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Hash matches budto ukazovalo na nejaky radek v kernelu (muzu doplnit, pokud vas to bude zajimat), nebo na LNXSYSTM:0, nebo jen device, ktere neexistuje (nenasel jsem v /sys). Nekdy mi to ani zadny hash matches nevyhodi i prestoze dam:

echo 1>/sys/power/pm_trace .

Nize viz priklad jednoho z poslednich. Zajimave je, ze je tam vypis "PM: Resume from disk failed.", prestoze jsem hibernate (ci suspend to disk) nevolal.

...
[    0.809112] PM: Resume from disk failed.
[    0.809130] registered taskstats version 1
[    0.809481]   Magic number: 15:422:472
[    0.809560] acpi LNXSYSTM:00: hash matches
[    0.809600] rtc_cmos 00:02: setting system clock to 2011-02-09 08:29:13 UTC (1297240153)
...

Nize je relevantni vystup dmesg po: echo core >/sys/power/pm_test;echo mem >/sys/power/state

[ 2131.795624] PM: Syncing filesystems ... done.
[ 2132.244299] PM: Preparing system for mem sleep
[ 2132.446082] mmc0: card b368 removed
[ 2132.447814] Freezing user space processes ... (elapsed 0.01 seconds) done.
[ 2132.459147] Freezing remaining freezable tasks ... (elapsed 0.01 seconds) done.
[ 2132.470145] PM: Entering mem sleep
[ 2132.470186] Suspending console(s) (use no_console_suspend to debug)
[ 2132.470583] sd 0:0:0:0: [sda] Synchronizing SCSI cache
[ 2132.470778] sd 0:0:0:0: [sda] Stopping disk
[ 2132.947294] btusb_intr_complete: hci0 urb ffff880072fc3cc0 failed to resubmit (1)
[ 2132.948277] btusb_bulk_complete: hci0 urb ffff8800675cd240 failed to resubmit (1)
[ 2132.949274] btusb_bulk_complete: hci0 urb ffff8800675cd3c0 failed to resubmit (1)
[ 2132.968387] ACPI handle has no context!
[ 2132.968702] rt61pci 0000:05:09.0: PCI INT A disabled
[ 2132.968715] ACPI handle has no context!
[ 2132.979168] ACPI handle has no context!
[ 2132.979178] sdhci-pci 0000:05:04.2: PCI INT A disabled
[ 2132.979189] ACPI handle has no context!
[ 2132.990125] ACPI handle has no context!
[ 2133.280062] radeon 0000:01:05.0: PCI INT A disabled
[ 2133.493156] HDA Intel 0000:00:14.2: PCI INT A disabled
[ 2133.504211] pata_atiixp 0000:00:14.1: PCI INT A disabled
[ 2133.504250] ehci_hcd 0000:00:13.2: PCI INT A disabled
[ 2133.504266] ohci_hcd 0000:00:13.1: PCI INT A disabled
[ 2133.504281] ohci_hcd 0000:00:13.0: PCI INT A disabled
[ 2133.504625] sata_sil 0000:00:12.0: PCI INT A disabled
[ 2133.504812] PM: suspend of devices complete after 1034.331 msecs
[ 2133.505120] r8169 0000:04:00.0: PME# enabled
[ 2133.505145] pcieport 0000:00:07.0: wake-up capability enabled by ACPI
[ 2133.527176] PM: late suspend of devices complete after 22.345 msecs
[ 2133.527344] ACPI: Preparing to enter system sleep state S3
[ 2133.528283] PM: Saving platform NVS memory
[ 2133.550937] Disabling non-boot CPUs ...
[ 2133.551009] suspend debug: Waiting for 5 seconds.
[ 2133.551229] ACPI: Waking up from system sleep state S3
[ 2133.552217] pcieport 0000:00:07.0: restoring config space at offset 0x1 (was 0x100107, writing 0x40100107)
[ 2133.552278] sata_sil 0000:00:12.0: restoring config space at offset 0x1 (was 0x2b00103, writing 0x2b00107)
[ 2133.563051] ehci_hcd 0000:00:13.2: BAR 0: set to [mem 0xffefc000-0xffefcfff] (PCI address [0xffefc000-0xffefcfff]
[ 2133.563101] ehci_hcd 0000:00:13.2: restoring config space at offset 0x1 (was 0x2b00000, writing 0x2b00113)
[ 2133.563209] pata_atiixp 0000:00:14.1: restoring config space at offset 0x1 (was 0x2300001, writing 0x2300005)
[ 2133.574045] HDA Intel 0000:00:14.2: BAR 0: set to [mem 0xffef8000-0xffefbfff 64bit] (PCI address [0xffef8000-0xffefbfff]
[ 2133.574069] HDA Intel 0000:00:14.2: restoring config space at offset 0xf (was 0x0, writing 0x3)
[ 2133.574101] HDA Intel 0000:00:14.2: restoring config space at offset 0x3 (was 0x0, writing 0xf010)
[ 2133.574114] HDA Intel 0000:00:14.2: restoring config space at offset 0x1 (was 0x4100000, writing 0x4100002)
[ 2133.585037] radeon 0000:01:05.0: BAR 0: set to [mem 0xd0000000-0xd7ffffff pref] (PCI address [0xd0000000-0xd7ffffff]
[ 2133.585049] radeon 0000:01:05.0: BAR 1: set to [io  0x6800-0x68ff] (PCI address [0x6800-0x68ff]
[ 2133.585059] radeon 0000:01:05.0: BAR 2: set to [mem 0xff2f0000-0xff2fffff] (PCI address [0xff2f0000-0xff2fffff]
