[Bug 1870410] Re: wireless does not work on boot

[Dave Jones]

Also tested under armhf and arm64 on Raspberry Pi models 3B, 3A+, and
3B+. Results are the same as for bdmurray's tests with armhf on the 3B
above.

My initial suspicion was that this was related to the wifi chipset used
on the 3B (the BCM43430) to the 4B (the BCM43455). However, given the
3A+ and 3B+ also use the BCM43455 (same as the 4B) it's definitely not
that.

Given that the only error ("DHCP4 CLIENT: Failed to attach event...")
occurred in systemd-networkd I attempted to downgrade from version 245.2
to 244.3 (the prior release on Ubuntu). This fixes the issue on the 3B
and 3A+ under armhf and arm64 (I skipped checking the 3B+ for time at
this point).

At this point I'm reasonably confident it's an issue in systemd
introduced sometime between 244.3 and 245.2 - and that it may be timing
sensitive given that the 4B (which is significantly faster than the 3,
3A+ or 3B+) doesn't show the same symptoms but shares a wifi chipset
with the 3A+ and 3B+.

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https://bugs.launchpad.net/bugs/1870410

Title:
  wireless does not work on boot

Status in systemd package in Ubuntu:
  New

Bug description:
  I've setup a wireless config in /etc/netplan/config.yaml and it does
  not activate on boot. I have to run 'sudo netplan apply' to get my
  wireless connected. This works fine on an RPi4 but not an RPi3B.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: systemd 245.2-1ubuntu2
  ProcVersionSignature: User Name 5.4.0-1006.6-raspi2 5.4.24
  Uname: Linux 5.4.0-1006-raspi2 armv7l
  ApportVersion: 2.20.11-0ubuntu21
  Architecture: armhf
  Date: Thu Apr  2 19:02:27 2020
  Lspci:
   
  Lsusb:
   Bus 001 Device 007: ID 0424:ec00 Microchip Technology, Inc. (formerly SMSC) SMSC9512/9514 Fast Ethernet Adapter
   Bus 001 Device 006: ID 0424:9514 Microchip Technology, Inc. (formerly SMSC) SMC9514 Hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  Lsusb-t:
   /:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=dwc_otg/1p, 480M
       |__ Port 1: Dev 6, If 0, Class=Hub, Driver=hub/5p, 480M
           |__ Port 1: Dev 7, If 0, Class=Vendor Specific Class, Driver=smsc95xx, 480M
  ProcKernelCmdLine: coherent_pool=1M 8250.nr_uarts=1 bcm2708_fb.fbwidth=656 bcm2708_fb.fbheight=416 bcm2708_fb.fbswap=1 smsc95xx.macaddr=B8:27:EB:FF:6B:0F vc_mem.mem_base=0x3ec00000 vc_mem.mem_size=0x40000000  net.ifnames=0 dwc_otg.lpm_enable=0 console=ttyS0,115200 console=tty1 root=LABEL=writable rootfstype=ext4 elevator=deadline rootwait fixrtc quiet splash
  SourcePackage: systemd
  UpgradeStatus: No upgrade log present (probably fresh install)

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