LinuxQuestions.org - [SOLVED] Unable to suspend or hibernate with a 4.4.0 kernel.

I compiled a 4.4.0 kernel using the oldconfig from the generic 4.1.5 kernel using largely default options and then removing some hardware specific stuff I don't need. However now I can't use pm-suspend or pm-hibernate, it tries to suspend/hibernate and then resumes when its not able to. Any pointers on how to debug this? I have attached my kernel config at a .txt file in case this is my own doing.

This was not present on the 4.3.3 kernel release.

syslog

Code:

Jan 12 05:01:36 Linux kernel: [  646.351808] Freezing of tasks failed after 20.008

 seconds (3 tasks refusing to freeze, wq_busy=0):

Jan 12 05:01:36 Linux kernel: [  646.351837]  ffff8800ce53be08 ffffffff819af4c0 ff

ff8800ca490c40 0000000000000000

Jan 12 05:01:36 Linux kernel: [  646.351842]  ffff8800ca490c40 ffff8800ce53c000 ff

ff8800ca490c40 ffffffff81350990

Jan 12 05:01:36 Linux kernel: [  646.351847]  ffff8802224d5c80 0000000000000000 ff

ff8800ce53be20 ffffffff8174752c

Jan 12 05:01:36 Linux kernel: [  646.351852] Call Trace:

Jan 12 05:01:36 Linux kernel: [  646.351863]  [<ffffffff81350990>] ? xfs_trans_ail

_cursor_first+0x90/0x90

Jan 12 05:01:36 Linux kernel: [  646.351869]  [<ffffffff8174752c>] schedule+0x3c/0

x90

Jan 12 05:01:36 Linux kernel: [  646.351873]  [<ffffffff81350fe0>] xfsaild+0x650/0

x680

Jan 12 05:01:36 Linux kernel: [  646.351878]  [<ffffffff81746d17>] ? __schedule+0x

327/0xb00

Jan 12 05:01:36 Linux kernel: [  646.351882]  [<ffffffff81350990>] ? xfs_trans_ail

_cursor_first+0x90/0x90

Jan 12 05:01:36 Linux kernel: [  646.351886]  [<ffffffff81350990>] ? xfs_trans_ail

_cursor_first+0x90/0x90

Jan 12 05:01:36 Linux kernel: [  646.351892]  [<ffffffff810a3a39>] kthread+0xc9/0x

e0

Jan 12 05:01:36 Linux kernel: [  646.351896]  [<ffffffff810a3970>] ? kthread_worke

r_fn+0x170/0x170

Jan 12 05:01:36 Linux kernel: [  646.351901]  [<ffffffff8174b76f>] ret_from_fork+0x3f/0x70

Jan 12 05:01:36 Linux kernel: [  646.351905]  [<ffffffff810a3970>] ? kthread_worker_fn+0x170/0x170

Jan 12 05:01:36 Linux kernel: [  646.351915]  ffff8800c8c13e08 ffff8802259f9880 ffff8802241b3100 ffff8800cd988990

Jan 12 05:01:36 Linux kernel: [  646.351920]  0000000000000000 ffff8800c8c14000 ffff8802241b3100 ffffffff81350990

Jan 12 05:01:36 Linux kernel: [  646.351931]  ffff8800cd988980 0000000000000000 ffff8800c8c13e20 ffffffff8174752c

Jan 12 05:01:36 Linux kernel: [  646.351936] Call Trace:

Jan 12 05:01:36 Linux kernel: [  646.351940]  [<ffffffff81350990>] ? xfs_trans_ail_cursor_first+0x90/0x90

Jan 12 05:01:36 Linux kernel: [  646.351944]  [<ffffffff8174752c>] schedule+0x3c/0x90

Jan 12 05:01:36 Linux kernel: [  646.351948]  [<ffffffff81350fe0>] xfsaild+0x650/0x680

Jan 12 05:01:36 Linux kernel: [  646.351952]  [<ffffffff81746d17>] ? __schedule+0x327/0xb00

Jan 12 05:01:36 Linux kernel: [  646.351956]  [<ffffffff81350990>] ? xfs_trans_ail_cursor_first+0x90/0x90

Jan 12 05:01:36 Linux kernel: [  646.351960]  [<ffffffff81350990>] ? xfs_trans_ail_cursor_first+0x90/0x90

