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Tags: 14.04   suspend  
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Title: Ubuntu fails to "Suspend"
ID: /2016/09/08/Ubuntu-fails-to-_Suspend_
Created: September 8, 2016    Edited:  February 8, 2020
Upload: November 24, 2022    Layout:  post
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In your BIOS setup there can be a setting to Wake on LAN or Wake on USB. If these are on turn them off and see if that fixes the problem.

I’ve also found that a bad USB cable connected to a powered-hub can generate error messages in dmesg but I’m not sure if that would wake up the system.

Update February 8, 2020

These lines in your log file:

Running hook /usr/lib/pm-utils/sleep.d/60_wpa_supplicant suspend suspend:
Failed to connect to non-global ctrl_ifname: (null)  error: No such file or directory
/usr/lib/pm-utils/sleep.d/60_wpa_supplicant suspend suspend: success.

Are perhaps the reason /lib/systemd/system-sleep/wpasupplicant was created as described in this discussion. Check if this file exists and if not see this:

⇧ Editing OS names in /etc/default/grub - where is the OS name read from? Paste from clipboard into terminal with down-arrow, possible? :)  â‡©