Dear Linux folks,
Updating an IBM S822LC from Ubuntu 18.10 to 19.04 some user space stuff seems to have changed, so that going into sleep/suspend is enabled.
That raises two questions. 1. Is suspend actually supported on a POWER8 processor?
Apr 27 10:18:13 power NetworkManager[7534]: <info> [1556353093.7224] manager: sleep: sleep requested (sleeping: no e Apr 27 10:18:13 power systemd[1]: Reached target Sleep. Apr 27 10:18:13 power systemd[1]: Starting Suspend... Apr 27 10:18:13 power systemd-sleep[82190]: Suspending system... Apr 27 10:18:13 power kernel: PM: suspend entry (s2idle) -- Reboot --
$ uname -m ppc64le $ more /proc/version Linux version 5.1.0-rc6+ (joey@power) (gcc version 8.3.0 (Ubuntu 8.3.0-6ubuntu1)) #1 SMP Sat Apr 27 10:01:48 CEST 2019 $ more /sys/power/mem_sleep [s2idle] $ more /sys/power/state freeze mem $ grep _SUSPEND /boot/config-5.0.0-14-generic # also enabled in Ubuntu’s configuration CONFIG_ARCH_SUSPEND_POSSIBLE=y CONFIG_SUSPEND=y CONFIG_SUSPEND_FREEZER=y # CONFIG_SUSPEND_SKIP_SYNC is not set # CONFIG_PM_TEST_SUSPEND is not set
Should the Kconfig symbol `SUSPEND` be selectable? If yes, should their be some detection during runtime?
2. If it is supported, what are the ways to getting it to resume? What would the IPMI command be?
For now I disabled the automatic suspend, masking the targets [1]. Kind regards, Paul [1]: https://wiki.debian.org/Suspend#Disable_suspend_and_hibernation
