On 19.01.2015 14:49, Don Zickus wrote:
On Sun, Jan 18, 2015 at 11:50:38AM +0100, poma wrote:
> 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
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.
Thank you, in the meantime, I've found what causes non-maskable interrupt, d on
CPU 0, on resuming S4,
on AMD Phenom(tm) II X4 955 Processor.
# Kernel NMI Watchdog
# 0=disable (default, saves power) / 1=enable (for kernel debugging only)
Toggling to 1, messages no longer appear,
$ cat /proc/sys/kernel/nmi_watchdog
$ sysctl kernel.watchdog
kernel.watchdog = 1
Isn't it brilliant.