pm-hibernate does not turn off system

I'm trying to make pm-hibernate to work on my Ubuntu 14.04 system. When I invoke

sudo pm-hibernate

display turns off and I can't do anything anymore but computer does not turn off. All I have found in logs is:

Mar 17 21:40:25 dmitry-pc kernel: [    0.000000] PM: Registered nosave memory: [mem 0x0009a000-0x0009ffff]
Mar 17 21:40:25 dmitry-pc kernel: [    0.000000] PM: Registered nosave memory: [mem 0x000a0000-0x000effff]
Mar 17 21:40:25 dmitry-pc kernel: [    0.000000] PM: Registered nosave memory: [mem 0x000f0000-0x000fffff]
Mar 17 21:40:25 dmitry-pc kernel: [    0.000000] PM: Registered nosave memory: [mem 0xbfda0000-0xbfdd0fff]
Mar 17 21:40:25 dmitry-pc kernel: [    0.000000] PM: Registered nosave memory: [mem 0xbfdd1000-0xbfdfffff]
Mar 17 21:40:25 dmitry-pc kernel: [    0.000000] PM: Registered nosave memory: [mem 0xbfe00000-0xbfefffff]
Mar 17 21:40:25 dmitry-pc kernel: [    0.000000] PM: Registered nosave memory: [mem 0xbff00000-0xdfffffff]
Mar 17 21:40:25 dmitry-pc kernel: [    0.000000] PM: Registered nosave memory: [mem 0xe0000000-0xefffffff]
Mar 17 21:40:25 dmitry-pc kernel: [    0.000000] PM: Registered nosave memory: [mem 0xf0000000-0xfebfffff]
Mar 17 21:40:25 dmitry-pc kernel: [    0.000000] PM: Registered nosave memory: [mem 0xfec00000-0xffffffff]
Mar 17 21:40:25 dmitry-pc kernel: [    0.000000] PM: Registered nosave memory: [mem 0xb4000000-0xb7ffffff]
Mar 17 21:40:25 dmitry-pc kernel: [    2.683676] PM: Registering ACPI NVS region [mem 0xbfda0000-0xbfdd0fff] (200704 bytes)
Mar 17 21:40:25 dmitry-pc kernel: [    3.887015] PM: Hibernation image not present or could not be loaded.
Mar 18 12:34:48 dmitry-pc kernel: [    0.000000] PM: Registered nosave memory: [mem 0x0009a000-0x0009ffff]
Mar 18 12:34:48 dmitry-pc kernel: [    0.000000] PM: Registered nosave memory: [mem 0x000a0000-0x000effff]
Mar 18 12:34:48 dmitry-pc kernel: [    0.000000] PM: Registered nosave memory: [mem 0x000f0000-0x000fffff]
Mar 18 12:34:48 dmitry-pc kernel: [    0.000000] PM: Registered nosave memory: [mem 0xbfda0000-0xbfdd0fff]
Mar 18 12:34:48 dmitry-pc kernel: [    0.000000] PM: Registered nosave memory: [mem 0xbfdd1000-0xbfdfffff]
Mar 18 12:34:48 dmitry-pc kernel: [    0.000000] PM: Registered nosave memory: [mem 0xbfe00000-0xbfefffff]
Mar 18 12:34:48 dmitry-pc kernel: [    0.000000] PM: Registered nosave memory: [mem 0xbff00000-0xdfffffff]
Mar 18 12:34:48 dmitry-pc kernel: [    0.000000] PM: Registered nosave memory: [mem 0xe0000000-0xefffffff]
Mar 18 12:34:48 dmitry-pc kernel: [    0.000000] PM: Registered nosave memory: [mem 0xf0000000-0xfebfffff]
Mar 18 12:34:48 dmitry-pc kernel: [    0.000000] PM: Registered nosave memory: [mem 0xfec00000-0xffffffff]
Mar 18 12:34:48 dmitry-pc kernel: [    0.000000] PM: Registered nosave memory: [mem 0xb4000000-0xb7ffffff]
Mar 18 12:34:48 dmitry-pc kernel: [    2.683666] PM: Registering ACPI NVS region [mem 0xbfda0000-0xbfdd0fff] (200704 bytes)
Mar 18 12:34:48 dmitry-pc kernel: [    3.867333] PM: Hibernation image not present or could not be loaded.