@Sebastien Thank you for your response. It is "Ubuntu 18.04.2".
I've found the root cause of this problem last week. In plugins/power /gsd-power-manager.c, handle_wake_up_screen enables temporary_unidle_done_cb to run after 15 seconds before system enters suspend. In most cases, temporary_unidle_done_cb will be removed by idle_became_active_cb right after resuming so it won't cause any trouble. In my case, after resuming, somehow temporary_unidle_done_cb is triggered before idle_became_active_cb meanwhile previous_idle_mode is still sleep mode, so it calls idle_set_mode to sleep again although has been inhibited. I've tried to put a workaround, letting temporary_unidle_done_cb to check if inhibit_suspend_taken to be true and not to execute idle_set_mode. It does solve this problem but seems not the right way to fix it. I added some wrapper to log the caller, hope it is easy to understand. ** Attachment added: "faillog7.log" https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/1832693/+attachment/5272633/+files/faillog7.log -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-settings-daemon in Ubuntu. https://bugs.launchpad.net/bugs/1832693 Title: System auto suspend again during resuming Status in gnome-settings-daemon package in Ubuntu: Incomplete Bug description: ## Issue In certain case, system wake-up from suspend will suspend again automatically. The issue comes from a target machine turning auto-suspend on and suspends after the idle time-out. Manually suspend, e.g., click suspend icon or execute "systemctl suspend" won't reproduce the issue. When waking up from this situation, the monitor keeps blank, although the monitor has exited low power mode, then suspend again immediately. Can successfully waking up the system after that, but once the system reaches the idle time again, the issue appears repeatedly. From the system log, a sleep request is following the wake request. Hardware configuration also counts. It is hard to reproduce the issue with the system installed on SSD or with a lower resolution monitor; graphics card may also affect. It's likely to be a timing issue. ## Environment Machine: Dell Precision 7920 Tower. Monitor: Philips 288P6L DistroRelease: Ubuntu 18.04.2 Graphics card: Nvidia Quadro P2200 Nvidia driver version: 418.74 CPU: Intel(R) Xeon(R) Platinum 8276 CPU @ 2.20GHz ## Steps to reproduce: Turn on automatic suspend in Settings->Power Wait for the system to suspend Wake up the system via pressing power button or keyboard. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/1832693/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
