Sound not working after booting

First of all, I have tried to uninstall and then install again the drivers of the sound card for W8.1
The sound does not work if I have switched off my laptop and then boot it. If I reboot it, the sound works. It's just when I have switched off it from Windows (maybe because W8 does not a complete switch off but a kind of hibernation).
In the audio mixer of the tray the green bar which shows when it's playing sound works like it's working and if I plug some headphones on the jack port they work like a charm,
Any idea of what's happening? I've just bought this laptop last week and I'm very happy with it apart from this thing

From your models support page Download & Save the latest Audio driver.Go into Control Panel,Programs & Features- Uninstall IDT software.Restart the laptop. After Windows loads, install IDT audio using the downloaded file.
http://h10025.www1.hp.com/ewfrf/wc/softwareCategory?os=4063&lc=en&cc=us&dlc=en&sw_lang=&product=5218...
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Hi sushovanee,
Welcome to the HP Forums!
I would like to take a moment and thank you for using the forum, it is a great place to find answers. For you to have the best experience in the HP forum, I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I grasp you have a G6 notebook and after a period of time you lose the sound.
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Has there been any recent changes to your system?
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What exact model of G6 do you have?
How Do I Find My Model Number or Product Number
What Operating system are you running?
Sparkles1
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
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This question was solved.
View Solution.

My solution is here (registry editing required):
Conexant audio (vendor 14F1, device 5047) – no sound on Windows 7 – solved

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Go to Solution.

I'm not familiar with Linux Mint as I have been a Fedora guy for a long time, but since LM7 was
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almost certainly need the Windows XP installation media.
Finally, here is another thread on audio issues for a R51 user:
http://www.techsupportforum.com/forums/f19/solved-ibm-r51-no-sound-512806.html
Sorry for a bit muddled reply, but there you go... something to sink your teeth in at least.
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Message was edited by: kkoning

Hello isaidnomods,
I understand that the sound is not working correctly.
Go to HP.com and update the IDT audio and the BIOS.
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Sound not working after booting

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