Jan 12 05:01:36 Linux kernel: [  646.351964]  [<ffffffff810a3a39>] kthread+0xc9/0xe0

Jan 12 05:01:36 Linux kernel: [  646.351968]  [<ffffffff810a3970>] ? kthread_worker_fn+0x170/0x170

Jan 12 05:01:36 Linux kernel: [  646.351973]  [<ffffffff8174b76f>] ret_from_fork+0x3f/0x70

Jan 12 05:01:36 Linux kernel: [  646.351977]  [<ffffffff810a3970>] ? kthread_worker_fn+0x170/0x170

Jan 12 05:01:36 Linux kernel: [  646.351986]  ffff8800c8c37e08 ffff8802259f8000 ffff8802241b4980 ffff8800c8c34000

Jan 12 05:01:36 Linux kernel: [  646.351990]  ffff8802241b4980 ffff8800c8c38000 ffff8802241b4980 0000000000000000

Jan 12 05:01:36 Linux kernel: [  646.351995]  ffff8802224d5880 ffff8800ca5d6800 ffff8800c8c37e20 ffffffff8174752c

Jan 12 05:01:36 Linux kernel: [  646.351999] Call Trace:

Jan 12 05:01:36 Linux kernel: [  646.352003]  [<ffffffff8174752c>] schedule+0x3c/0x90

Jan 12 05:01:36 Linux kernel: [  646.352007]  [<ffffffff81350fe0>] xfsaild+0x650/0x680

Jan 12 05:01:36 Linux kernel: [  646.352011]  [<ffffffff81350990>] ? xfs_trans_ail_cursor_first+0x90/0x90

Jan 12 05:01:36 Linux kernel: [  646.352015]  [<ffffffff81350990>] ? xfs_trans_ail_cursor_first+0x90/0x90

Jan 12 05:01:36 Linux kernel: [  646.352025]  [<ffffffff810a3a39>] kthread+0xc9/0xe0

Jan 12 05:01:36 Linux kernel: [  646.352027]  [<ffffffff810a3970>] ? kthread_worker_fn+0x170/0x170

Jan 12 05:01:36 Linux kernel: [  646.352028]  [<ffffffff8174b76f>] ret_from_fork+0x3f/0x70

Jan 12 05:01:36 Linux kernel: [  646.352030]  [<ffffffff810a3970>] ? kthread_worker_fn+0x170/0x170

Jan 12 05:01:36 Linux kernel: [  646.352041]

Code:

$ lspci 

00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD/ATI] RD890 PCI to PCI bridge (external gfx0 port B) (rev 02)

00:02.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RD890 PCI to PCI bridge (PCI express gpp port B)

00:09.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RD890 PCI to PCI bridge (PCI express gpp port H)

00:0a.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RD890 PCI to PCI bridge (external gfx1 port A)

00:11.0 SATA controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 SATA Controller [AHCI mode] (rev 40)

00:12.0 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI0 Controller

00:12.2 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB EHCI Controller

00:13.0 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI0 Controller

00:13.2 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB EHCI Controller

00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 SMBus Controller (rev 42)

00:14.2 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 Azalia (Intel HDA) (rev 40)

00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 LPC host controller (rev 40)

00:14.4 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 PCI to PCI Bridge (rev 40)

00:14.5 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI2 Controller

00:15.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] SB700/SB800/SB900 PCI to PCI bridge (PCIE port 0)

00:15.2 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] SB900 PCI to PCI bridge (PCIE port 2)

00:16.0 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI0 Controller

00:16.2 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB EHCI Controller

00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 0

00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 1

00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 2

00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 3

00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 4

00:18.5 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 5

01:00.0 VGA compatible controller: NVIDIA Corporation GK110B [GeForce GTX 780 Ti] (rev a1)

01:00.1 Audio device: NVIDIA Corporation GK110 HDMI Audio (rev a1)

02:00.0 USB controller: VIA Technologies, Inc. VL805 USB 3.0 Host Controller (rev 01)

03:00.0 SATA controller: Marvell Technology Group Ltd. 88SE9172 SATA 6Gb/s Controller (rev 12)

05:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 0c)

06:00.0 SATA controller: Marvell Technology Group Ltd. 88SE9172 SATA 6Gb/s Controller (rev 12)

Edit:

dmesg

Code:

[  626.285757] PM: Syncing filesystems ... done.

