Bluetooth Issue

WetGeek · Jan 6, 2021

00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor DRAM Controller (rev 06)
	Subsystem: Dell Xeon E3-1200 v3/4th Gen Core Processor DRAM Controller
	Flags: bus master, fast devsel, latency 0
	Capabilities: [e0] Vendor Specific Information: Len=0c <?>

00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor PCI Express x16 Controller (rev 06) (prog-if 00 [Normal decode])
	Flags: bus master, fast devsel, latency 0, IRQ 26
	Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
	I/O behind bridge: 0000e000-0000efff [size=4K]
	Memory behind bridge: f4000000-f50fffff [size=17M]
	Prefetchable memory behind bridge: 00000000e0000000-00000000f1ffffff [size=288M]
	Capabilities: [88] Subsystem: Dell Xeon E3-1200 v3/4th Gen Core Processor PCI Express x16 Controller
	Capabilities: [80] Power Management version 3
	Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
	Capabilities: [a0] Express Root Port (Slot+), MSI 00
	Capabilities: [100] Virtual Channel
	Capabilities: [140] Root Complex Link
	Capabilities: [d94] Secondary PCI Express
	Kernel driver in use: pcieport

00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06) (prog-if 00 [VGA controller])
	DeviceName:  Onboard IGD
	Subsystem: Dell 4th Gen Core Processor Integrated Graphics Controller
	Flags: bus master, fast devsel, latency 0, IRQ 39
	Memory at f5400000 (64-bit, non-prefetchable) [size=4M]
	Memory at d0000000 (64-bit, prefetchable) [size=256M]
	I/O ports at f000 [size=64]
	Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
	Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
	Capabilities: [d0] Power Management version 2
	Capabilities: [a4] PCI Advanced Features
	Kernel driver in use: i915

00:03.0 Audio device: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller (rev 06)
	Subsystem: Dell Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller
	Flags: bus master, fast devsel, latency 0, IRQ 41
	Memory at f7834000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: [50] Power Management version 2
	Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit-
	Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
	Kernel driver in use: snd_hda_intel

00:14.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB xHCI (rev 04) (prog-if 30 [XHCI])
	Subsystem: Dell 8 Series/C220 Series Chipset Family USB xHCI
	Flags: bus master, medium devsel, latency 0, IRQ 35
	Memory at f7820000 (64-bit, non-prefetchable) [size=64K]
	Capabilities: [70] Power Management version 2
	Capabilities: [80] MSI: Enable+ Count=1/8 Maskable- 64bit+
	Kernel driver in use: xhci_hcd

00:16.0 Communication controller: Intel Corporation 8 Series/C220 Series Chipset Family MEI Controller #1 (rev 04)
	Subsystem: Dell 8 Series/C220 Series Chipset Family MEI Controller
	Flags: bus master, fast devsel, latency 0, IRQ 37
	Memory at f7840000 (64-bit, non-prefetchable) [size=16]
	Capabilities: [50] Power Management version 3
	Capabilities: [8c] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Kernel driver in use: mei_me


00:16.3 Serial controller: Intel Corporation 8 Series/C220 Series Chipset Family KT Controller (rev 04) (prog-if 02 [16550])
	Subsystem: Dell 8 Series/C220 Series Chipset Family KT Controller
	Flags: 66MHz, fast devsel, IRQ 19
	I/O ports at f0e0 [size=8]
	Memory at f783e000 (32-bit, non-prefetchable) [size=4K]
	Capabilities: [c8] Power Management version 3
	Capabilities: [d0] MSI: Enable- Count=1/1 Maskable- 64bit+
	Kernel driver in use: serial

00:19.0 Ethernet controller: Intel Corporation Ethernet Connection I217-LM (rev 04)
	DeviceName:  Onboard LAN
	Subsystem: Dell Ethernet Connection I217-LM
	Flags: bus master, fast devsel, latency 0, IRQ 36
	Memory at f7800000 (32-bit, non-prefetchable) [size=128K]
	Memory at f783d000 (32-bit, non-prefetchable) [size=4K]
	I/O ports at f080 [size=32]
	Capabilities: [c8] Power Management version 2
	Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [e0] PCI Advanced Features
	Kernel driver in use: e1000e

