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Steps to reproduce:
1. Install GNOME Weather (sudo apt install gnome-weather)
2. In GNOME Control Center > Privacy, enable Location Services
3. Open GNOME Weather at least once, so it embeds a forecast in the
notifications menu
4. Do something latency-sensitive on WiFi, like SSH or ping
Hypothesis:
When GNOME Weather 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.
Disabling location services in gnome-control-center and disabling
automatic location in gnome-weather solves this issue.
Expected behaviour:
Don't break WiFi for a weather report.
$ lsb_release -rd
Description: Ubuntu 20.04 LTS
Release: 20.04
$ apt-cache policy gnome-weather
gnome-weather:
Installed: 3.36.1-1
Candidate: 3.36.1-1
Version table:
*** 3.36.1-1 500
500 http://nl.archive.ubuntu.com/ubuntu focal/universe amd64 Packages
500 http://nl.archive.ubuntu.com/ubuntu focal/universe i386 Packages
100 /var/lib/dpkg/status
** Affects: geoclue-2.0 (Ubuntu)
Importance: Undecided
Status: Confirmed
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gnome-weather / geoclue polls wpasupplicant SSID list too often
https://bugs.launchpad.net/bugs/1875172
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Packages, which is subscribed to geoclue-2.0 in Ubuntu.
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