[  626.342811] Freezing user space processes ... (elapsed 0.001 seconds) done.

[  626.344187] Freezing remaining freezable tasks ... 

[  646.351808] Freezing of tasks failed after 20.008 seconds (3 tasks refusing to freeze, wq_busy=0):

[  646.351830] xfsaild/sda10  S ffff8800ce53be08    0  900      2 0x00000000

[  646.351837]  ffff8800ce53be08 ffffffff819af4c0 ffff8800ca490c40 0000000000000000

[  646.351842]  ffff8800ca490c40 ffff8800ce53c000 ffff8800ca490c40 ffffffff81350990

[  646.351847]  ffff8802224d5c80 0000000000000000 ffff8800ce53be20 ffffffff8174752c

[  646.351852] Call Trace:

[  646.351863]  [<ffffffff81350990>] ? xfs_trans_ail_cursor_first+0x90/0x90

[  646.351869]  [<ffffffff8174752c>] schedule+0x3c/0x90

[  646.351873]  [<ffffffff81350fe0>] xfsaild+0x650/0x680

[  646.351878]  [<ffffffff81746d17>] ? __schedule+0x327/0xb00

[  646.351882]  [<ffffffff81350990>] ? xfs_trans_ail_cursor_first+0x90/0x90

[  646.351886]  [<ffffffff81350990>] ? xfs_trans_ail_cursor_first+0x90/0x90

[  646.351892]  [<ffffffff810a3a39>] kthread+0xc9/0xe0

[  646.351896]  [<ffffffff810a3970>] ? kthread_worker_fn+0x170/0x170

[  646.351901]  [<ffffffff8174b76f>] ret_from_fork+0x3f/0x70

[  646.351905]  [<ffffffff810a3970>] ? kthread_worker_fn+0x170/0x170

[  646.351910] xfsaild/sda11  S ffff8800c8c13e08    0  908      2 0x00000000

[  646.351915]  ffff8800c8c13e08 ffff8802259f9880 ffff8802241b3100 ffff8800cd988990

[  646.351920]  0000000000000000 ffff8800c8c14000 ffff8802241b3100 ffffffff81350990

[  646.351931]  ffff8800cd988980 0000000000000000 ffff8800c8c13e20 ffffffff8174752c

[  646.351936] Call Trace:

[  646.351940]  [<ffffffff81350990>] ? xfs_trans_ail_cursor_first+0x90/0x90

[  646.351944]  [<ffffffff8174752c>] schedule+0x3c/0x90

[  646.351948]  [<ffffffff81350fe0>] xfsaild+0x650/0x680

[  646.351952]  [<ffffffff81746d17>] ? __schedule+0x327/0xb00

[  646.351956]  [<ffffffff81350990>] ? xfs_trans_ail_cursor_first+0x90/0x90

[  646.351960]  [<ffffffff81350990>] ? xfs_trans_ail_cursor_first+0x90/0x90

[  646.351964]  [<ffffffff810a3a39>] kthread+0xc9/0xe0

[  646.351968]  [<ffffffff810a3970>] ? kthread_worker_fn+0x170/0x170

[  646.351973]  [<ffffffff8174b76f>] ret_from_fork+0x3f/0x70

[  646.351977]  [<ffffffff810a3970>] ? kthread_worker_fn+0x170/0x170

[  646.351981] xfsaild/sda14  S ffff8800c8c37e08    0  916      2 0x00000000

[  646.351986]  ffff8800c8c37e08 ffff8802259f8000 ffff8802241b4980 ffff8800c8c34000

[  646.351990]  ffff8802241b4980 ffff8800c8c38000 ffff8802241b4980 0000000000000000

[  646.351995]  ffff8802224d5880 ffff8800ca5d6800 ffff8800c8c37e20 ffffffff8174752c

[  646.351999] Call Trace:

[  646.352003]  [<ffffffff8174752c>] schedule+0x3c/0x90

[  646.352007]  [<ffffffff81350fe0>] xfsaild+0x650/0x680

[  646.352011]  [<ffffffff81350990>] ? xfs_trans_ail_cursor_first+0x90/0x90

[  646.352015]  [<ffffffff81350990>] ? xfs_trans_ail_cursor_first+0x90/0x90

[  646.352025]  [<ffffffff810a3a39>] kthread+0xc9/0xe0

[  646.352027]  [<ffffffff810a3970>] ? kthread_worker_fn+0x170/0x170

[  646.352028]  [<ffffffff8174b76f>] ret_from_fork+0x3f/0x70

[  646.352030]  [<ffffffff810a3970>] ? kthread_worker_fn+0x170/0x170



[  646.352042] Restarting kernel threads ... done.