00:1a.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #2 (rev 04) (prog-if 20 [EHCI])
	Subsystem: Dell 8 Series/C220 Series Chipset Family USB EHCI
	Flags: bus master, medium devsel, latency 0, IRQ 16
	Memory at f783c000 (32-bit, non-prefetchable) [size=1K]
	Capabilities: [50] Power Management version 2
	Capabilities: [58] Debug port: BAR=1 offset=00a0
	Capabilities: [98] PCI Advanced Features
	Kernel driver in use: ehci-pci


00:1b.0 Audio device: Intel Corporation 8 Series/C220 Series Chipset High Definition Audio Controller (rev 04)
	Subsystem: Dell 8 Series/C220 Series Chipset High Definition Audio Controller
	Flags: bus master, fast devsel, latency 0, IRQ 40
	Memory at f7830000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: [50] Power Management version 2
	Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
	Capabilities: [100] Virtual Channel
	Kernel driver in use: snd_hda_intel

00:1c.0 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #1 (rev d4) (prog-if 00 [Normal decode])
	Flags: bus master, fast devsel, latency 0, IRQ 27
	Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
	I/O behind bridge: 00002000-00002fff [size=4K]
	Memory behind bridge: cf200000-cf3fffff [size=2M]
	Prefetchable memory behind bridge: 00000000cf400000-00000000cf5fffff [size=2M]
	Capabilities: [40] Express Root Port (Slot+), MSI 00
	Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
	Capabilities: [90] Subsystem: Dell 8 Series/C220 Series Chipset Family PCI Express Root Port
	Capabilities: [a0] Power Management version 3
	Kernel driver in use: pcieport

00:1c.2 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #3 (rev d4) (prog-if 00 [Normal decode])
	Flags: bus master, fast devsel, latency 0, IRQ 28
	Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
	I/O behind bridge: [disabled]
	Memory behind bridge: f7700000-f77fffff [size=1M]
	Prefetchable memory behind bridge: [disabled]
	Capabilities: [40] Express Root Port (Slot+), MSI 00
	Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
	Capabilities: [90] Subsystem: Dell 8 Series/C220 Series Chipset Family PCI Express Root Port
	Capabilities: [a0] Power Management version 3
	Kernel driver in use: pcieport

00:1c.3 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #4 (rev d4) (prog-if 00 [Normal decode])
	Flags: bus master, fast devsel, latency 0, IRQ 29
	Bus: primary=00, secondary=04, subordinate=07, sec-latency=0
	I/O behind bridge: 0000d000-0000dfff [size=4K]
	Memory behind bridge: f6c00000-f75fffff [size=10M]
	Prefetchable memory behind bridge: 00000000f3500000-00000000f3efffff [size=10M]
	Capabilities: [40] Express Root Port (Slot+), MSI 00
	Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
	Capabilities: [90] Subsystem: Dell 8 Series/C220 Series Chipset Family PCI Express Root Port
	Capabilities: [a0] Power Management version 3
	Kernel driver in use: pcieport

00:1c.4 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #5 (rev d4) (prog-if 00 [Normal decode])
	Flags: bus master, fast devsel, latency 0, IRQ 30
	Bus: primary=00, secondary=08, subordinate=08, sec-latency=0
	I/O behind bridge: 0000c000-0000cfff [size=4K]
	Memory behind bridge: f6200000-f6bfffff [size=10M]
	Prefetchable memory behind bridge: 00000000f2b00000-00000000f34fffff [size=10M]
	Capabilities: [40] Express Root Port (Slot+), MSI 00
	Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
	Capabilities: [90] Subsystem: Dell 8 Series/C220 Series Chipset Family PCI Express Root Port
	Capabilities: [a0] Power Management version 3
	Kernel driver in use: pcieport

