Got here via https://askubuntu.com/questions/1230525/ubuntu-20-04-network-performance-extremely-slow When I've updated to Ubuntu 20.04 LTS on 02 May 2020, same problem occurred. I've experienced slow wifi performance, much slower than usual. As suggested in duplicate of this bug (https://bugs.launchpad.net/ubuntu/+source/backport-iwlwifi-dkms/+bug/1869588), removing the package backport-iwlwifi-dkms solved the problem.
On Lenovo ThinkPad E580, Network controller: Intel Corporation Dual Band Wireless-AC 3165 Plus Bluetooth -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1869587 Title: WiFi performance is slow To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/backport-iwlwifi-dkms/+bug/1869587/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
