Hibernation crash on IMX6

[Chetankumar]

Hi,

we have enabled hibernation in imx6q using following procedure:

a. enabled CONFIG_HIBERNATION in kernel menuconfig.

b. created swap file in /dev/mmcblk0p3 (in home directory):

            dd if=/dev/zero of=swapfile bs=4k count=500000

            mkswap swapfile          

           swapon swapfile

c. Added kerel arguments in u-boot (to resume from disk)

                    resume=/dev/mmcblk0p3 resume_offset=4955662      (Points to swap file)

d. setting hibernate mode:

                    echo "disk" > /sys/power/state

Hibernation image is created successfully,While resuming from hibernation we observed, board is restarting continuously. By debugging using "test_resume" we are able to capture the crash(PFA) and attached boot log for reference.

If you provide any input and any methods how to debug this crash which will be helpful.

Regards,

N Chetan kumar

[igorpadykov]

Hi Chetan

supported low power modes can be found in official nxp linux documentation,

in particular  Table 10. Power Management Modes  i.MX Linux Reference Manual​

https://www.nxp.com/design/software/embedded-software/i-mx-software/embedded-linux-for-i-mx-applicat...

Unfortunately hibernation mode is not supported, sorry.

Best regards
igor

[Chetankumar]

Hi Igor,

Thanks for the reply.

But in one of IMX6 board we are able to perform hibernation with same procedure.

In custom board(imx6q based) we are facing this issue.

[igorpadykov]

Hi Chetankumar

one can try to debug it using AN4553 Using Open Source Debugging Tools for

Linux on i.MX Processors, comparing behaviour for both boards
Using Open Source Debugging Tools for Linux on i.MX Processors

Best regards
igor