[  646.352271] Restarting tasks ... done.

pm-suspend.log

Code:

Initial commandline parameters: 

Tue Jan 12 05:01:15 PST 2016: Running hooks for suspend.

Running hook /usr/lib64/pm-utils/sleep.d/00logging suspend suspend:

Linux Akita 4.4.0 #1 SMP PREEMPT Mon Jan 11 08:57:44 PST 2016 x86_64 AMD FX(tm)-6350 Six-Core Processor AuthenticAMD GNU/Linux

Module                  Size  Used by

cfg80211              446974  0

rfkill                15562  1 cfg80211

fuse                  80238  1

joydev                10151  0

nouveau              1401973  2

video                  24840  1 nouveau

ttm                    71260  1 nouveau

drm_kms_helper        96426  1 nouveau

drm                  271956  5 ttm,drm_kms_helper,nouveau

agpgart                26356  3 drm,ttm,nouveau

kvm_amd                53779  0

mxm_wmi                1699  1 nouveau

i2c_dev                5819  0

evdev                  13034  21

i2c_algo_bit            5456  1 nouveau

kvm                  444180  1 kvm_amd

fb_sys_fops            1506  1 drm_kms_helper

snd_hda_codec_realtek    55526  1

snd_hda_codec_hdmi    38014  1

snd_hda_codec_generic    56790  1 snd_hda_codec_realtek

k10temp                3188  0

fam15h_power            3070  0

syscopyarea            3326  1 drm_kms_helper

sysfillrect            3818  1 drm_kms_helper

sysimgblt              2367  1 drm_kms_helper

snd_hda_intel          24429  0

snd_hda_codec          89273  4 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_intel

snd_hda_core          39474  5 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel

irqbypass              2872  1 kvm

hwmon                  3250  3 fam15h_power,k10temp,nouveau

snd_hwdep              6250  1 snd_hda_codec

snd_pcm                79560  4 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_hda_core

crct10dif_pclmul        4580  0

xhci_pci                4458  0

psmouse              104073  0

serio_raw              4785  0

crc32_pclmul            3059  0

snd_timer              18977  1 snd_pcm

xhci_hcd              111580  1 xhci_pci

crc32c_intel          13318  0

ohci_pci                3336  0

wmi                    7778  2 mxm_wmi,nouveau

r8168                475441  0

ehci_pci                3999  0

snd                    58733  7 snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel

8250_fintek            2957  0

shpchp                24466  0

ohci_hcd              28028  1 ohci_pci

i2c_piix4              8793  0

i2c_core              38903  6 drm,i2c_dev,i2c_piix4,drm_kms_helper,i2c_algo_bit,nouveau

soundcore              5475  1 snd

tpm_infineon            7782  0

ehci_hcd              42560  1 ehci_pci

button                  4948  1 nouveau

acpi_cpufreq            7202  0

tpm_tis                10525  0

tpm                    30897  2 tpm_tis,tpm_infineon

processor              24183  7 acpi_cpufreq

loop                  19834  0

hid_generic            1385  0

usbhid                36651  0

hid                  101351  2 hid_generic,usbhid

              total        used        free      shared  buff/cache  available

Mem:        8198208      664544      66316        4612    7467348    7463948

Swap:      8388604      121160    8267444

/usr/lib64/pm-utils/sleep.d/00logging suspend suspend: success.



Running hook /usr/lib64/pm-utils/sleep.d/00powersave suspend suspend:

/usr/lib64/pm-utils/sleep.d/00powersave suspend suspend: success.



Running hook /usr/lib64/pm-utils/sleep.d/01grub suspend suspend:

/usr/lib64/pm-utils/sleep.d/01grub suspend suspend: not applicable.



