Comment 80 for bug 1848921

This issue is fixed with kernel version 5.4.49 (current longterm kernel). I was having the exact same issue for almost 3 months. My Wifi speed used to get throttled whenever I download something or just consume more bandwidth continuously. More importantly whenever the throttling happens, the laptop also freezes for a few seconds. During these 3 months I tried several iwlwifi configurations, changed its driver versions... etc. Nothing worked.

But then updating the kernel from version 5.3.0 to 5.4.49 manually fixed the issue. Now the wifi works perfectly without any issues. I haven't faced any other issue with this kernel yet(I am on Ubuntu 18.04). Also, now I couldn't see any iwlwifi error messages getting reported in dmesg logs.