Bug 206169

Summary: iwlwifi 0000:01:00.0: Microcode SW error detected. Restarting 0x2000000.
Product: Drivers Reporter: Martin Mokrejs (mmokrejs)
Component: network-wireless-intelAssignee: Default virtual assignee for network-wireless-intel (drivers_network-wireless-intel)
Status: NEW ---    
Severity: normal CC: kernel, linuxwifi, pedretti.fabio, t.clastres
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 5.4.6 Subsystem:
Regression: No Bisected commit-id:
Attachments: dmesg with firmware stack dump

Description Martin Mokrejs 2020-01-11 23:45:59 UTC 
Hi,
  I realized the following dump in syslog. I am not aware of any issue aside some CPU fan noise, but admitedly i was using wired connection now so I did not really use wireless at the moment.

  I will attach the stacktrace.

  Some more info:

dell_e5580 ~ # ethtool -i wlp1s0 | grep firmware
firmware-version: 36.77d01142.0
dell_e5580 ~ #
Comment 1 Martin Mokrejs 2020-01-11 23:47:29 UTC 
Created attachment 286765 [details]
dmesg with firmware stack dump
Comment 2 Martin Mokrejs 2020-01-11 23:48:47 UTC 
dell_e5580 ~ # lspci -s 01:00.0 -vv
01:00.0 Network controller: Intel Corporation Wireless 8265 / 8275 (rev 78)
	Subsystem: Intel Corporation Wireless 8265 / 8275
	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
	Interrupt: pin A routed to IRQ 132
	Region 0: Memory at ef200000 (64-bit, non-prefetchable) [size=8K]
	Capabilities: [c8] Power Management version 3
		Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
		Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
		Address: 00000000fee003b8  Data: 0000
	Capabilities: [40] Express (v2) Endpoint, MSI 00
		DevCap:	MaxPayload 128 bytes, PhantFunc 0, Latency L0s <512ns, L1 unlimited
			ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset+ SlotPowerLimit 0.000W
		DevCtl:	CorrErr- NonFatalErr- FatalErr- UnsupReq-
			RlxdOrd+ ExtTag- PhantFunc- AuxPwr+ NoSnoop+ FLReset-
			MaxPayload 128 bytes, MaxReadReq 128 bytes
		DevSta:	CorrErr+ NonFatalErr- FatalErr- UnsupReq+ AuxPwr+ TransPend-
		LnkCap:	Port #0, Speed 2.5GT/s, Width x1, ASPM L1, Exit Latency L1 <8us
			ClockPM+ Surprise- LLActRep- BwNot- ASPMOptComp+
		LnkCtl:	ASPM L1 Enabled; RCB 64 bytes Disabled- CommClk+
			ExtSynch- ClockPM+ AutWidDis- BWInt- AutBWInt-
		LnkSta:	Speed 2.5GT/s (ok), Width x1 (ok)
			TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
		DevCap2: Completion Timeout: Range B, TimeoutDis+, LTR+, OBFF Via WAKE#
			 AtomicOpsCap: 32bit- 64bit- 128bitCAS-
		DevCtl2: Completion Timeout: 16ms to 55ms, TimeoutDis-, LTR+, OBFF Disabled
			 AtomicOpsCtl: ReqEn-
		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- AdvNonFatalErr-
		CEMsk:	RxErr- BadTLP- BadDLLP- Rollover- Timeout- AdvNonFatalErr+
		AERCap:	First Error Pointer: 00, ECRCGenCap- ECRCGenEn- ECRCChkCap- ECRCChkEn-
			MultHdrRecCap- MultHdrRecEn- TLPPfxPres- HdrLogCap-
		HeaderLog: 00000000 00000000 00000000 00000000
	Capabilities: [140 v1] Device Serial Number cc-2f-71-ff-ff-6f-46-bd
	Capabilities: [14c v1] Latency Tolerance Reporting
		Max snoop latency: 3145728ns
		Max no snoop latency: 3145728ns
	Capabilities: [154 v1] L1 PM Substates
		L1SubCap: PCI-PM_L1.2+ PCI-PM_L1.1+ ASPM_L1.2+ ASPM_L1.1+ L1_PM_Substates+
			  PortCommonModeRestoreTime=30us PortTPowerOnTime=18us
		L1SubCtl1: PCI-PM_L1.2+ PCI-PM_L1.1+ ASPM_L1.2+ ASPM_L1.1+
			   T_CommonMode=0us LTR1.2_Threshold=163840ns
		L1SubCtl2: T_PwrOn=60us
	Kernel driver in use: iwlwifi

dell_e5580 ~ #
Comment 3 Martin Mokrejs 2020-01-12 10:19:21 UTC 
I recompiled 5.4.10 kernel, here is a snippet from dmesg after bootup:

[    4.437760] iwlwifi 0000:01:00.0: enabling device (0000 -> 0002)
[    4.440914] iwlwifi 0000:01:00.0: Found debug destination: EXTERNAL_DRAM
[    4.440919] iwlwifi 0000:01:00.0: Found debug configuration: 0
[    4.441236] iwlwifi 0000:01:00.0: loaded firmware version 36.77d01142.0 op_mode iwlmvm
[    4.441275] iwlwifi 0000:01:00.0: Detected Intel(R) Dual Band Wireless AC 8265, REV=0x230
[    4.449854] iwlwifi 0000:01:00.0: Applying debug destination EXTERNAL_DRAM
[    4.450065] iwlwifi 0000:01:00.0: Allocated 0x00400000 bytes for firmware monitor.