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2 Posts

11-20-2013

NL

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Re: Yoga 2 Pro Wifi Problems

2014-05-12, 12:43 PM

Thanks Mark for the update! Appreciate the effort to at least offer a newer version to try out, pending an official release.

 

-- update --

 

Installed 17.0.2 (Y2P, Win 8.1, x64), rebooted and had my first connection 'drop' in 8 minutes. Too bad. The connection drop was slightly more annoying with these 17.0.2 drivers, as I wasn't able to fix the connection without rebooting. While the connection was malfunctioning, Windows 8.1 insisted that the connection is OK, instead of limited. Also I could not fix it like I sometimes manage to fix dropped connections with 16.x drivers: by disabling the network adapter (from control panel -> system -> device manager) and re-enabling again. With 17.0.2 that procedure didn't restore my connection.

 

Rolling back for now... 

 

 

 

 

 

 

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4 Posts

03-24-2014

United States

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Re: Yoga 2 Pro Wifi Problems

2014-05-13, 1:14 AM

Yay the 17.0.2 driver worked for me! I wen't from zero ability to connect to fully functional. If i get drops I'll edit this post but I think i'm finally in the clear for now

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4 Posts

05-13-2014

UK

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  • Message 973 of 1678

Re: Yoga 2 Pro Wifi Problems

2014-05-13, 12:00 PM

Ok, I've recently got my Yoga 2 Pro and like others here am having the same **bleep** issues.

 

I've carried out all of the instructions from others and the Moderator Mark, but the still struggle to get any kind of WiFi Connection.

So I've:-

Updated the Driver

Removed the Intel Management Software

Disbaled the Power Save Features

and even tried various frequencey and WiFi Modes under advanced settings.

 

All of these make little or NO Difference to connectivity.

 

The only way I can conect is if I'm within 2 Meters of a router, this seems to indicate that there are major issues with this machines hardware, and driver Updates will have no effect at all.

 

At times my Wifi shows no networks available when there are, and other times shows 5 Bar strength but unable to connect, again indication a failure in Signal Strength, either through poor design of the Aerial/Antenna or poor WiFi Cards.

 

Either way under British Law (where I am, obviously) these machines are unfit for use and as such under law, with unlimited fine if they are not repaired or replaced.

 

I don't want to have to return a Top of the Range Machine but I need to know what Lenovo are going to do about this...

 

So with some 1000 Posts on here from disgruntled owners WHAT ARE YOU GOING TO DO ABOUT THIS? in simple terms without any arseing around.

 

MARK or Lenovo Please answer or it looks like you will have a class action any day soon.

 

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9380 Posts

11-27-2007

SK

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Re: Yoga 2 Pro Wifi Problems

2014-05-13, 5:56 AM

Andy  

______________________________________


Please remember to come back and mark the post that you feel solved your question as the solution, it earns the member + points

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Forum Search Option T430 2347-G7U W8 x64, Yoga 10 HD+, Tablet 1838-2BG, T61p 6460-67G W7 x64, T43p 2668-G2G XP, T23 2647-9LG XP, plus a few more.

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9380 Posts

11-27-2007

SK

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Re: Yoga 2 Pro Wifi Problems

2014-05-13, 14:40 PM

Andy  

______________________________________


Please remember to come back and mark the post that you feel solved your question as the solution, it earns the member + points

Did you find a post helpfull? You can thank the member by clicking on the star to the left awarding them Kudos

Please add your type, model number and OS to your signature, it helps to help you.

Forum Search Option T430 2347-G7U W8 x64, Yoga 10 HD+, Tablet 1838-2BG, T61p 6460-67G W7 x64, T43p 2668-G2G XP, T23 2647-9LG XP, plus a few more.

FYI Unsolicited Personal Messages will be ignored.

de.gif  Deutsche Community   es.gif  Comunidad en Español  uk.gif  English Community ru.gif Русскоязычное Сообщество

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7 Posts

11-26-2013

Brno

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Re: Yoga 2 Pro Wifi Problems

2014-05-13, 21:39 PM

I've made some deeper investigation today and found out that this issue, in my case, has something to do with poor electrical design and/or EM shielding. Most of the time my WiFi works great and sees about 6 to 8 networks in my area, but after I connect my USB hub (PremiumCord 4x USB 3.0 Model No.:KU3HUB4A) to USB 3.0 port WiFi starts to lose signal, number of visible networks is decreasing until there is only one active network and WiFi periodically drops this connection. When I unplug the hub, WiFi returns to normal/stable state. When I plug any other device that has no own power supply (2.5" USB 3.0 HDD or external sound card) directly to the USB 3.0 port I can not see any issue.

