[Bug 1912385] Re: No wlan interfaces found on CM4 after firmware update

[William Wilson]

This bug is fixed in the current version of focal:

ubuntu at ubuntu:~$
ubuntu at ubuntu:~$ apt-cache policy linux-firmware-raspi2
linux-firmware-raspi2:
  Installed: 4-0ubuntu0~20.04.1
  Candidate: 4-0ubuntu0~20.04.1
  Version table:
 *** 4-0ubuntu0~20.04.1 500
        500 http://ports.ubuntu.com/ubuntu-ports focal-updates/multiverse armhf Packages
        100 /var/lib/dpkg/status
     1.20200212-0ubuntu1 500
        500 http://ports.ubuntu.com/ubuntu-ports focal/multiverse armhf Packages
ubuntu at ubuntu:~$ cat /proc/device-tree/model; echo
Raspberry Pi Compute Module 4 Rev 1.0
ubuntu at ubuntu:~$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether dc:a6:32:fe:ba:b0 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.56/24 brd 192.168.0.255 scope global dynamic eth0
       valid_lft 42801sec preferred_lft 42801sec
    inet6 fe80::dea6:32ff:fefe:bab0/64 scope link
       valid_lft forever preferred_lft forever
3: wlan0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether dc:a6:32:fe:ba:b1 brd ff:ff:ff:ff:ff:ff
ubuntu at ubuntu:~$


** Changed in: linux-firmware-raspi2 (Ubuntu)
       Status: Incomplete => Fix Released

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https://bugs.launchpad.net/bugs/1912385

Title:
  No wlan interfaces found on CM4 after firmware update

Status in linux-firmware-raspi2 package in Ubuntu:
  Fix Released

Bug description:
  During testing of image http://cdimage.ubuntu.com/ubuntu-
  server/focal/daily-preinstalled/pending/focal-preinstalled-server-
  arm64+raspi.img.xz it was noted that the WLAN interface was missing.

  It appears that the introduction of package version 3-0ubuntu1~20.04.1
  results in breakage of WLAN on CM4 devices.

  No interface is listed on completion of boot.

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