Public bug reported:

(note: It's unclear to me if that's a kernel regression or an issue with bluez)


I've been using this particular combination of Bluetooth mouse ("TECKNET 
BM306") & laptop ("Dell Latitude E7240") for over a year now.

It used to work with 18.04 and 17.10, but with 18.10 I'm encountering a
strange disconnect behaviour:

1) Mouse is working ok
2) Mouse suddenly stops
3) Disabling and enabling bluetooth on the laptop makes the mouse work again.

when this happens, dmesg reports:

[57812.977570] usb 1-1.3: reset full-speed USB device number 18 using
ehci-pci

Disabling bluetooth and enabling it again results in:

[57833.455866] usb 1-1.3: USB disconnect, device number 18
[57833.455948] Bluetooth: hci0: turning off Intel device LED failed (-19)
[57836.905656] usb 1-1.3: new full-speed USB device number 19 using ehci-pci
[57837.016248] usb 1-1.3: New USB device found, idVendor=8087, idProduct=07dc, 
bcdDevice= 0.01
[57837.016253] usb 1-1.3: New USB device strings: Mfr=0, Product=0, 
SerialNumber=0
[57837.030092] Bluetooth: hci0: read Intel version: 370710018002030d00
[57837.030169] Bluetooth: hci0: Intel Bluetooth firmware file: 
intel/ibt-hw-37.7.10-fw-1.80.2.3.d.bseq
[57837.251206] Bluetooth: hci0: Intel firmware patch completed and activated
[57841.724368] hid-generic 0005:0A5C:0001.001F: unknown main item tag 0x0
[57841.724587] input: TECKNET BM306 Mouse as 
/devices/pci0000:00/0000:00:1d.0/usb1/1-1/1-1.3/1-1.3:1.0/bluetooth/hci0/hci0:256/0005:0A5C:0001.001F/input/input78
[57841.724873] hid-generic 0005:0A5C:0001.001F: input,hidraw0: BLUETOOTH HID 
v1.29 Mouse [TECKNET BM306] on fc:f8:ae:45:3c:05

$ bluetoothctl --version
bluetoothctl: 5.50

$ hciconfig -a
hci0:   Type: Primary  Bus: USB
        BD Address: FC:F8:AE:45:3C:05  ACL MTU: 1021:5  SCO MTU: 96:5
        UP RUNNING PSCAN 
        RX bytes:52465 acl:3355 sco:0 events:222 errors:0
        TX bytes:28384 acl:13 sco:0 commands:170 errors:0
        Features: 0xff 0xfe 0x0f 0xfe 0xdb 0xff 0x7b 0x87
        Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3 
        Link policy: RSWITCH HOLD SNIFF 
        Link mode: SLAVE ACCEPT 
        Name: 'ChromeLinux_AA14'
        Class: 0x0c010c
        Service Classes: Rendering, Capturing
        Device Class: Computer, Laptop
        HCI Version: 4.0 (0x6)  Revision: 0x500
        LMP Version: 4.0 (0x6)  Subversion: 0x500
        Manufacturer: Intel Corp. (2)

