Public bug reported:
When I upgraded an older Macbook Air (running Ubuntu 18.04.4) from
kernel 4.15 to 5.5, the wifi adapter no longer worked. The system was
reporting that there were no wifi adapters found.
I did research, tried some of the suggested changes (mostly installing
the DEB package with the Broadcom kernel source) and had no luck getting
wifi to work.
Installed kernel 5.3.18 and the wifi adapter is found and is working.
cat /proc/version_signature returns 'no such file'
lscpi -vnvn returns (for the wifi adapter):
03:00.0 Network controller [0280]: Broadcom Inc. and subsidiaries BCM4360
802.11ac Wireless Network Adapter [14e4:43a0] (rev 03)
Subsystem: Apple Inc. BCM4360 802.11ac Wireless Network Adapter
[106b:0117]
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort+ <TAbort-
<MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 256 bytes
Interrupt: pin A routed to IRQ 0
Region 0: Memory at b0600000 (64-bit, non-prefetchable) [size=32K]
Region 2: Memory at b0400000 (64-bit, non-prefetchable) [size=2M]
Capabilities: [48] Power Management version 3
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA
PME(D0+,D1+,D2+,D3hot+,D3cold+)
Status: D3 NoSoftRst+ PME-Enable- DSel=0 DScale=2 PME-
Capabilities: [58] MSI: Enable- Count=1/1 Maskable- 64bit+
Address: 0000000000000000 Data: 0000
Capabilities: [68] Vendor Specific Information: Len=44 <?>
Capabilities: [ac] Express (v2) Endpoint, MSI 00
DevCap: MaxPayload 256 bytes, PhantFunc 0, Latency L0s <4us, L1
unlimited
ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset-
SlotPowerLimit 10.000W
DevCtl: Report errors: Correctable- Non-Fatal- Fatal-
Unsupported-
RlxdOrd+ ExtTag- PhantFunc- AuxPwr+ NoSnoop+
MaxPayload 128 bytes, MaxReadReq 1024 bytes
DevSta: CorrErr- UncorrErr+ FatalErr- UnsuppReq- AuxPwr+
TransPend-
LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Exit
Latency L0s <2us, L1 <32us
ClockPM+ Surprise- LLActRep- BwNot- ASPMOptComp+
LnkCtl: ASPM L0s L1 Enabled; RCB 64 bytes Disabled- CommClk+
ExtSynch- ClockPM+ AutWidDis- BWInt- AutBWInt-
LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+
DLActive- BWMgmt- ABWMgmt-
DevCap2: Completion Timeout: Range ABCD, TimeoutDis+, LTR+,
OBFF Via WAKE#
DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR+,
OBFF Disabled
LnkCtl2: Target Link Speed: 2.5GT/s, EnterCompliance- SpeedDis-
Transmit Margin: Normal Operating Range,
EnterModifiedCompliance- ComplianceSOS-
Compliance De-emphasis: -6dB
LnkSta2: Current De-emphasis Level: -3.5dB,
EqualizationComplete-, EqualizationPhase1-
EqualizationPhase2-, EqualizationPhase3-,
LinkEqualizationRequest-
Capabilities: [100 v1] Advanced Error Reporting
UESta: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt-
RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
UEMsk: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt-
RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
UESvrt: DLP+ SDES+ TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt-
RxOF+ MalfTLP+ ECRC- UnsupReq- ACSViol-
CESta: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr-
CEMsk: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+
AERCap: First Error Pointer: 00, GenCap+ CGenEn- ChkCap+ ChkEn-
Capabilities: [13c v1] Device Serial Number 48-d7-00-ff-ff-00-00-01
Capabilities: [150 v1] Power Budgeting <?>
Capabilities: [160 v1] Virtual Channel
Caps: LPEVC=0 RefClk=100ns PATEntryBits=1
Arb: Fixed- WRR32- WRR64- WRR128-
Ctrl: ArbSelect=Fixed
Status: InProgress-
VC0: Caps: PATOffset=00 MaxTimeSlots=1 RejSnoopTrans-
Arb: Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256-
Ctrl: Enable+ ID=0 ArbSelect=Fixed TC/VC=ff
Status: NegoPending- InProgress-
Capabilities: [1b0 v1] Latency Tolerance Reporting
Max snoop latency: 3145728ns
Max no snoop latency: 3145728ns
Capabilities: [220 v1] #15
Kernel modules: bcma
lsb_release returns:
Description: Ubuntu 18.04.4 LTS
Release: 18.04
apt-cache for the driver kernel source returns:
bcmwl-kernel-source:
Installed: 6.30.223.271+bdcom-0ubuntu5
Candidate: 6.30.223.271+bdcom-0ubuntu5
Version table:
*** 6.30.223.271+bdcom-0ubuntu5 100
100 /var/lib/dpkg/status
6.30.223.271+bdcom-0ubuntu5~18.04.1 500
500 http://us.archive.ubuntu.com/ubuntu bionic-updates/restricted amd64
Packages
6.30.223.271+bdcom-0ubuntu4 500
500 http://us.archive.ubuntu.com/ubuntu bionic/restricted amd64 Packages
What I expected to happen: Wifi connection (and icon showing in status bar)
What happened instead: WiFi adapter not found.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
** Tags: bionic
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https://bugs.launchpad.net/bugs/1866697
Title:
Kernel 5.5.x Does Not Support BCM4360 WiFi Adapter
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