The problem also affects the "airplane mode". The loss of wifi connectivity can be restored by entering and exiting airplane mode provides the option to reenable the wifi board. Additionally, using the fn+ key combination airplane mode can be manually entered, but not exited. (which seems to be a common 18.04 problem, with a simple web search).
I have just updated to the latest Dell firmware version for this device with no improvement. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788073 Title: Wifi adapter not found after suspend (iwlwifi) Status in linux package in Ubuntu: Incomplete Bug description: Hello, I am finding that the network adapter " Network controller: Intel Corporation Wireless 7260 (rev bb) " (iwlwifi) is reported as disabled, or not present after a lengthy suspend. This is an identical issue to those reported for Realtek, but I have not found an existing report for Intel. https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1779817 This was no a problem in 16.04 or 17.10 with the identical hardware. 18.04 was installed clean. Happy to provide more information, however, I am not exactly sure what information to provide? Thanks in advance, Description: Ubuntu 18.04.1 LTS Release: 18.04 02:00.0 Network controller [0280]: Intel Corporation Wireless 7260 [8086:08b1] (rev bb) Subsystem: Intel Corporation Dual Band Wireless-AC 7260 [8086:4070] 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: 64 bytes Interrupt: pin A routed to IRQ 46 Region 0: Memory at e3500000 (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: 00000000fee08004 Data: 4022 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: Report errors: Correctable- Non-Fatal- Fatal- Unsupported- RlxdOrd+ ExtTag- PhantFunc- AuxPwr+ NoSnoop+ FLReset- MaxPayload 128 bytes, MaxReadReq 128 bytes DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend- LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Exit Latency L0s <4us, L1 <32us ClockPM+ Surprise- LLActRep- BwNot- ASPMOptComp- LnkCtl: ASPM 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 B, TimeoutDis+, LTR+, OBFF Via WAKE# DevCtl2: Completion Timeout: 16ms to 55ms, 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: [140 v1] Device Serial Number f0-42-1c-ff-ff-c7-15-8c Capabilities: [14c v1] Latency Tolerance Reporting Max snoop latency: 71680ns Max no snoop latency: 71680ns Capabilities: [154 v1] Vendor Specific Information: ID=cafe Rev=1 Len=014 <?> Kernel driver in use: iwlwifi Kernel modules: iwlwifi --- ProblemType: Bug ApportVersion: 2.20.9-0ubuntu7.4 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: hardy 1061 F.... pulseaudio /dev/snd/controlC0: hardy 1061 F.... pulseaudio CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 18.04 InstallationDate: Installed on 2018-10-11 (0 days ago) InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) MachineType: Dell Inc. Inspiron 7537 Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-36-generic root=UUID=8686f213-39e9-4bc8-9a27-d3bf664af82c ro quiet splash vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-36.39-generic 4.15.18 RelatedPackageVersions: linux-restricted-modules-4.15.0-36-generic N/A linux-backports-modules-4.15.0-36-generic N/A linux-firmware 1.173.1 Tags: bionic Uname: Linux 4.15.0-36-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 05/24/2018 dmi.bios.vendor: Dell Inc. dmi.bios.version: A16 dmi.board.name: 0MFY55 dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnDellInc.:bvrA16:bd05/24/2018:svnDellInc.:pnInspiron7537:pvr:rvnDellInc.:rn0MFY55:rvrA00:cvnDellInc.:ct8:cvr0.1: dmi.product.family: Shark Bay ULT dmi.product.name: Inspiron 7537 dmi.sys.vendor: Dell Inc. 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