Lenovo Legion 7 issues

Recently I've bought Lenovo Legion 7 laptop for work. I thought it would be great to highlight setup steps and potential issues with Lenovo Legion 7 laptop. I do it mostly for myself to remember how I did it.

My version has the following configuration: LENOVO Legion 7 15IMH05, 15.6", IPS, Intel Core i7 10750H 2.6GHz, 16GB, 512GB SSD, NVIDIA GeForce RTX 2070 MAX Q - 8192 Mb, Windows 10, 81YT0017RU. I bought it with a rather good $350 discount. 

Please, be careful with laptop configuration and do everything at your own risk. I cannot guarantee that things worked for me will work for you.

  1. The first issue that I faced with was that when you just plug-in HDMI cable (without even plugging in the other end of it), Wi-Fi stops working. It happens when Wi-Fi frequency is at 5GHz. That it's not only a Windows issue, but Ubuntu Linux also has the same problem.
    There are several ways advised to solve this issue:
    • buy a better-isolated HDMI cable. I finally bought a HAMA Premium GOLD HDMI v2.0 1.5-meter cable and it seems to solve the issue for me!
    • rollback WLAN driver to an older version shipped with Windows (not the one that is provided by Lenovo). The older driver worked for me for a while, but then I did some manipulations and this approach stopped working for me for some reason.
    • switch Wi-Fi frequency to 2.4GHz. I did it both in Windows and in Ubuntu Linux and for now, I live with this solution. In Windows, it's done in driver settings (from Device Manager). In Ubuntu, it can be done by running nm-connection-editor in the command line.
  2. In any Linux distribution, there will be no sound from speakers due to this bug. Note, that you'll have the sound if you plug in headphones.
  3. Ubuntu will not install when RST is enabled in BIOS, but if you turn it off, Windows will stop loading.
    I followed this guide, but it didn't really work well for me. Windows was not loading and commands from the guide didn't work (some paths were different, etc). If I remember correctly, I loaded the command line in repair mode and ran bcdedit /set safeboot minimal then I loaded into the operating system in safe mode, and then I executed bcdedit /deletevalue safeboot
    I guess loading in safe mode helped to fix storage drivers.
  4. Also, I decided to turn off Secure Boot when installing Ubuntu to avoid all the hustle with drivers signing.
  5. Another minor issue that I've noticed is a quiet noise from a laptop charger. You will barely spot it during the day. But you might hear it if you are in a quiet room at night. As far as I read on the Internet, it is not considered an issue and should be harmless (at least, I hope so).