Watchdog # 0=disable (default, saves power) / 1=enable (for kernel debugging only) NMI_WATCHDOG=0 Toggling to 1, messages no longer appear, NMI_WATCHDOG=1 $ cat /proc/sys/kernel/nmi_watchdog 1 $ sysctl kernel.watchdog kernel.watchdog = 1 Isn't it brilliant. _______________________________________________ kernel mailing list kernel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/kernel
