does not display after suspending laptop

sometimes screen turns black after starting laptop from sleep and nothing works so i have to shut down laptop and restart

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.13.0-79-generic 3.13.0-79.123~precise1
ProcVersionSignature: Ubuntu 3.13.0-79.123~precise1-generic 3.13.11-ckt33
Uname: Linux 3.13.0-79-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version k3.13.0-79-generic.
ApportVersion: 2.0.1-0ubuntu17.13
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 1: PCH [HDA Intel PCH], device 0: ALC3227 Analog [ALC3227 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: mayur 2283 F.... pulseaudio
 /dev/snd/controlC1: mayur 2283 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'HDMI'/'HDA Intel HDMI at 0xb2710000 irq 63'
   Mixer name : 'Intel Haswell HDMI'
   Components : 'HDA:80862807,80860101,00100000'
   Controls : 21
   Simple ctrls : 3
Card1.Amixer.info:
 Card hw:1 'PCH'/'HDA Intel PCH at 0xb2714000 irq 61'
   Mixer name : 'Realtek ALC3227'
   Components : 'HDA:10ec0282,103c2211,00100003'
   Controls : 21
   Simple ctrls : 10
Date: Tue Mar 8 13:39:21 2016
DistributionChannelDescriptor:
 # This is a distribution channel descriptor
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-stella-yuanli-precise-amd64-20140320-1
HibernationDevice: RESUME=UUID=d1d6f92f-3134-4618-a5d6-7afdf7cdbf37
InstallationMedia: Ubuntu 12.04 "Precise" - Build amd64 LIVE Binary 20140320-07:21
Lsusb:
 Bus 001 Device 002: ID 8087:8000 Intel Corp.
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 003: ID 04f2:b45e Chicony Electronics Co., Ltd
MachineType: Hewlett-Packard HP 15 Notebook PC
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-79-generic root=UUID=67a073c6-4b07-4f10-891f-73cc7619c95c ro i915.modeset=1 quiet splash "acpi_osi=!Windows 2012" vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-79-generic N/A
 linux-backports-modules-3.13.0-79-generic N/A
 linux-firmware 1.79.18
SourcePackage: linux-lts-trusty
UpgradeStatus: Upgraded to precise on 2015-12-28 (70 days ago)
WifiSyslog:

dmi.bios.date: 10/23/2014
dmi.bios.vendor: Insyde
dmi.bios.version: F.31
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: 2211
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 86.44
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnInsyde:bvrF.31:bd10/23/2014:svnHewlett-Packard:pnHP15NotebookPC:pvr0991100000000000000600087:rvnHewlett-Packard:rn2211:rvr86.44:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.name: HP 15 Notebook PC
dmi.product.version: 0991100000000000000600087
dmi.sys.vendor: Hewlett-Packard