I am running the latest install of Arch Linux on the Asus Zenbook UX305-FA. Here is a link to the hardware: http://www.amazon.com/Zenbook-UX305FA-Laptop-Intel-Greyish/dp/B00SGS7ZH4 Upgrading from kernel linux-4.1.6-1 to linux-4.2.3-1 stopped the computer from suspending MOST OF THE TIME when the lid was closed. I never had a problem before. A downgrade back to linux-4.1.6-1 seems to have resolved the issue. Here are some relevant logs: # journalctl -p 0..3 -xn -- Logs begin at Tue 2015-08-25 11:42:43 MDT, end at Wed 2015-10-14 23:51:23 MDT. -- Oct 14 23:20:14 localhost systemd-logind[315]: Failed to abandon session scope: Transport endpoint is no Oct 14 23:20:15 localhost kernel: watchdog watchdog0: watchdog did not stop! -- Reboot -- Oct 14 23:29:47 localhost kernel: pci_pm_suspend(): hcd_pci_suspend+0x0/0x30 [usbcore] returns -16 Oct 14 23:29:47 localhost kernel: dpm_run_callback(): pci_pm_suspend+0x0/0x150 returns -16 Oct 14 23:29:47 localhost kernel: PM: Device 0000:00:14.0 failed to suspend async: error -16 Oct 14 23:29:47 localhost kernel: PM: Some devices failed to suspend, or early wake event detected Oct 14 23:34:56 localhost kernel: pci_pm_suspend(): hcd_pci_suspend+0x0/0x30 [usbcore] returns -16 Oct 14 23:34:56 localhost kernel: dpm_run_callback(): pci_pm_suspend+0x0/0x150 returns -16 Oct 14 23:34:56 localhost kernel: PM: Device 0000:00:14.0 failed to suspend async: error -16 Oct 14 23:34:56 localhost kernel: PM: Some devices failed to suspend, or early wake event detected
I think this may be a duplicate of the bug I've filed at https://bugzilla.kernel.org/show_bug.cgi?id=105641 For my case there's a workaround, and looking at your journal, it will help your case. Blacklist the webcam driver (uvcvideo) in a .conf file in /etc/modprobe.d. Good luck.
Indeed a duplicate, thanks for the pointer. *** This bug has been marked as a duplicate of bug 105641 ***