00:1c.6 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #7 (rev d4) (prog-if 00 [Normal decode])
	Flags: bus master, fast devsel, latency 0, IRQ 31
	Bus: primary=00, secondary=09, subordinate=10, sec-latency=0
	I/O behind bridge: 0000a000-0000bfff [size=8K]
	Memory behind bridge: f5800000-f61fffff [size=10M]
	Prefetchable memory behind bridge: 00000000f2100000-00000000f2afffff [size=10M]
	Capabilities: [40] Express Root Port (Slot+), MSI 00
	Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
	Capabilities: [90] Subsystem: Dell 8 Series/C220 Series Chipset Family PCI Express Root Port
	Capabilities: [a0] Power Management version 3
	Kernel driver in use: pcieport

00:1c.7 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #8 (rev d4) (prog-if 00 [Normal decode])
	Flags: bus master, fast devsel, latency 0, IRQ 32
	Bus: primary=00, secondary=11, subordinate=11, sec-latency=0
	I/O behind bridge: [disabled]
	Memory behind bridge: f7600000-f76fffff [size=1M]
	Prefetchable memory behind bridge: [disabled]
	Capabilities: [40] Express Root Port (Slot+), MSI 00
	Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
	Capabilities: [90] Subsystem: Dell 8 Series/C220 Series Chipset Family PCI Express Root Port
	Capabilities: [a0] Power Management version 3
	Kernel driver in use: pcieport


00:1d.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #1 (rev 04) (prog-if 20 [EHCI])
	Subsystem: Dell 8 Series/C220 Series Chipset Family USB EHCI
	Flags: bus master, medium devsel, latency 0, IRQ 21
	Memory at f783b000 (32-bit, non-prefetchable) [size=1K]
	Capabilities: [50] Power Management version 2
	Capabilities: [58] Debug port: BAR=1 offset=00a0
	Capabilities: [98] PCI Advanced Features
	Kernel driver in use: ehci-pci

00:1f.0 ISA bridge: Intel Corporation QM87 Express LPC Controller (rev 04)
	Subsystem: Dell QM87 Express LPC Controller
	Flags: bus master, medium devsel, latency 0
	Capabilities: [e0] Vendor Specific Information: Len=0c <?>
	Kernel driver in use: lpc_ich

00:1f.2 RAID bus controller: Intel Corporation 82801 Mobile SATA Controller [RAID mode] (rev 04)
	Subsystem: Dell 82801 Mobile SATA Controller [RAID mode]
	Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 34
	I/O ports at f0d0 [size=8]
	I/O ports at f0c0 [size=4]
	I/O ports at f0b0 [size=8]
	I/O ports at f0a0 [size=4]
	I/O ports at f060 [size=32]
	Memory at f783a000 (32-bit, non-prefetchable) [size=2K]
	Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
	Capabilities: [70] Power Management version 3
	Capabilities: [a8] SATA HBA v1.0
	Kernel driver in use: ahci


00:1f.3 SMBus: Intel Corporation 8 Series/C220 Series Chipset Family SMBus Controller (rev 04)
	Subsystem: Dell 8 Series/C220 Series Chipset Family SMBus Controller
	Flags: medium devsel, IRQ 18
	Memory at f7839000 (64-bit, non-prefetchable) [size=256]
	I/O ports at f040 [size=32]
	Kernel driver in use: i801_smbus

01:00.0 VGA compatible controller: NVIDIA Corporation GK106GLM [Quadro K2100M] (rev a1) (prog-if 00 [VGA controller])
	Subsystem: Dell GK106GLM [Quadro K2100M]
	Flags: bus master, fast devsel, latency 0, IRQ 42
	Memory at f4000000 (32-bit, non-prefetchable) [size=16M]
	Memory at e0000000 (64-bit, prefetchable) [size=256M]
	Memory at f0000000 (64-bit, prefetchable) [size=32M]
	I/O ports at e000 [size=128]
	Expansion ROM at f5000000 [virtual] [disabled] [size=512K]
	Capabilities: [60] Power Management version 3
	Capabilities: [68] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [78] Express Endpoint, MSI 00
	Capabilities: [b4] Vendor Specific Information: Len=14 <?>
	Capabilities: [100] Virtual Channel
	Capabilities: [128] Power Budgeting <?>
	Capabilities: [600] Vendor Specific Information: ID=0001 Rev=1 Len=024 <?>
	Capabilities: [900] Secondary PCI Express
	Kernel driver in use: nvidia


