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5 Posts

12-01-2009

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Restore Dolby Home Theater v4 on T440s

2014-04-04, 19:57 PM

After upgrading my T440s (20AR) to Windows 8.1, Dolby Home Theater v4 did not work properly (i.e. making any changes to the user interface did not have any effects on the sound and the audio level display was dead when playing music. I then followed advice from this forum (Dolby Home Theater v4 not working properly! Please help!!) and deinstalled Dolby Home Theater v4.

 

However, after installation of the current Realtek audio driver (Realtek High Definition Audio Driver for Windows 8.1 Version 6.0.1.7188 gia136ww.exe), I have now been downgraded from  Dolby Home Theater v4 to Dolby Digital Plus.

 

How can I restore Dolby Home Theater v4? A T440s package is not available on the Lenovo drivers and software site. Is there an older driver that contains Dolby Home Theater v4?

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5 Posts

12-01-2009

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Re: Restore Dolby Home Theater v4 on T440s

2014-04-05, 18:42 PM

I have not yet tried to install ony of the available Dolby Home Theater v4 versions from the Lenovo drivers and software site because I worry that they contain model-specific settings for sound adjustment. Is that true?

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10 Posts

04-21-2014

Netherlands

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Re: Restore Dolby Home Theater v4 on T440s

2014-04-21, 20:30 PM

I did uninstall my Realtek driver, and reinstalled the by Lenovo provided Realtek driver (which contains Dolby Theater in the installation folder: C:\DRIVERS\WIN\AUDIO\DS1), but the software is still showing Dolby Digital, and the equalizer is not working properly.

 

Lenovo needs to fix this together with Realtek, since its a driver issue on Windows 8.1.

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664 Posts

10-21-2011

Germany

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Re: Restore Dolby Home Theater v4 on T440s

2014-04-21, 21:12 PM

As far as I can tell, there is no difference between "Dolby Digital Plus Home Theater" and "Dolby Home Theater v4", other than the name and a bit different UI...

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10 Posts

04-21-2014

Netherlands

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Re: Restore Dolby Home Theater v4 on T440s

2014-04-22, 4:54 AM
Even Dolby says, it should be Theater, http://www.dolby.com/us/en/consumer/product/pc/laptop/lenovo-thinkpad-t430s.html (YES t440s is what the site says.. check it out)

Those are two different products/technologies.

Beside that: changing the custom equalizer, doesnt really work, the knobw only slightly move (or is that the correct working)?

Lenovo should at least clearify what is going on.
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10 Posts

03-25-2015

Canada

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Re: Restore Dolby Home Theater v4 on T440s

2015-03-25, 4:33 AM

I'm experiencing this problem too.  The headphone jack one day stopped working so I uninstalled the Realtek drivers, no amount of futzing around with the Realtek's 'Multi-Stream' option could make it work again so I re-installed the Realtek drivers from the Lenovo Support site but noticd the Dolby software was missing.  Found, through this forum, that the Dolby software is located in the C:\Driver\Win\Audio\ folder, proceeded to install it, however, it installed a version that while similar in appearance to the previously installed version, it was completely different and simply didn't work at all, none of the options to change audio actually worked.

 

Where can I find a download link for the version of the Dolby AND Realtek drivers that came factory shipped with the laptop?  Running Windows 7 x64.

 

Edit: Problem solved.  Apparently uninstalling the Dolby software and Realtek drivers and instead using the Lenovo System Update to re-install the drivers fixed the problem and brought back the Dolby software I was previously using.  Yay.

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