Running hook /usr/lib64/pm-utils/sleep.d/49bluetooth-generic suspend suspend:

/usr/lib64/pm-utils/sleep.d/49bluetooth-generic suspend suspend: success.



Running hook /usr/lib64/pm-utils/sleep.d/49bluetooth-ibm suspend suspend:

/usr/lib64/pm-utils/sleep.d/49bluetooth-ibm suspend suspend: not applicable.



Running hook /etc/pm/sleep.d/66screenlock suspend suspend:

/etc/pm/sleep.d/66screenlock suspend suspend: success.



Running hook /usr/lib64/pm-utils/sleep.d/75modules suspend suspend:

/usr/lib64/pm-utils/sleep.d/75modules suspend suspend: not applicable.



Running hook /usr/lib64/pm-utils/sleep.d/90clock suspend suspend:

/usr/lib64/pm-utils/sleep.d/90clock suspend suspend: not applicable.



Running hook /usr/lib64/pm-utils/sleep.d/94cpufreq suspend suspend:

/usr/lib64/pm-utils/sleep.d/94cpufreq suspend suspend: success.



Running hook /usr/lib64/pm-utils/sleep.d/95led suspend suspend:

/usr/lib64/pm-utils/sleep.d/95led suspend suspend: not applicable.



Running hook /usr/lib64/pm-utils/sleep.d/98video-quirk-db-handler suspend suspend:

xscreensaver-command: activating and locking.



Kernel modesetting video driver detected, not using quirks.

/usr/lib64/pm-utils/sleep.d/98video-quirk-db-handler suspend suspend: success.



Running hook /usr/lib64/pm-utils/sleep.d/99video suspend suspend:

kernel.acpi_video_flags = 0

/usr/lib64/pm-utils/sleep.d/99video suspend suspend: success.



Tue Jan 12 05:01:16 PST 2016: performing suspend

/usr/lib64/pm-utils/pm-functions: line 301: echo: write error: Device or resource busy

Tue Jan 12 05:01:36 PST 2016: Awake.

Tue Jan 12 05:01:36 PST 2016: Running hooks for resume

Running hook /usr/lib64/pm-utils/sleep.d/99video resume suspend:

/usr/lib64/pm-utils/sleep.d/99video resume suspend: success.



Running hook /usr/lib64/pm-utils/sleep.d/98video-quirk-db-handler resume suspend:

/usr/lib64/pm-utils/sleep.d/98video-quirk-db-handler resume suspend: success.



Running hook /usr/lib64/pm-utils/sleep.d/95led resume suspend:

/usr/lib64/pm-utils/sleep.d/95led resume suspend: not applicable.



Running hook /usr/lib64/pm-utils/sleep.d/94cpufreq resume suspend:

/usr/lib64/pm-utils/sleep.d/94cpufreq resume suspend: success.



Running hook /usr/lib64/pm-utils/sleep.d/90clock resume suspend:

/usr/lib64/pm-utils/sleep.d/90clock resume suspend: not applicable.



Running hook /usr/lib64/pm-utils/sleep.d/75modules resume suspend:

Reloaded unloaded modules.

/usr/lib64/pm-utils/sleep.d/75modules resume suspend: success.



Running hook /etc/pm/sleep.d/66screenlock resume suspend:

/etc/pm/sleep.d/66screenlock resume suspend: success.



Running hook /usr/lib64/pm-utils/sleep.d/49bluetooth-ibm resume suspend:

/usr/lib64/pm-utils/sleep.d/49bluetooth-ibm resume suspend: not applicable.



Running hook /usr/lib64/pm-utils/sleep.d/49bluetooth-generic resume suspend:

/usr/lib64/pm-utils/sleep.d/49bluetooth-generic resume suspend: success.



Running hook /usr/lib64/pm-utils/sleep.d/01grub resume suspend:

/usr/lib64/pm-utils/sleep.d/01grub resume suspend: not applicable.



Running hook /usr/lib64/pm-utils/sleep.d/00powersave resume suspend:

/usr/lib64/pm-utils/sleep.d/00powersave resume suspend: success.



Running hook /usr/lib64/pm-utils/sleep.d/00logging resume suspend:

/usr/lib64/pm-utils/sleep.d/00logging resume suspend: success.



