As I suspected the cause was in hardware, and specifically due to the motherboard using Master Write 0-wait state access, which meant the device had not completed mapping its registers into the PCI Config address space when the kernel probed for the Vendor ID.
User applied my recommended BIOS configuration changes and the device is now correctly identified. The solution is to alter the BIOS settings. In this case the "LDT and PCI Bus Control", and set "PCI1/PCI2 Master 0 WS Write" to Disabled to enforce 1 wait state. The device also had to be in ports PC1 or PCI2 (nearest the AGP slot) on this Abit KV8-MAX3 mobo. ** Summary changed: - PCI device has incorrect Vendor:Device ID when Southbridge used 0 wait reads + PCI device has incorrect Vendor:Device ID when Southbridge used 0 wait writes -- 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/1513477 Title: PCI device has incorrect Vendor:Device ID when Southbridge used 0 wait writes Status in linux package in Ubuntu: Invalid Bug description: No wifi connection showing, wifi network card is unclaimed ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-generic 4.2.0.16.18 ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3 Uname: Linux 4.2.0-16-generic x86_64 ApportVersion: 2.19.2-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: lotuspsychje 1410 F.... pulseaudio CurrentDesktop: Unity Date: Thu Nov 5 14:57:40 2015 HibernationDevice: RESUME=UUID=c391bf39-6cd0-4357-89f6-46b8c496b553 InstallationDate: Installed on 2015-10-28 (8 days ago) InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) IwConfig: lo no wireless extensions. enp0s14 no wireless extensions. ProcFB: 0 radeondrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-16-generic root=UUID=c53d01a4-d573-4ab2-ad75-f2c8bd8645c3 ro pci=realloc RelatedPackageVersions: linux-restricted-modules-4.2.0-16-generic N/A linux-backports-modules-4.2.0-16-generic N/A linux-firmware 1.152 RfKill: SourcePackage: linux UdevLog: Error: [Errno 2] Bestand of map bestaat niet: '/var/log/udev' UpgradeStatus: Upgraded to xenial on 2015-10-28 (8 days ago) dmi.bios.date: 06/29/2004 dmi.bios.vendor: Phoenix Technologies, LTD dmi.bios.version: 6.00 PG dmi.board.name: KV8-MAX3 (VIA K8T800-8237) dmi.board.vendor: http://www.abit.com.tw/ dmi.board.version: 1.x dmi.chassis.type: 3 dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvr6.00PG:bd06/29/2004:svn:pn:pvr:rvnhttp//www.abit.com.tw/:rnKV8-MAX3(VIAK8T800-8237):rvr1.x:cvn:ct3:cvr: To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1513477/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp