pm-hibernate não desliga o sistema

Question

Estou tentando fazer o pm-hibernate funcionar no meu sistema Ubuntu 14.04. Quando eu invoco

sudo pm-hibernate

A tela

é desativada e não consigo mais fazer nada, mas o computador não desliga. Tudo que encontrei em logs é:

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.