nejde hibernace

ahoj, nejde mi hibernace v arch.linuxu s jádrem 3.11

dám z nabídky hibernace, nic se nestane, pak na 5s zatuhne PC (zápis na swap) a pak se obnoví obrazovka a nic se nestane.

mám na disku partition 1 -ext4, kde je celý systém. na něm je i /swapfajl ,který služí jako swap. Proč všask hibernce nejde?

dmesg:

PM: Hibernation mode set to 'platform'
PM: Marking nosave pages: [mem 0x0009f000-0x000fffff]
PM: Marking nosave pages: [mem 0x5b7ee000-0x7ea73fff]
PM: Basic memory bitmaps created
PM: Syncing filesystems ... done.
Freezing user space processes ... (elapsed 0.001 seconds) done.
PM: Preallocating image memory... done (allocated 137331 pages)
PM: Allocated 549324 kbytes in 0.22 seconds (2496.92 MB/s)
Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
Suspending console(s) (use no_console_suspend to debug)
snd_hda_intel 0000:00:1b.0: power state changed by ACPI to D3cold
PM: freeze of devices complete after 246.720 msecs
PM: late freeze of devices complete after 0.722 msecs
PM: noirq freeze of devices complete after 1.200 msecs
ACPI: Preparing to enter system sleep state S4
PM: Saving platform NVS memory
Disabling non-boot CPUs ...
smpboot: CPU 1 is now offline
smpboot: CPU 2 is now offline
smpboot: CPU 3 is now offline
PM: Creating hibernation image:
PM: Need to copy 136688 pages
PM: Normal pages needed: 136688 + 1024, available pages: 240892
PM: Hibernation image created (136688 pages copied)
CPU0: Thermal monitoring handled by SMI
Enabling non-boot CPUs ...
smpboot: Booting Node 0 Processor 1 APIC 0x1
Disabled fast string operations
CPU1: Thermal monitoring handled by SMI
CPU1 is up
smpboot: Booting Node 0 Processor 2 APIC 0x2
Disabled fast string operations
CPU2: Thermal monitoring handled by SMI
CPU2 is up
smpboot: Booting Node 0 Processor 3 APIC 0x3
Disabled fast string operations
CPU3: Thermal monitoring handled by SMI
CPU3 is up
ACPI: Waking up from system sleep state S4
acpi LNXPOWER:05: Turning ON
PM: noirq thaw of devices complete after 0.772 msecs
PM: early thaw of devices complete after 0.841 msecs
pci 0000:00:1e.0: setting latency timer to 64
ahci 0000:00:1f.2: setting latency timer to 64
snd_hda_intel 0000:00:1b.0: power state changed by ACPI to D0
snd_hda_intel 0000:00:1b.0: irq 44 for MSI/MSI-X
ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
ata1.00: ACPI cmd 00/00:00:00:00:00:a0 (NOP) rejected by device (Stat=0x51 Err=0x04)
ata1.00: ACPI cmd 00/00:00:00:00:00:a0 (NOP) rejected by device (Stat=0x51 Err=0x04)
ata1.00: configured for UDMA/133
PM: thaw of devices complete after 375.335 msecs
PM: writing image.
PM: Using 3 thread(s) for compression.
sing and saving image data (136955 pages)...
PM: Image saving progress:   0%
PM: Image saving progress:  10%
PM: Image saving progress:  20%
PM: Image saving progress:  30%
PM: Image saving progress:  40%
PM: Image saving progress:  50%
PM: Image saving progress:  60%
PM: Image saving progress:  70%
PM: Image saving progress:  80%
PM: Image saving progress:  90%
PM: Image saving progress: 100%
PM: Image saving done.
PM: Wrote 547820 kbytes in 5.83 seconds (93.96 MB/s)
PM: S
PM: Swap header not found!
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Restarting tasks ... done.
PM: Basic memory bitmaps freed
video LNXVIDEO:01: Restoring backlight state
sky2 0000:02:00.0 ens1: enabling interface
IPv6: ADDRCONF(NETDEV_UP): ens1: link is not ready
sky2 0000:02:00.0 ens1: Link is up at 100 Mbps, full duplex, flow control both
IPv6: ADDRCONF(NETDEV_CHANGE): ens1: link becomes ready