No sound from Laptop speakers, but headphones ubuntu 14.04

Hi,
I got Hp 6930p and there is a problem with sound in my ubuntu. I got it when I start computer but when I close it and open again there is no sound just in headphones.
I install veromix and there I can change from headphones to speaker but there is a resolution just for a moment. Because the problem comes again.
How can I resolve this problem. I got Ubuntu 14.04
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ApportVersion: 2.14.1-0ubuntu3.21
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: michal 1570 F.... pulseaudio
CurrentDesktop: Unity
DistroRelease: Ubuntu 14.04
HibernationDevice: RESUME=UUID=938dfaca-2f98-4959-8d1a-ea5c5947a2d3
InstallationDate: Installed on 2016-07-22 (0 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
MachineType: Hewlett-Packard HP EliteBook 6930p
Package: linux (not installed)
PccardctlStatus:
 Socket 0:
   3.3V
  16-bit
  PC Card
   Subdevice 0 (function 0) bound to driver "pata_pcmcia"
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-92-generic root=UUID=2b32920d-f4d3-4c47-83d6-70496d6b19fd ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.13.0-92.139-generic 3.13.11-ckt39
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-92-generic N/A
 linux-backports-modules-3.13.0-92-generic N/A
 linux-firmware 1.127.22
Tags: trusty
Uname: Linux 3.13.0-92-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 03/05/2010
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68PCU Ver. F.17
dmi.board.name: 30DB
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 87.2A
dmi.chassis.asset.tag: CZC0120X31
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvr68PCUVer.F.17:bd03/05/2010:svnHewlett-Packard:pnHPEliteBook6930p:pvrF.17:rvnHewlett-Packard:rn30DB:rvrKBCVersion87.2A:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP EliteBook 6930p
dmi.product.version: F.17
dmi.sys.vendor: Hewlett-Packard