I don't know if my source of the problem is unique or widespread but I suggest to consider if there is some externally connected device at times of instability that can cause interference, voltage level change or sth like that.

And why Lenovo isn't doing "anything" and did not give an official statement or fix it? Maybe they know, that only solution is to replace all defective units because of the design flaw ... Maybe, they have no idea ...

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119 Posts

04-14-2014

United States

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  • Message 977 of 1678

Re: Yoga 2 Pro Wifi Problems

2014-05-13, 21:46 PM

USB 3.0 creating interference in the 2.4GHz wireless frequency band is a known phenomenon, and it's advised to use the 5GHz band when using USB 3.0 ports (which this laptop does not have by default, but AC Wi-Fi cards provide).  It is not specific to Lenovo's devices.

 

http://www.macobserver.com/tmo/article/usb-3.0-hard-drives-can-cause-wi-fi-interference

https://www.asus.com/support/FAQ/1004004/

http://www.intel.com/content/www/us/en/io/universal-serial-bus/usb3-frequency-interference-paper.html

 

etc.

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27 Posts

04-15-2014

Chile

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Re: Yoga 2 Pro Wifi Problems

2014-05-14, 1:41 AM

Good find MakeMin!  Just tried it and I had 13 networks before plugging in my USB 3.0 hub and that's gone down to 2 networks after plugged in but no connection drop outs yet.

 

Moderator Note; post edited to conform with the  Forum Rules

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966 Posts

01-28-2013

United States

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Re: Yoga 2 Pro Wifi Problems

2014-05-14, 2:00 AM

wrote:

USB 3.0 creating interference in the 2.4GHz wireless frequency band is a known phenomenon, and it's advised to use the 5GHz band when using USB 3.0 ports (which this laptop does not have by default, but AC Wi-Fi cards provide).  It is not specific to Lenovo's devices.

 

http://www.macobserver.com/tmo/article/usb-3.0-hard-drives-can-cause-wi-fi-interference

https://www.asus.com/support/FAQ/1004004/

http://www.intel.com/content/www/us/en/io/universal-serial-bus/usb3-frequency-interference-paper.html

 

etc.


You're correct.Just look at Macbook Pros and Airs community.  Heck even my Microsoft Sculpt comfort Bluetooth mouse becomes laggy when I connect at 2.4 Ghz band. I noticed that the lag is gone when you use the G protocol which doesn't use the QAM modulation. I think the QAM modulation at 2.4 GHz is more susceptible to Bluetooth interference than the older modulation used by G and B.

Lenovo Y470: i7-2670QM | 8 GB DDR3 1333 MHz RAM | Nvidia GeForce GT 550M | 500 GB 7200 RPM Seagate HDD | ASUS PCE-AC56 802.11ac Network Adapter | Windows 7 Professional 64-bit
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4 Posts

05-13-2014

UK

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  • Message 980 of 1678

Re: Yoga 2 Pro Wifi Problems

2014-05-14, 6:57 AM

Ok follow up to what I and others have written.

 

As I said earlier I suspected that it was a Mutual Interference Issue between the Signals and Signal Modes from the WiFi/Bluetooth card and now from others possibly also the USB 3 Port.  I mean what do I know I only work as an Engineer in the Aerospace and Defence Industry!!

 

One possibly solution to get any kind of WiFi acces that seems to have worked for me late last night was to:-

  • Disable Bluetooth
  • Disable Power Save Management
  • Go to Devices Manager, advaced properties and under the list of WiFI Protocols listed got to the bottom of the list and select "b" only NOT b/g

Save these settings and watch what happens, for me the signal strength from 10 Meters from the router went from 2 to 5 Bars and hasn't dropped in 6 Hours use.

 

This may not work for all, all depending on your default router settings, but have a play with these and you may get lucky.

 

BUT again this all points to Poor Design and Signal Interference either from the Aeraials/Antenna or from the Modulation of the Signals cancelling/Distorting the Data flow.  Hence the Drop Outs and unable to connect despite seeing the Networks.  The only way to truly find out is to connect a Spectrum Analyser at the Data Path and turn each Frequency/Mode of Modulation on in turn and watch for drop outs....not something even I can do without access to the Internals and code...

 

Classic Mutual Interference as used for Jamming in the Military!!!!!!!

 

So in summary what do we have.......a machine that is Broken and needs to be hobbled to get working...

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