RE: Fwd: [Bug 201647] New: Intel Wireless card 3165 does not get detected but bluetooth works

From: Grumbach, Emmanuel
Date: Sun Dec 02 2018 - 01:58:21 EST


>
> [+cc Emmanuel, LKML]
>
> On Fri, Nov 09, 2018 at 03:43:06PM -0600, Bjorn Helgaas wrote:
> > ---------- Forwarded message ---------
> > From: <bugzilla-daemon@xxxxxxxxxxxxxxxxxxx>
> > Date: Fri, Nov 9, 2018 at 4:10 AM
> > Subject: [Bug 201647] New: Intel Wireless card 3165 does not get
> > detected but bluetooth works
> >
> > https://bugzilla.kernel.org/show_bug.cgi?id=201647
> >
> > Bug ID: 201647
> > Summary: Intel Wireless card 3165 does not get detected but
> > bluetooth works
> > Product: Drivers
> > Version: 2.5
> > Kernel Version: 4.19.1
> > Hardware: Intel
> > OS: Linux
> > Tree: Mainline
> > Status: NEW
> > Severity: high
> > Priority: P1
> > Component: PCI
> > Assignee: drivers_pci@xxxxxxxxxxxxxxxxxxxx
> > Reporter: Mertarg10@xxxxxxxxx
> > Regression: No
> >
> > This bug affects most of the devices with a Celeron N4000 and an Intel
> > wifi 3165 Ac adapter.
> >
> > When using Linux wifi is not working however, Bluetooth is working
> > fine. Also, Bluetooth part of this chip is connected via btusb and
> > the wifi part of this chip is connected via PCIe.
>
> Can you attach a screenshot of the Windows 10 device manager info for the
> wifi adapter to the bugzilla? If you can get a raw hex dump of its config
> space, that would be awesome.
>
> Also attach a copy of your kernel .config file (typically in /boot/).
>
> My only guess is that maybe the system keeps wifi completely powered
> down and uses hotplug to add it when needed. [1] mentions wifi being on
> pcibus 1 under Windows. Your lspci does show bridge 00:13.0 leading to bus
> 01, but Linux doesn't find any devices on bus 01.
>
> Hotplug could be done via either acpiphp (ACPI mediated hotplug) or pciehp
> (native PCIe hotplug). Your dmesg shows you do have acpiphp.
>
> I can't tell about pciehp (your .config will show that), but I think pciehp will
> only claim bridges where SltCap contains HotPlug+, and yours shows HotPlug-
> , so I don't think pciehp will do anything on your system.
>
> Even if the system does use hotplug, I don't know what mechanism the OS
> would use to wake up the device, since we don't know it even exists. I guess
> there could be some magic switch accessible via USB.
> But if that were the case, I'm sure Emmanuel would know about it.
>

Hm... Don't be so sure... :)
I don't think we have anything as fancy as this.
I guess you can try to dig into the BIOS settings?
I have heard of such a switch that would make the device disappear.