01:00.1 Audio device: NVIDIA Corporation GK106 HDMI Audio Controller (rev a1)
	Subsystem: Dell GK106 HDMI Audio Controller
	Flags: bus master, fast devsel, latency 0, IRQ 17
	Memory at f5080000 (32-bit, non-prefetchable) [size=16K]
	Capabilities: [60] Power Management version 3
	Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+
	Capabilities: [78] Express Endpoint, MSI 00
	Kernel driver in use: snd_hda_intel

03:00.0 Network controller: Intel Corporation Wireless 7260 (rev 73)
	Subsystem: Intel Corporation Dual Band Wireless-AC 7260
	Flags: bus master, fast devsel, latency 0, IRQ 38
	Memory at f7700000 (64-bit, non-prefetchable) [size=8K]
	Capabilities: [c8] Power Management version 3
	Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [40] Express Endpoint, MSI 00
	Capabilities: [100] Advanced Error Reporting
	Capabilities: [140] Device Serial Number f8-16-54-ff-ff-45-d4-86
	Capabilities: [14c] Latency Tolerance Reporting
	Capabilities: [154] Vendor Specific Information: ID=cafe Rev=1 Len=014 <?>
	Kernel driver in use: iwlwifi

11:00.0 SD Host controller: O2 Micro, Inc. SD/MMC Card Reader Controller (rev 01) (prog-if 01)
	Subsystem: Dell SD/MMC Card Reader Controller
	Flags: bus master, fast devsel, latency 0, IRQ 33
	Memory at f7601000 (32-bit, non-prefetchable) [size=4K]
	Memory at f7600000 (32-bit, non-prefetchable) [size=2K]
	Capabilities: [6c] Power Management version 3
	Capabilities: [48] MSI: Enable+ Count=1/1 Maskable+ 64bit+
	Capabilities: [80] Express Endpoint, MSI 00
	Capabilities: [100] Virtual Channel
	Capabilities: [200] Advanced Error Reporting
	Capabilities: [230] Latency Tolerance Reporting
	Kernel driver in use: sdhci-pci

[deleted] · Jan 7, 2021

Hmm. Try this
echo "options iwlwifi bt_coex_active=N" | sudo tee /etc/modprobe.d/iwlwifi-coex.conf
And reboot.

In case you run into issues, you can just sudo rm /etc/modprobe.d/iwlwifi-coex.conf

WetGeek · Jan 7, 2021

[deleted] echo "options iwlwifi bt_coex_active=N" | sudo tee /etc/modprobe.d/iwlwifi-coex.conf

tee: /etc/modprobe.d/iwlwifi-coex.conf: No such file or directory

There is no card, and no dongle. Wi-fi is built into this Dell laptop. It's a DELL PRECISION M4200. The only USB devices in use are my wireless mouse and webcam.

I had no idea how an internal wi-fi radio might be identified on the PCI bus, so I sent all of it, but I knew from the start it wouldn't show up as a USB device. Thanks for all the help. It's now working for days at a time, instead of a couple hours at a time, so that's a big improvement.

[deleted] · Jan 7, 2021

WetGeek sudo mkdir -p /etc/modprobe.d

You can see it's shown by lspci, 03:00.0 Network controller: Intel Corporation Wireless 7260 (rev 73)

WetGeek · Jan 7, 2021

[deleted] Intel Corporation Wireless 7260 (rev 73)

Were you looking for a wireless device? Wireless has never given me a problem. It's the Bluetooth keyboard that sometimes stops unexpectedly.

[deleted] · Jan 7, 2021

WetGeek Intel 7260 has integrated bluetooth.

WetGeek · Jan 7, 2021

[deleted] Intel 7260 has integrated bluetooth.

