On Sun, Dec 02, 2018 at 06:57:35AM +0000, Grumbach, Emmanuel wrote: > > 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. It's worth looking, but I don't understand how a BIOS switch would solve this problem. I assume that with the same BIOS settings, Windows works and Linux fails. Maybe there would be a clue in an acpidump from affected machines, e.g., maybe we'd see some kind of ACPI hotplug notification. That seems like a long shot because we do have acpiphp in the kernel, and it *should* be handling such notifications, but it could always be broken. The Windows device manager info (requested above) would be interesting. Bjorn