Tue Jan 12 05:01:36 PST 2016: Finished.

/usr/lib64/pm-utils/pm-functions

Code:

        

check_suspend() { [ -n "$SUSPEND_MODULE" ]; }

check_hibernate() { [ -n "$HIBERNATE_MODULE" ]; }

check_suspend_hybrid() { [ -n "$SUSPEND_HYBRID_MODULE" ]; }



# allow autodetection of sleep methods

if [ "$SLEEP_MODULE" = "auto" ]; then

    SLEEP_MODULE="tuxonice uswsusp"

fi



for mod in $SLEEP_MODULE; do

    mod="${PM_UTILS_LIBDIR}/module.d/${mod}"

    [ -f "$mod" ] || continue

    . "$mod"

done



# always fall back to kernel methods if nothing else was declared



if [ -z "$SUSPEND_MODULE" ]; then

        if grep -q mem /sys/power/state; then

                SUSPEND_MODULE="kernel"

                do_suspend() { echo -n "mem" >/sys/power/state; }      ####### Line 301

        elif [ -c /dev/pmu ] && pm-pmu --check; then

                SUSPEND_MODULE="kernel"

                do_suspend() { pm-pmu --suspend; }

        elif grep -q standby /sys/power/state; then

                SUSPEND_MODULE="kernel"

                do_suspend() { echo -n "standby" >/sys/power/state; }

        fi

fi



if [ -z "$HIBERNATE_MODULE" ] && \n        [ -f /sys/power/disk ] && \n        grep -q disk /sys/power/state; then

        HIBERNATE_MODULE="kernel"

        do_hibernate()

        {

                [ -n "${HIBERNATE_MODE}" ] && \n                grep -qw "${HIBERNATE_MODE}" /sys/power/disk && \n                HIBERNATE_MODE_SAVE=$(cat /sys/power/disk) && \n                HIBERNATE_MODE_SAVE="${HIBERNATE_MODE_SAVE##*[}" && \n                HIBERNATE_MODE_SAVE="${HIBERNATE_MODE_SAVE%%]*}" && \n                echo -n "${HIBERNATE_MODE}" > /sys/power/disk

                echo -n "disk" > /sys/power/state

                RET=$?

                echo -n "$HIBERNATE_MODE_SAVE" > /sys/power/disk

                return "$RET"

        }

fi



# for kernels that support suspend to both (i.e. hybrid suspend)

# since kernel 3.6

if [ -z "$SUSPEND_HYBRID_MODULE" ] && \n        [ -f /sys/power/disk ] && \n        grep -q disk /sys/power/state && \n        grep -q suspend /sys/power/disk; then

        SUSPEND_HYBRID_MODULE="kernel"

        do_suspend_hybrid()

        {

                HIBERNATE_MODE="suspend"

                do_hibernate

        }

fi



# since the kernel does not directly support hybrid sleep, we do

# something else -- suspend and schedule an alarm to go into

# hibernate if we have slept long enough.

# Only do this if we do not need to do any special video hackery on resume

# from hibernate, though.

if [ -z "$SUSPEND_HYBRID_MODULE" -a -w "$PM_RTC/wakealarm" ] && \n    check_suspend && check_hibernate && ! is_set $HIBERNATE_RESUME_POST_VIDEO; \n    then

    SUSPEND_HYBRID_MODULE="kernel"

    do_suspend_hybrid() {

        WAKETIME=$(( $(cat "$PM_RTC/since_epoch") + PM_HIBERNATE_DELAY))

        echo >"$PM_RTC/wakealarm"

        echo $WAKETIME > "$PM_RTC/wakealarm"

        if do_suspend; then

            NOW=$(cat "$PM_RTC/since_epoch")

            if [ "$NOW" -ge "$WAKETIME" -a "$NOW" -lt $((WAKETIME + 30)) ]; then

                log "Woken by RTC alarm, hibernating."

                # if hibernate fails for any reason, go back to suspend.

                do_hibernate || do_suspend

            else

                echo > "$PM_RTC/wakealarm"

            fi

        else

            # if we cannot suspend, just try to hibernate.

            do_hibernate

        fi

    }

fi

/sys/power/state

Code:

freeze mem disk