Ubuntu 12.04 LTS Suspend not working FIX

[DragonNinja9]

Hi! Finally after a long time of searching and messing around I have figure out a temporary work around solution until this bug gets patched in future kernel releases. Please see below:

Use this script only if you have been experiencing issues with resuming from standby/suspend in Ubuntu 12.04 LTS and the screen remains lit but black when you wake your machine.


Step 1:
Open up a terminal and create a script file as follows:

 sudo gedit /etc/pm/sleep.d/20_custom-ehci_hcd

Step 2:
Copy the entire script below into the file you just created and save it:

#!/bin/sh
#inspired by http://art.ubuntuforums.org/showpost...0&postcount=19
#...and http://thecodecentral.com/2011/01/18...ot-working-bug
# tidied by tqzzaa :)
 VERSION=1.1
DEV_LIST=/tmp/usb-dev-list
DRIVERS_DIR=/sys/bus/pci/drivers
DRIVERS="ehci xhci" # ehci_hcd, xhci_hcd
HEX="[[:xdigit:]]"
MAX_BIND_ATTEMPTS=2
BIND_WAIT=0.1
 unbindDev() {
  echo -n > $DEV_LIST 2>/dev/null
   for driver in $DRIVERS; do
    DDIR=$DRIVERS_DIR/${driver}_hcd
    for dev in `ls $DDIR 2>/dev/null | egrep "^$HEX+:$HEX+:$HEX"`; do
      echo -n "$dev" > $DDIR/unbind
      echo "$driver $dev" >> $DEV_LIST
    done
   #for bus in $EHCI_BUSES; do
     echo -n $bus > /sys/bus/pci/drivers/ehci_hcd/unbind
 # done
   done
 }
 bindDev() {
  if [ -s $DEV_LIST ]; then
    while read driver dev; do
      DDIR=$DRIVERS_DIR/${driver}_hcd
      #for bus in $EHCI_BUSES; do
          echo -n $bus > /sys/bus/pci/drivers/ehci_hcd/bind
      #done
      while [ $((MAX_BIND_ATTEMPTS)) -gt 0 ]; do
          echo -n "$dev" > $DDIR/bind
          if [ ! -L "$DDIR/$dev" ]; then
            sleep $BIND_WAIT
          else
            break
          fi
          MAX_BIND_ATTEMPTS=$((MAX_BIND_ATTEMPTS-1))
      done
     done < $DEV_LIST
  fi
  rm $DEV_LIST 2>/dev/null
   chvt 1
  chvt 7
}
 EHCI_BUSES="0000:00:1a.0 0000:00:1d.0"
case "$1" in
    hibernate|suspend)
 unbindDev;;
     resume|thaw)
 bindDev;;
 esac

Step 3:
Give the script run permissions by typing:

 sudo chmod 755 /etc/pm/sleep.d/20_custom-ehci_hcd

This script should work or your money back guaranteed (Joking this is open source project so use at own risk :P ), as it forces the graphic card to reboot itself using a good old kick from chvt1 and chvt7 commands which simulate what I used to do manually using Ctrl + Alt + F1 and Ctrl + Alt + F7 to refresh the GUI.