Ferry, Chris,
I thought you were trying to test hibernation. Let's switch back to
suspend to mem.
The first thing is to figure out what suspend mode you are using:
1. boot with the same kernel with TPM disabled.
2. cat /sys/power/mem_sleep,
echo 'N' > /sys/module/printk/parameters/console_suspend
echo 'Y' > /sys/module/printk/parameters/initcall_debug
and leverage pm_test mode to narrow down:
3. echo different mode to /sys/power/pm_test
start from right to left (freezer to devices to platform...)
[none] core processors platform devices freezer
check if the system could resume back within 5 seconds.
For example:
echo freezer > /sys/power/pm_test
echo mem > /sys/power/state
if succeed to resume back, then:
save the dmesg and launch the next test mode:
echo devices> /sys/power/pm_test
echo mem > /sys/power/state
and go on util you see a hang during resume.
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https://bugs.launchpad.net/bugs/1848771
Title:
Reboot after resume from suspend (deep)
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