As for screen flickering:

I found a quasi-fix for my problem.  I found in another forum somewhere that if you completely disable the auto-brightness, it will stop flickering.  

Obviously, it would be nice if the "auto-brightness" feature actually worked properly, and it is unfortunate that we have to disable it in order to have a functioning visual interface... but I suppose the siutation is analagous to when an escalator breaks down (they are still stairs!).

BUT!  I, and many others, will report that I did shut off auto-brightness (using the touch screen interface settings), and the screen flickering problem persisted.  Unfortunately (and I wish I could merit the original solver here, but I've lost the forum) for reasons unknown, Windows turns auto-brightness back on without your permission on a regular basis.  So, if you shut it off from the preferences menu, it comes right back on.  For me, this made me think that auto-brightness was not the issue causing the flickering.

However - when I went deep into advanced settings (not super easy to find on 8.1), I manually disabled "adaptive brightness," and now my screen flickering is gone (it's been about 2 weeks).

So, to recap:

"Adaptive brightness" appears to be broken, and this causes the flickering.

Shutting it off via:

"right swipe">Settings>Change PC settings>Power and sleep>Adjust my screen brightness automatically>No

--DOES NOT WORK to disable auto-bright.

Instead, shutting off via:

"right click on the windows icon">Control Panel>Hardware and Sound>Power Options>Change Plan Settings>Change advanced power settings>Display>Enable Adaptive Brightness>Off

--WILL work to disable auto-bright (at least for a decent amount of time..).

Just now - even entering the "Power and sleep" settings (in order to detail the path above) turned my adaptive brightness back on - EVEN THOUGH I didn't change a single setting.

Same sound problem here.

- bought yoga 2 pro 2 months ago ; was working fine

- msgs started to pop up telling me an audio jack was being plugged / unplugged on a random basis, after a month

- now the speakers don't work anymore (the headphones work fine however)

None of the suggestions of this forum has fixed it (even temporarily): plugging / unplugging repeatedly the jack, reinstalling drivers, tapping the side of the laptop, switching on and off the sound, enabling / disabling audio devices etc...

thanks for your help on this.

---

wrote:

As for screen flickering:

 

I found a quasi-fix for my problem.  I found in another forum somewhere that if you completely disable the auto-brightness, it will stop flickering.  

 

Obviously, it would be nice if the "auto-brightness" feature actually worked properly, and it is unfortunate that we have to disable it in order to have a functioning visual interface... but I suppose the siutation is analagous to when an escalator breaks down (they are still stairs!).

 

BUT!  I, and many others, will report that I did shut off auto-brightness (using the touch screen interface settings), and the screen flickering problem persisted.  Unfortunately (and I wish I could merit the original solver here, but I've lost the forum) for reasons unknown, Windows turns auto-brightness back on without your permission on a regular basis.  So, if you shut it off from the preferences menu, it comes right back on.  For me, this made me think that auto-brightness was not the issue causing the flickering.

 

However - when I went deep into advanced settings (not super easy to find on 8.1), I manually disabled "adaptive brightness," and now my screen flickering is gone (it's been about 2 weeks).

 

So, to recap:

 

"Adaptive brightness" appears to be broken, and this causes the flickering.

 

Shutting it off via:

"right swipe">Settings>Change PC settings>Power and sleep>Adjust my screen brightness automatically>No

--DOES NOT WORK to disable auto-bright.

 

Instead, shutting off via:

"right click on the windows icon">Control Panel>Hardware and Sound>Power Options>Change Plan Settings>Change advanced power settings>Display>Enable Adaptive Brightness>Off

--WILL work to disable auto-bright (at least for a decent amount of time..).

 

Just now - even entering the "Power and sleep" settings (in order to detail the path above) turned my adaptive brightness back on - EVEN THOUGH I didn't change a single setting.

---

Not sure why is this in the sound thread, but - you need to disable adaptive brightness in all 3 places to completely turn it off.

http://forums.lenovo.com/t5/Idea-Windows-based-Tablets-and/Yoga-2-Pro-Auto-brightness-feature-and-how-to-disable-in-Windows/ta-p/1294763

The option in Intel graphics panel isn't really an "adaptive brightness", but more of adjusting the display quality and brightness based on what's displayed on the screen at that moment. Kind of a different thing, but unlike adaptive brightness it saves some battery. I keep it on, but have adaptive brightness set to off in Windows 8 settings, and in display settings in all Battery power plans. That keeps the adaptive brightness always off.

Regarding the sound issue on the yoga, has anyone tried to disable headphone jack detection (by playing with regedit for example)? See http://forum.notebookreview.com/dell-xps-studio-xps/622035-disabling-headphone-jack-detection-2.html

If it is indeed a hardware pb, then the best solution would be to have a manual switch between headphones and internal speakers. Can't be that difficult to implement... Lenovo team?

Hi all,

I'm very dissapointed about my issue. My lenovo y2p mute itself. When unmute it changes status tu mute within a few soconds itself. I've got this pc over a month. This issue started yesterday.

Any idea how to fix this issue? Do you recommend reinstal audio driver?

Didn't want to reinstall audio driver or whole os before get some recommendation from more skilled users.

Many thanks for quick answer.

Deamonlang

To read that so many users have this problem is so sad. Why buy the most expensive notebook in the store to inherit a problem thats been troubling users for over a year. I've tried all the easy stuff. Jack in out >30x, mute,un mute, speaker defaults in control panel. If all of us had returned our machines the first time instead of blogging here and self medicating would it have made any difference? Is Lenova just good marketing, bad product?

Well, I had thought about returning at first but then there were no models from any manufacturer at that time they met my requirements so closely. The display is gorgeous, specification is good, it is light and small enough, excellent keyboard etc. For that reason I kept it. Moreover my sound problem never came back after I did the 30 times plug-in plug out one time.

I chose not to return, because I had seen how so many other people could not successfully return theirs.  Apparently, this is a warranty problem, so you get routed to Lenovo's service department, who keeps your laptop for a month and then sends it back to you with nothing fixed.  It is as though someone opens it up, says, "nothing's wrong here" and mails it back.

A new development on my particular laptop's sound: opening and closing the lid.  I will be watching a tv show through the use of the speakers (not headphones), and sound will shut off without any warning (presumably, the laptop sends the sound to the 3.5mm jack even though nothing has been plugged in).  I just close my lid a little bit, and the sound comes back on.  That is obviously a hardware problem.  Lenovo has told people for months that it is a software issue, and that's why they're not responsible (it's supposed to be RealTek's fault).  Well, Lenovo is clearly avoiding the fact that they really screwed the pooch on this one.  I also wouldn't be able to recommend a Lenovo to any of my loved ones in clear conscience.