[ 2133.585083] radeon 0000:01:05.0: restoring config space at offset 0x1 (was 0x2b00103, writing 0x2b00107)
[ 2133.596039] r8169 0000:04:00.0: BAR 0: set to [io  0x8800-0x88ff] (PCI address [0x8800-0x88ff]
[ 2133.596056] r8169 0000:04:00.0: BAR 2: set to [mem 0xffbff000-0xffbfffff 64bit] (PCI address [0xffbff000-0xffbfffff]
[ 2133.596118] r8169 0000:04:00.0: restoring config space at offset 0x1 (was 0x100000, writing 0x100007)
[ 2133.607040] firewire_ohci 0000:05:04.0: BAR 0: set to [mem 0xffcff000-0xffcfffff] (PCI address [0xffcff000-0xffcfffff]
[ 2133.607054] firewire_ohci 0000:05:04.0: BAR 1: set to [mem 0xffcfe800-0xffcfefff] (PCI address [0xffcfe800-0xffcfefff]
[ 2133.607075] firewire_ohci 0000:05:04.0: restoring config space at offset 0xf (was 0x100, writing 0x107)
[ 2133.607111] firewire_ohci 0000:05:04.0: restoring config space at offset 0x3 (was 0x800000, writing 0x80f810)
[ 2133.607126] firewire_ohci 0000:05:04.0: restoring config space at offset 0x1 (was 0x2100080, writing 0x2180117)
[ 2133.618040] sdhci-pci 0000:05:04.2: BAR 0: set to [mem 0xffcfe400-0xffcfe4ff] (PCI address [0xffcfe400-0xffcfe4ff]
[ 2133.618061] sdhci-pci 0000:05:04.2: restoring config space at offset 0xf (was 0x1ff, writing 0x107)
[ 2133.618099] sdhci-pci 0000:05:04.2: restoring config space at offset 0x3 (was 0x0, writing 0xf810)
[ 2133.618114] sdhci-pci 0000:05:04.2: restoring config space at offset 0x1 (was 0x4100000, writing 0x4100102)
[ 2133.629040] rt61pci 0000:05:09.0: BAR 0: set to [mem 0xffcf0000-0xffcf7fff] (PCI address [0xffcf0000-0xffcf7fff]
[ 2133.629092] rt61pci 0000:05:09.0: restoring config space at offset 0x1 (was 0x4100113, writing 0x4100117)
[ 2133.629205] PM: early resume of devices complete after 77.097 msecs
[ 2133.830423] sata_sil 0000:00:12.0: PCI INT A -> GSI 22 (level, low) -> IRQ 22
[ 2133.831128] ohci_hcd 0000:00:13.0: PCI INT A -> GSI 19 (level, low) -> IRQ 19
[ 2133.852082] ohci_hcd 0000:00:13.1: PCI INT A -> GSI 19 (level, low) -> IRQ 19
[ 2133.873066] ehci_hcd 0000:00:13.2: PCI INT A -> GSI 19 (level, low) -> IRQ 19
[ 2133.873154] pata_atiixp 0000:00:14.1: PCI INT A -> GSI 16 (level, low) -> IRQ 16
[ 2133.876579] HDA Intel 0000:00:14.2: PCI INT A -> GSI 16 (level, low) -> IRQ 16
[ 2133.888681] radeon 0000:01:05.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
[ 2133.899052] [drm] radeon: 2 quad pipes, 1 z pipes initialized.
[ 2133.899826] [drm] radeon: ring at 0x0000000080000000
[ 2133.899851] [drm] ring test succeeded in 1 usecs
[ 2133.899872] [drm] ib test succeeded in 0 usecs
[ 2134.005419] pcieport 0000:00:07.0: wake-up capability disabled by ACPI
[ 2134.005431] r8169 0000:04:00.0: PME# disabled
[ 2134.011093] r8169 0000:04:00.0: eth0: link down
[ 2134.040085] ata3.00: ACPI cmd ef/03:0c:00:00:00:a0 (SET FEATURES) filtered out
[ 2134.040095] ata3.00: ACPI cmd ef/03:42:00:00:00:a0 (SET FEATURES) filtered out
[ 2134.046645] ata3.00: configured for UDMA/33
[ 2134.062104] firewire_core: skipped bus generations, destroying all nodes
[ 2134.062135] sdhci-pci 0000:05:04.2: PCI INT A -> GSI 20 (level, low) -> IRQ 20
[ 2134.062180] rt61pci 0000:05:09.0: PCI INT A -> GSI 22 (level, low) -> IRQ 22
[ 2134.142083] ata2: SATA link down (SStatus 0 SControl 310)
[ 2134.142162] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
[ 2134.145389] ata1.00: ACPI cmd ef/03:46:00:00:00:a0 (SET FEATURES) filtered out
[ 2134.263180] sd 0:0:0:0: [sda] Starting disk
[ 2134.563102] firewire_core: rediscovered device fw0
[ 2136.187641] ata1.00: configured for UDMA/100
[ 2136.218340] PM: resume of devices complete after 2589.079 msecs
[ 2136.301493] PM: Finishing wakeup.
[ 2136.301499] Restarting tasks ... done.
[ 2136.414690] video LNXVIDEO:00: Restoring backlight state
[ 2136.603337] mmc0: new SDHC card at address b368
[ 2136.612991] mmcblk0: mmc0:b368 SDC   3.72 GiB 
[ 2136.631475]  mmcblk0: p1
[ 2140.279961] SELinux: initialized (dev mmcblk0p1, type fuseblk), uses genfs_contexts

Zacinam se domnivat, ze to bude neco s tim mym BIOSem, protoze jsem o tom u Redhat vyplnil bug a prestoze jsem se snazil vse otestovat a oreportovat, nikdo se na to ani neozval . Jen si chci byt jisty, ze je to vubec mozne.