Yes, it does. What I'm looking for is something that causes the Bluetooth keyboard to stop working, while the Bluetooth settings continue to report that Bluetooth is ON, and the keyboard is paired, and connected. All the while, the wi-fi network controller has never been a problem.

[deleted] · Jan 7, 2021

WetGeek Try out the suggestion here [deleted]

WetGeek · Jan 7, 2021

[deleted] Try out the suggestion here

Try it again?

[deleted] · Jan 7, 2021

WetGeek sudo mkdir -p /etc/modprobe.d
echo "options iwlwifi bt_coex_active=N" | sudo tee /etc/modprobe.d/iwlwifi-coex.conf

WetGeek · Jan 7, 2021

[deleted]

tee: /etc/modprobe.d/iwlwifi-coex.conf: No such file or directory
options iwlwifi bt_coex_active=N

[deleted] · Jan 7, 2021

WetGeek You didn't make the directory

WetGeek · Jan 7, 2021

[deleted] You didn't make the directory

Of course I didn't. I had no idea a new directory was needed.

I've never needed to create a directory in order for any other Bluetooth device (like my earbuds) to work right.

[deleted] · Jan 8, 2021

WetGeek I literally instructed you to do so in my previous post

WetGeek · Jan 8, 2021

[deleted] I literally instructed you to do so in my previous post

Sorry ... I must have thought that first line was a quote, or something. At any rate, the result of the query is the same:

options iwlwifi bt_coex_active=N

My keyboard is still working this morning, so something I've done during this adventure might have actually been the solution to this problem, but I won't know for sure until it's kept working longer than overnight. I'll know if it's really fixed when I only need to restart the laptop after each week's upgrades.

At any rate, thanks again for your help with this. I'm convinced it's a hardware issue, as I have another of these same keyboards connected to the media computer that streams content to my TV, and I've never experienced this issue with
that machine.

AW, RATS! Keyboard just quit. I'm typing this line on the laptop's keyboard. Did that modprobe result provide any useful clue as to whatever the root cause of the issue is?

[deleted] · Jan 8, 2021

WetGeek Yea, it's supposed to output that. But now it didn't complain about a missing directory so success.

What it did it was turn off the bluetooth coexistence feature of iwlwifi driver. That feature is known to cause issues with eg. audio streaming over Bluetooth when Wi-fi is enabled (as I told before, your Intel 7260 handles both wifi and bluetooth). So I thought it may be the culprit but apparently not, which is unfortunate.

If you wish to undo the changes, you can run sudo rm /etc/modprobe.d/iwlwifi-coex.conf which removes the modprobe file we created.

WetGeek · Jan 8, 2021

[deleted] f you wish to undo the changes,

There seems to be little reason to undo something that hasn't actually changed anything. As my arm continues slowly to heal, before too long I'll be able to reach the laptop on its stand, and type on it the way I always have done. I can keep this keyboard as a spare for the media computer. Until then, I'll just put up with restarting the laptop when I need to, and have a lot of typing to do.

Thanks again for your help. If you happen to think of anything else I should try, please let me know, but otherwise I'm going to just deal with it as best I can for now.

[deleted] · Jan 9, 2021

WetGeek Yeah I just wanted to point it out in case you run into issues with wifi due to the settings or something.

Have you tried to change the power saving setting in Control Center? I think there's a setting in the Power section that allows the system to turn off bluetooth to save power. Turn that setting off. I would give you clearer instructions but I use Plasma

WetGeek · Jan 9, 2021

[deleted] Turn that setting off.

Yes. I'd seen that before, but forgotten about it. I just turned it OFF, and will see what effect that has.

WetGeek · Jan 9, 2021

[deleted] Turn that setting off.

It turns out that the setting you mentioned is rather puzzling. I turned it OFF, and it immediately turned OFF Bluetooth. I couldn't get it working again until I turned the setting back on, shutdown, and restarted. Apparently if you don't give it the ability to turn off the Bluetooth based on some usage timeout or other signal, it takes that to mean that you want it to be turned off unconditionally.