Re: Bluetooth devices get disconnected.

[Jiri Kanicky <j@ganomi.com>]

Hi,

So the issue was most likely related to iwlwifi modue (Network 
controller: Intel Corporation Wireless 8260 (rev 3a)). After adding the 
following options for iwlwifi the issue disappeared and the mouse is 
working fine.

$ cat /etc/modprobe.d/iwlwifi.conf
options iwlwifi bt_coex_active=0 swcrypto=1 11n_disable=8 led_mode=3

-Jiri


On 12/12/17 23:44, Jiri Kanicky wrote:
> Hi.
>
> I am running Debian Sid with KDE. I have Logitech MX 2 and Bose 
> Bluetooth headphones. I experience disconnects very often.
>
> I tried to use different configuration, but nothing seems to work.
>
> After running the following the mouse gets connected again, and I can 
> reconnect BT headphones also. However the devices get disconnected 
> again in 1, 5 or 10 minutes again:
> hciconfig hci0 sspmode 1
> hciconfig hci0 down
> hciconfig hci0 up
>
> I also noticed that when the mouse is working I see the following:
>
> $ hciconfig -a
> hci0:   Type: Primary  Bus: USB
>         BD Address: 28:16:AD:B6:2A:0A  ACL MTU: 1021:4  SCO MTU: 96:6
>         UP RUNNING
>         RX bytes:21923293 acl:792631 sco:0 events:111597 errors:0
>         TX bytes:10619740 acl:18458 sco:0 commands:1832 errors:0
>         Features: 0xbf 0xfe 0x0f 0xfe 0xdb 0xff 0x7b 0x87
>         Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
>         Link policy: RSWITCH SNIFF
>         Link mode: SLAVE ACCEPT
>         Name: 'supermanbt'
>         Class: 0x1c010c
>         Service Classes: Rendering, Capturing, Object Transfer
>         Device Class: Computer, Laptop
>         HCI Version: 4.2 (0x8)  Revision: 0x100
>         LMP Version: 4.2 (0x8)  Subversion: 0x100
>         Manufacturer: Intel Corp. (2)
>
>
> After disconnect I can see the following:
>
> $ hciconfig -a
> hci0:   Type: Primary  Bus: USB
>         BD Address: 28:16:AD:B6:2A:0A  ACL MTU: 1021:4  SCO MTU: 96:6
>         UP RUNNING PSCAN
>         RX bytes:22096318 acl:800070 sco:0 events:113012 errors:0
>         TX bytes:11042199 acl:19322 sco:0 commands:2053 errors:0
>         Features: 0xbf 0xfe 0x0f 0xfe 0xdb 0xff 0x7b 0x87
>         Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
>         Link policy: RSWITCH SNIFF
>         Link mode: SLAVE ACCEPT
>         Name: 'Bluemoon Universal Bluetooth Host Controller'
>         Class: 0x000000
>         Service Classes: Unspecified
>         Device Class: Miscellaneous,
>         HCI Version: 4.2 (0x8)  Revision: 0x100
>         LMP Version: 4.2 (0x8)  Subversion: 0x100
>         Manufacturer: Intel Corp. (2)
>
> I also configured blutoothd with -d option, but I don't see any 
> specific messages when the devices disconnect.
>
> Any thoughts how to fix it or debug it? Is this general bluetooth 
> issue or KDE bluedevil problem?
>
> Thanks Jiri