$ bluetoothctl
Agent registered
[TECKNET BM306]# show
Controller FC:F8:AE:45:3C:05 (public)
        Name: humbaba
        Alias: ChromeLinux_AA14
        Class: 0x000c010c
        Powered: yes
        Discoverable: no
        Pairable: yes
        UUID: Headset AG                (00001112-0000-1000-8000-00805f9b34fb)
        UUID: Generic Attribute Profile (00001801-0000-1000-8000-00805f9b34fb)
        UUID: A/V Remote Control        (0000110e-0000-1000-8000-00805f9b34fb)
        UUID: Generic Access Profile    (00001800-0000-1000-8000-00805f9b34fb)
        UUID: PnP Information           (00001200-0000-1000-8000-00805f9b34fb)
        UUID: A/V Remote Control Target (0000110c-0000-1000-8000-00805f9b34fb)
        UUID: Audio Source              (0000110a-0000-1000-8000-00805f9b34fb)
        UUID: Audio Sink                (0000110b-0000-1000-8000-00805f9b34fb)
        UUID: Headset                   (00001108-0000-1000-8000-00805f9b34fb)
        Modalias: usb:v1D6Bp0246d0532
        Discovering: no
[TECKNET BM306]# devices
Device 20:9B:A5:68:AE:67 SoundBuds Flow
Device DC:2C:26:01:24:23 TECKNET BM306
Device 88:71:E5:0E:6B:99 Echo-HPT
Device 00:0B:E4:A0:A2:14 Nokia BH-103
Device A8:96:75:8B:4F:49 Moto G5S Plus
Device 00:02:5B:20:75:3C Trust SPK-02
Device 88:75:98:F2:5C:9E NS9+
Device 00:E0:4C:D5:E0:F5 SoundCore mini
[TECKNET BM306]# info DC:2C:26:01:24:23
Device DC:2C:26:01:24:23 (public)
        Name: TECKNET BM306
        Alias: TECKNET BM306
        Class: 0x00000580
        Icon: input-mouse
        Paired: yes
        Trusted: yes
        Blocked: no
        Connected: yes
        LegacyPairing: no
        UUID: Service Discovery Serve.. (00001000-0000-1000-8000-00805f9b34fb)
        UUID: Human Interface Device... (00001124-0000-1000-8000-00805f9b34fb)
        UUID: PnP Information           (00001200-0000-1000-8000-00805f9b34fb)
        Modalias: usb:v0A5Cp0001d0129


$ rfkill list
2: dell-wifi: Wireless LAN
        Soft blocked: no
        Hard blocked: no
3: dell-bluetooth: Bluetooth
        Soft blocked: no
        Hard blocked: no
4: dell-wwan: Wireless WAN
        Soft blocked: yes
        Hard blocked: no
5: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no
46: nfc0: NFC
        Soft blocked: no
        Hard blocked: no
48: hci0: Bluetooth
        Soft blocked: no
        Hard blocked: no

ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: bluez 5.50-0ubuntu1
ProcVersionSignature: Ubuntu 4.18.0-7.8-generic 4.18.5
Uname: Linux 4.18.0-7-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.10-0ubuntu11
Architecture: amd64
CurrentDesktop: GNOME
Date: Sun Oct  7 12:05:36 2018
InstallationDate: Installed on 2014-02-07 (1702 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
InterestingModules: rfcomm bnep btusb bluetooth
MachineType: Dell Inc. Latitude E7240
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-7-generic 
root=UUID=052bd6e1-db02-4bca-9f9c-d5600c0237e1 ro quiet splash vt.handoff=1
SourcePackage: bluez
UpgradeStatus: Upgraded to cosmic on 2018-09-29 (7 days ago)
dmi.bios.date: 02/01/2018
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A25
dmi.board.asset.tag: humbaba
dmi.board.name: 0531FD
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.asset.tag: humbaba
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: 
dmi:bvnDellInc.:bvrA25:bd02/01/2018:svnDellInc.:pnLatitudeE7240:pvr00:rvnDellInc.:rn0531FD:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.name: Latitude E7240
dmi.product.sku: 05CA
dmi.product.version: 00
dmi.sys.vendor: Dell Inc.
hciconfig:
 hci0:  Type: Primary  Bus: USB
        BD Address: FC:F8:AE:45:3C:05  ACL MTU: 1021:5  SCO MTU: 96:5
        UP RUNNING PSCAN 
        RX bytes:126931 acl:8217 sco:0 events:414 errors:0
        TX bytes:28384 acl:13 sco:0 commands:170 errors:0

** Affects: bluez (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug cosmic wayland-session

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https://bugs.launchpad.net/bugs/1796553

Title:
  BT mouse getting reset during operation

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