I was getting poor latency on my system with an "Intel Corporation Wireless 8265 / 8275" adapter because Geoclue was initiating scans nearly continuously. This is caused by a bug which was fixed in a Geoclue 2.5.7:
https://gitlab.freedesktop.org/geoclue/geoclue/-/commit/7b52291b6e45fbb93604b838a0ba02fbbde7cd39 Ubuntu 20.04 is still affected because the latest available version is 2.5.6. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to geoclue-2.0 in Ubuntu. https://bugs.launchpad.net/bugs/1875172 Title: geoclue polls wpasupplicant SSID list too often, resulting in lag and packet loss Status in geoclue-2.0 package in Ubuntu: Confirmed Bug description: Steps to reproduce: 1. Install GNOME Weather, or GNOME Clocks, or basically anything that determines your location 2. In GNOME Control Center > Privacy, enable Location Services (note that I am unsure about this part; it may not even be necessary) 3. Open the application requesting your location 4. Do something latency-sensitive on WiFi, like SSH or ping Hypothesis: When an application requesting your location is running in the background and location services are enabled, it seems to tell geoclue to use NetworkManager's D-Bus API for letting wpasupplicant scan for surrounding networks very often. This causes lots of latency spikes and visible lag. Typing characters in an SSH session is rather laggy, and running something as simple as mtr 192.168.1.1 will show that every ~20 seconds the latency is over 100ms and packet loss occurs, while it's normally around 1.5ms with no packet loss. There are probably lots of other issues caused by this as well. When a WiFi adapter scans for SSID's, it has to switch channels, delaying or dropping traffic in the meanwhile. This is what causes the lag and packet loss. On phones connected to LTE this may make sense, but on a laptop which uses WiFi as its active network, this is detrimental to the connection. Changing /etc/geoclue/geoclue.conf to disable WiFi scanning, solves this problem: [wifi] enable=false On Ubuntu 18.04, this setting was the default. On Ubuntu 20.04, it has changed to 'true'. Expected behaviour: Don't break WiFi for a location scan. $ lsb_release -rd Description: Ubuntu 20.04 LTS Release: 20.04 $ apt-cache policy geoclue-2.0 geoclue-2.0: Installed: 2.5.6-0ubuntu1 Candidate: 2.5.6-0ubuntu1 Version table: *** 2.5.6-0ubuntu1 500 500 http://nl.archive.ubuntu.com/ubuntu focal/main amd64 Packages 100 /var/lib/dpkg/status To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/geoclue-2.0/+bug/1875172/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
