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Lenovo Legion 5pi 2020 - Extremely slow LAN/WIFI - Help please!

2020-09-24, 3:47 AM

Recently bought this laptop.


Recently issues have started like no audio (which was fixed by upgrading windows).


Now, the internet on this laptop, and ONLY on this laptop in my entire network seems capped at 8mbs/1mbs. 


I have isolated it by using speedtest.net using the same servers. 


I compared it with my phone's wifi (consistent 50mbs download/20 upload) where as my laptop's wifi speed + LAN test on 2 different cables show internet both show slow consistent speeds of 8mbs download / 0.8 upload).


Furthermore, I tried hotspotting from phone's wifi to my laptop, thus, again, the laptop would only achieve the same slow result of 8mbs / 0.8 while the phone is still consistently 50mbs/20mbs)


I've used the lenovo vantage app to check for any hardware or drivers that need updating, and it indicates all is good with a green tick.


It's very frustrating as  I bought this for gaming, yet I cannot game with this due to this problem.


Can anyone tell me whats wrong?


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Re:Lenovo Legion 5pi 2020 - Extremely slow LAN/WIFI - Help please!

2020-09-24, 8:29 AM



Welcome to the Lenovo forum community!


Please try the following:

Step 1: Network Reset.

- Right click the Windows icon in the bottom right and select "Settings"(cogwheel) or search for it.

- Select the "Network & Internet" Icon.

- While in the "Status" tab, scroll down until you find "Network Reset"

- Click this and continue, then perform a computer restart.

- Find your network and connect to it (You will have to type in the password (SSID/Key) again to connect)

- Make sure you tick the box that says "Automatically connect to this device" or similar


Step 2: Disable Automatic Hardware drivers update.

- Right click the Windows Icon, select the "Search" Function.

- Type "Control Panel" and select "Small icons" or "Large Icons" in the "View By" top right.

- Click the "System Icon"

- Navigate to "Advanced System Settings" -> "Hardware"

- Click "Device Installation Settings" and Select "No"

** This will prevent Windows from interfering with the drivers of your WLAN and device in future Windows updates.


Step 3: Uninstalling Device + Drivers.

- Right click the Windows icon in the bottom right and select "Device Manager"

- Navigate to the "Networks Adapter" tab and drop it down.

- Right click the "Wireless Network Adapter / WLAN device" and select "Uninstall Device"

- Tick the box "Delete the driver software for this device" if prompted.

- Perform a restart of the computer, then run/install the driver provided on the Support Page

- Right click the file and select "Run As Administrator"


Some wireless network cards allow you to limit the channel width via the Advanced properties in Device Manager, so you might try limiting it to 20-40MHz as a test


- Right-click Start and select Device Manager

- Left-click to expand the Network Adapters section

- Right-click on your Wireless Adapter and select Properties

- Select the Advanced Tab and look for a Channel Width setting with the ability to change between 20 / 20-40 / 20-40-80 mhz. Sett it to the highest Channel Width if it has been somehow lowered.


** Depending if the device is far or close to the router, or if there is walls or floors between the device and router.

** These settings may differ between WLAN adaptors.  

Try to go to Device Manager again, and right click your WLAN device. Select properties and then "Advanced"

Try forcing the WLAN device to use the 2.4ghz band and turn off the "Auto" for the other band frequency.

If this seems to drop the connection more, then try using the 5Ghz band.


General Band Info:

2.4GHz (slower, but longer range) , the 2.4ghz band is also a very crowded bandwidth, used by everything from garage openers to microwaves and lots of other stuff.

5GHz (faster, but shorter range). is less crowded, depending on where you live, but because of the higher frequency is not able to penetrate walls as easy as the 2.4ghz.




Type ‘Registry Editor’ in Windows Search

Open it and find: “HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NlaSvc\Parameters\Internet”

Change the “EnableActiveProbing” value from 0 to 1

Click ‘OK’, close the editor

Restart your computer

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