imx6 sleep mode issue after optimisation of image

[Shivasagar_myana]

Hi,

iam facing one issue in imx6ul processor,  i have able to went to the sleep mode and successfully wake-up through gpio .

root@imx6ulevk:~# echo mem > /sys/power/state
[ 93.277335] PM: suspend entry (deep)
[ 93.281574] Filesystems sync: 0.000 seconds
[ 93.302294] Freezing user space processes ... (elapsed 0.003 seconds) done.
[ 93.305755] OOM killer disabled.
[ 93.305772] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
[ 93.307387] printk: Suspending console(s) (use no_console_suspend to debug)
[ 93.351912] PM: suspend devices took 0.010 seconds
[ 93.354420] Disabling non-boot CPUs ...
[ 93.354430] Turn off M/F mix!
[ 93.385697] PM: resume devices took 0.020 seconds
[ 93.402253] OOM killer enabled.
[ 93.405403] Restarting tasks ... done.

But, when i tried to optimise the image i have disabled some services, mainly whenever i disabled "

systemd-udev-trigger.service", iam not able to went to the sleep mode immediately, That means after 50 sec it is going to sleep mode.

root@imx6ulevk:~# echo mem > /sys/power/state
[ 12.154232] PM: suspend entry (deep)
[ 12.170576] Filesystems sync: 0.012 seconds

50 seconds delay......

Freezing user space processes ... (elapsed 0.003 seconds) done.
[ 64.519597] imx-sdma 20ec000.sdma: loaded firmware 3.5
[ 64.524899] OOM killer disabled.
[ 64.528142] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
[ 64.537095] printk: Suspending console(s) (use no_console_suspend to debug)

After 50sec i have wakeup the processor through gpio,

From next time onwards it is going to sleep mode as normally( means in micro sec), my problem is only first time it is behaving like that after reboot.

Can you please provide the solution for this.

Thanks and Regards,

Shiva Sagar.