[Pkg-utopia-maintainers] Bug#966133: network-manager: NM is slow to reconnect after suspend

[Stefan Monnier]

Package: network-manager
Version: 1.26.0-1
Severity: normal

Dear Maintainer,

All my Debian machines are much slower at reconnecting to the
local network than other machines (be they smartphones, tablets,
or laptops using proprietary OSes).

Here's what I see in the NM applet in the XFCE4 panel, when I wake
up from suspend:
- for about 10s the icon is "two computers" (which IIUC represents
  just NetworkManager sitting there pondering what to do).
- then the icon changes to the one representing a wired ethernet
  connection and stays that way for about 10s (there's nothing
  plugged into the ethernet port of this computer).
- then the icon changes to the "two dots, with something circling
  between them" which indicates that the system is in the process of
  connecting to a wifi network.
- after about 5s this changes to the bars representation of the
  signal quality.

IOW, while it takes about 5s to connect to the wifi network, it takes
about 20 additional seconds for NM to decide that it should try to
connect.

The 5s delay is fine, but the extra 20s looks like a bug to me.



-- System Information:
Debian Release: bullseye/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'stable')
Architecture: i386 (x86_64)
Foreign Architectures: amd64

Kernel: Linux 5.7.0-1-amd64 (SMP w/4 CPU threads)
Kernel taint flags: TAINT_WARN
Locale: LANG=fr_CH.UTF-8, LC_CTYPE=fr_CH.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages network-manager depends on:
ii  adduser          3.118
ii  dbus             1.12.20-1
ii  libaudit1        1:2.8.5-3+b1
ii  libbluetooth3    5.50-1.2
ii  libc6            2.31-1
ii  libcurl3-gnutls  7.68.0-1+b1
ii  libglib2.0-0     2.64.4-1
ii  libgnutls30      3.6.14-2+b1
ii  libjansson4      2.13.1-1
ii  libmm-glib0      1.14.0-0.1
ii  libndp0          1.6-1+b1
ii  libnewt0.52      0.52.21-4+b1
ii  libnm0           1.26.0-1
ii  libpam-systemd   245.6-2
ii  libpsl5          0.21.0-1.1
ii  libreadline8     8.0-4
ii  libselinux1      3.0-1+b3
ii  libsystemd0      245.6-2
ii  libteamdctl0     1.30-1
ii  libudev1         245.6-2
ii  libuuid1         2.35.2-7
ii  policykit-1      0.105-28
ii  udev             245.6-2
ii  wpasupplicant    2:2.9.0-13

Versions of packages network-manager recommends:
pn  crda                         <none>
ii  dnsmasq-base [dnsmasq-base]  2.81-4
ii  iptables                     1.8.5-2
pn  modemmanager                 <none>
ii  ppp                          2.4.7-2+4.1+deb10u1

Versions of packages network-manager suggests:
ii  isc-dhcp-client  4.4.1-2.1+b2
pn  libteam-utils    <none>

-- no debconf information