Public bug reported:

Latest linux kernel completely kills my Wifi. Have had to use the GRUB
boot loader to revert the kernel back twice. Kernel 5.15.0-67 works
perfectly with my wifi.

In network settings the wifi option is entirely missing when I am on the
-69 version.

Output of command `lspci`:
➜  ~ lspci
00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse Root 
Complex
00:00.2 IOMMU: Advanced Micro Devices, Inc. [AMD] Starship/Matisse IOMMU
00:01.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe 
Dummy Host Bridge
00:01.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse GPP 
Bridge
00:01.2 PCI bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse GPP 
Bridge
00:02.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe 
Dummy Host Bridge
00:03.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe 
Dummy Host Bridge
00:03.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse GPP 
Bridge
00:04.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe 
Dummy Host Bridge
00:05.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe 
Dummy Host Bridge
00:07.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe 
Dummy Host Bridge
00:07.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse 
Internal PCIe GPP Bridge 0 to bus[E:B]
00:08.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe 
Dummy Host Bridge
00:08.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse 
Internal PCIe GPP Bridge 0 to bus[E:B]
00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller (rev 61)
00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge (rev 51)
00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: 
Function 0
00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: 
Function 1
00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: 
Function 2
00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: 
Function 3
00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: 
Function 4
00:18.5 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: 
Function 5
00:18.6 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: 
Function 6
00:18.7 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: 
Function 7
01:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd Device a80a
02:00.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] Matisse Switch Upstream
03:04.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] Matisse PCIe GPP Bridge
03:05.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] Matisse PCIe GPP Bridge
03:08.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] Matisse PCIe GPP Bridge
03:09.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] Matisse PCIe GPP Bridge
03:0a.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] Matisse PCIe GPP Bridge
04:00.0 Network controller: Broadcom Inc. and subsidiaries Device 43c3 (rev 04)
05:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 
PCI Express Gigabit Ethernet Controller (rev 26)
06:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. 
[AMD] Starship/Matisse Reserved SPP
06:00.1 USB controller: Advanced Micro Devices, Inc. [AMD] Matisse USB 3.0 Host 
Controller
06:00.3 USB controller: Advanced Micro Devices, Inc. [AMD] Matisse USB 3.0 Host 
Controller
07:00.0 SATA controller: Advanced Micro Devices, Inc. [AMD] FCH SATA Controller 
[AHCI mode] (rev 51)
08:00.0 SATA controller: Advanced Micro Devices, Inc. [AMD] FCH SATA Controller 
[AHCI mode] (rev 51)
09:00.0 VGA compatible controller: NVIDIA Corporation GP107 [GeForce GTX 1050 
Ti] (rev a1)
09:00.1 Audio device: NVIDIA Corporation GP107GL High Definition Audio 
Controller (rev a1)
0a:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. 
[AMD] Starship/Matisse PCIe Dummy Function
0b:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. 
[AMD] Starship/Matisse Reserved SPP
0b:00.1 Encryption controller: Advanced Micro Devices, Inc. [AMD] 
Starship/Matisse Cryptographic Coprocessor PSPCPP
0b:00.3 USB controller: Advanced Micro Devices, Inc. [AMD] Matisse USB 3.0 Host 
Controller
0b:00.4 Audio device: Advanced Micro Devices, Inc. [AMD] Starship/Matisse HD 
Audio Controller

Version log (but as noted, I have reverted my kernel version. It is the '-69' 
version which is the one that breaks the wifi, which I need for my work):
➜  ~ cat version.log 
Ubuntu 5.15.0-67.74~20.04.1-generic 5.15.85

I attach the much longer output of lspci-vnvn.log as a separate
attachment.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Incomplete


** Tags: kernel-bug

** Attachment added: "lspci-vnvn.log"
   
https://bugs.launchpad.net/bugs/2013186/+attachment/5658600/+files/lspci-vnvn.log

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https://bugs.launchpad.net/bugs/2013186

Title:
  5.15.0-69 breaks my wifi

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Latest linux kernel completely kills my Wifi. Have had to use the GRUB
  boot loader to revert the kernel back twice. Kernel 5.15.0-67 works
  perfectly with my wifi.

  In network settings the wifi option is entirely missing when I am on
  the -69 version.

  Output of command `lspci`:
  ➜  ~ lspci
  00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse Root 
Complex
  00:00.2 IOMMU: Advanced Micro Devices, Inc. [AMD] Starship/Matisse IOMMU
  00:01.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe 
Dummy Host Bridge
  00:01.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse GPP 
Bridge
  00:01.2 PCI bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse GPP 
Bridge
  00:02.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe 
Dummy Host Bridge
  00:03.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe 
Dummy Host Bridge
  00:03.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse GPP 
Bridge
  00:04.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe 
Dummy Host Bridge
  00:05.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe 
Dummy Host Bridge
  00:07.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe 
Dummy Host Bridge
  00:07.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse 
Internal PCIe GPP Bridge 0 to bus[E:B]
  00:08.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe 
Dummy Host Bridge
  00:08.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse 
Internal PCIe GPP Bridge 0 to bus[E:B]
  00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller (rev 
61)
  00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge (rev 51)
  00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: 
Function 0
  00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: 
Function 1
  00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: 
Function 2
  00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: 
Function 3
  00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: 
Function 4
  00:18.5 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: 
Function 5
  00:18.6 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: 
Function 6
  00:18.7 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: 
Function 7
  01:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd Device a80a
  02:00.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] Matisse Switch Upstream
  03:04.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] Matisse PCIe GPP Bridge
  03:05.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] Matisse PCIe GPP Bridge
  03:08.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] Matisse PCIe GPP Bridge
  03:09.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] Matisse PCIe GPP Bridge
  03:0a.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] Matisse PCIe GPP Bridge
  04:00.0 Network controller: Broadcom Inc. and subsidiaries Device 43c3 (rev 
04)
  05:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. 
RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 26)
  06:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. 
[AMD] Starship/Matisse Reserved SPP
  06:00.1 USB controller: Advanced Micro Devices, Inc. [AMD] Matisse USB 3.0 
Host Controller
  06:00.3 USB controller: Advanced Micro Devices, Inc. [AMD] Matisse USB 3.0 
Host Controller
  07:00.0 SATA controller: Advanced Micro Devices, Inc. [AMD] FCH SATA 
Controller [AHCI mode] (rev 51)
  08:00.0 SATA controller: Advanced Micro Devices, Inc. [AMD] FCH SATA 
Controller [AHCI mode] (rev 51)
  09:00.0 VGA compatible controller: NVIDIA Corporation GP107 [GeForce GTX 1050 
Ti] (rev a1)
  09:00.1 Audio device: NVIDIA Corporation GP107GL High Definition Audio 
Controller (rev a1)
  0a:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. 
[AMD] Starship/Matisse PCIe Dummy Function
  0b:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. 
[AMD] Starship/Matisse Reserved SPP
  0b:00.1 Encryption controller: Advanced Micro Devices, Inc. [AMD] 
Starship/Matisse Cryptographic Coprocessor PSPCPP
  0b:00.3 USB controller: Advanced Micro Devices, Inc. [AMD] Matisse USB 3.0 
Host Controller
  0b:00.4 Audio device: Advanced Micro Devices, Inc. [AMD] Starship/Matisse HD 
Audio Controller

  Version log (but as noted, I have reverted my kernel version. It is the '-69' 
version which is the one that breaks the wifi, which I need for my work):
  ➜  ~ cat version.log 
  Ubuntu 5.15.0-67.74~20.04.1-generic 5.15.85

  I attach the much longer output of lspci-vnvn.log as a separate
  attachment.

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