Comment 0 for bug 1852740

· Ubuntu version: 18.04.3 LTS

$ uname -a
Linux diego-PE62 4.15.0-70-generic #79-Ubuntu SMP Tue Nov 12 10:36:11 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

$ apt-cache policy linux-firmware
linux-firmware:
  Installed: 1.173.12
  Candidate: 1.173.12
  Version table:
 *** 1.173.12 500
        500 http://es.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
        500 http://es.archive.ubuntu.com/ubuntu bionic-updates/main i386 Packages
        500 http://security.ubuntu.com/ubuntu bionic-security/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu bionic-security/main i386 Packages
        100 /var/lib/dpkg/status
     1.173 500
        500 http://es.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
        500 http://es.archive.ubuntu.com/ubuntu bionic/main i386 Packages

· "No wifi adapter found", or by console, no entry for Wireless Controller

$ sudo rfkill list all
0: hci0: Bluetooth
 Soft blocked: no
 Hard blocked: no

$ iwconfig
eth0 no wireless extensions.

lo no wireless extensions.

$ sudo nmcli d
DEVICE TYPE STATE CONNECTION
eth0 ethernet connected Wired connection 1
lo loopback unmanaged --

· The Network controller is detected

$ sudo lshw -C network
  *-network
       description: Network controller
       product: Wireless-AC 9560 [Jefferson Peak]
       vendor: Intel Corporation
       physical id: 14.3
       bus info: pci@0000:00:14.3
       version: 10
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix bus_master cap_list
       configuration: driver=iwlwifi latency=0
       resources: irq:16 memory:a4414000-a4417fff
  *-network
       description: Ethernet interface
       product: QCA8171 Gigabit Ethernet
       vendor: Qualcomm Atheros
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: eth0
       version: 10
       serial: 30:9c:23:ff:70:4e
       size: 100Mbit/s
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm pciexpress msi msix bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=alx duplex=full ip=192.168.0.171 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s
       resources: irq:19 memory:a4300000-a433ffff ioport:3000(size=128)

· Seems to be due to this Microcode error, but could be another problem

$ sudo dmesg | grep iwlwifi
[ 4.467451] iwlwifi 0000:00:14.3: loaded firmware version 34.0.0 op_mode iwlmvm
[ 4.491873] iwlwifi 0000:00:14.3: Detected Intel(R) Dual Band Wireless AC 9462, REV=0x318
[ 4.537038] iwlwifi 0000:00:14.3: Microcode SW error detected. Restarting 0x0.
[ 4.537043] iwlwifi 0000:00:14.3: Not valid error log pointer 0x00000000 for Init uCode
[ 4.537112] iwlwifi 0000:00:14.3: SecBoot CPU1 Status: 0x3, CPU2 Status: 0x2459
[ 4.537114] iwlwifi 0000:00:14.3: Failed to start INIT ucode: -5
[ 4.549567] iwlwifi 0000:00:14.3: Failed to run INIT ucode: -5