04-03-2017 12:40 PM
For the benefit of anyone struggling with slow wireless speeds on a Lenovo laptop with the Qualcomm Atheros QCA9377 wireless card, here's what worked for me.
(tl;dr: disable WMM/QoS on your router)
So I just purchased a new IdeaPad 510S-14ISK. From the start, the wireless seemed slow, but I planned to remove Windows 10 and install 7, so I didn’t pay too much attention. After a clean install of Windows 7, the wireless was still very slow. Running speedtest.net I found 1-2 Mbps down and 30+ up. Other laptops in the house (Dell and Asus) get as high as 45 down and 45 up. (I have Verizon 50/50.) On Ethernet, the IdeaPad gets the same speed as anything else, so this was specifically a wireless issue.
I spent a lot of time reading different solutions and trying some random things:
Nothing made any difference.
Finally I found a couple of articles:
http://www.ybrikman.com/writing/2012/02/19/got-slow-download-but-fast-upload/ (where I stole the tl;dr summary)
As soon as I disabled the WMM/QoS on my FIOS router speeds on the IdeaPad jumped up to 30+/30+. Amazing difference and performance is perfect.
I think this problem is specific to the QCA9377 card. The Dell has an Intel dual band AC 8260 card in it. Not sure what card the Asus has. I don’t know if the FIOS router has a particular conflict or not. I have seen other posts where this change helped people on Comcast and other providers.
In any case, now I’m very happy with the laptop. I was honestly nervous for a minute there that I had made a big mistake. I just wish it had dedicated page up/page down buttons!!
Hope this helps some of you.
10-08-2017 01:44 PM
Thank you very much. I had same problem with Lenovo Flex3. Lenovo G50 worked fine... i have MI424WR BHR3 verizon router. Now i am up from 0.2 Mbps to 25 Mbps by changing this settings. i found WMM settings in below path
wireless settings-> advanced security setting-> other advanced wireless options ->wmm settings