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I am not able to put my laptop to suspend(sleep) mode,If I click on suspend it just locks the screen and nothing happens ?

I updated my previous version of UBUNTU from 13.04 to 13.10 then to 14.04

Any Idea why this is happening or any work around to fix the issue ?

I am using DELL VOSTRO 3400 with 64 bit OS

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Hello, and welcome to AskUbuntu ;) Well, could you try to open up your terminal ctrl+alt+t and use this command, to see if it works: sudo pm-suspend – denNorske Apr 23 '14 at 6:11
I also reported similar issue:… – Andrej Apr 23 '14 at 11:31
You may want to check out and follow – Dennis May 4 '14 at 20:23
I tried the script on 14.04 on a VAIO pro 13 flip . I finally get a resume instead of a black screen but I lost my mouse and my pad so it is useless. any ideas? – kwoby May 14 '14 at 13:54
Do you have an AMD/ATI Graphics card? – Devesh Khandelwal May 29 '14 at 4:58

3 Answers 3

You're possibly seeing this bug: Black screen after login from suspend in Xubuntu 14.04. Try removing light-locker and light-locker-settings and installing xscreensaver to solve the issue of buggy suspend/resume.

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I am not using any of these packages ? – Lohith MV Apr 25 '14 at 18:08
OK, then you're likely seeing something else. – landroni Apr 25 '14 at 23:17
I tried this and the issue still persists. – Christophe De Troyer May 2 '14 at 9:03
@ChristopheDeTroyer If you're seeing a specific issue, please ask a separate question describing the symptoms. – landroni May 2 '14 at 12:35
@ChristopheDeTroyer The original question is not that very clear, actually. It doesn't state the DE used, the power manager, the locker nor the screensaver.. – landroni May 2 '14 at 12:38

I got 'suspend' working after and update from Ubuntu 12.04 LTS to 14.04 LTS ( Sony Vaio VPCEB1E0E ).

I had previously used the script below on my Ubuntu 12.04 LTS: [source]

#inspired by
# tidied by tqzzaa :)

DRIVERS="uhci_hcd xhci_hcd"

unbindDev() {
  echo -n > $DEV_LIST 2>/dev/null
  for driver in $DRIVERS; do
    for dev in `ls $DDIR 2>/dev/null | egrep "^$HEX+:$HEX+:$HEX"`; do
      echo -n "$dev" > $DDIR/unbind
      echo "$driver $dev" >> $DEV_LIST

bindDev() {
  if [ -s $DEV_LIST ]; then
    while read driver dev; do
    while [ $((MAX_BIND_ATTEMPTS)) -gt 0 ]; do
          echo -n "$dev" > $DDIR/bind
          if [ ! -L "$DDIR/$dev" ]; then
            sleep $BIND_WAIT
    done < $DEV_LIST
  rm $DEV_LIST 2>/dev/null

case "$1" in
  hibernate|suspend) unbindDev;;
  resume|thaw)       bindDev;;

On Ubuntu 14.04 LTS, I changed the 'DRIVERS' line from: DRIVERS="ehci xhci" to: DRIVERS="uhci_hcd xhci_hcd" as was the case in the '/sys/bus/pci/drivers' directory.

The next thing I did was to edit the file '/etc/default/grub' (as root), changing the GRUB_CMDLINE_LINUX="" line to GRUB_CMDLINE_LINUX="acpi_sleep=nonvs".

Then running sudo update-grub.

[source Suspend fails (reboot on resume) and no hibernate option ]

These above set of steps did the trick for me.

Hope it helps.

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I have this problem after I used a different kernel version yesterday. Although I still don't know why it occurs, the following way may help you fix the problem.

To debug this problem is to run pm-suspend from terminal and check if there's something wrong by analyzing /var/log/pm-suspend.log.

For my case, a program which exit abnormal stopped the suspending. After I removed it, the suspend works again.

Running hook /etc/pm/sleep.d/soxy suspend suspend: 
Stopping Soxy proxy on port 7070       
No running Soxy process found
/etc/pm/sleep.d/soxy suspend suspend: Returned exit code 1.

Thu Sep 10 21:39:11 CST 2015: Inhibit found, will not perform suspend
Thu Sep 10 21:39:11 CST 2015: Running hooks for resume
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protected by Community Jun 12 '14 at 17:57

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