I installed Ubuntu 15.04 (64 bit) on a DELL XPS 13 (model 9343, bios A03) notebook. I use a DELL bluetooth mouse but sometimes it behaves erratically (laggy, jumpy). What could be causing that? Is there a fiz for that? I am attaching below some info on my system. Thank you. cribari@darwin4:~$ uname -a; lspci -nnk | grep -iA2 net; lsusb; dmesg | grep -i bluetooth; dmesg | grep -i firmware; lsmod | grep bluetooth Linux darwin4 3.19.0-17-generic #17-Ubuntu SMP Wed May 6 16:46:12 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux 02:00.0 Network controller [0280]: Broadcom Corporation BCM4352 802.11ac Wireless Network Adapter [14e4:43b1] (rev 03) Subsystem: Dell Device [1028:0019] Kernel driver in use: wl Bus 003 Device 002: ID 8087:8001 Intel Corp. Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 004: ID 0c45:670c Microdia Bus 001 Device 003: ID 04f3:20d0 Elan Microelectronics Corp. Bus 001 Device 002: ID 0a5c:216f Broadcom Corp. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub [ 2.174367] Bluetooth: Core ver 2.20 [ 2.174669] Bluetooth: HCI device and connection manager initialized [ 2.174792] Bluetooth: HCI socket layer initialized [ 2.174795] Bluetooth: L2CAP socket layer initialized [ 2.175449] Bluetooth: SCO socket layer initialized [ 2.592936] Bluetooth: hci0: BCM: patching hci_ver=06 hci_rev=1624 lmp_ver=06 lmp_subver=220e [ 3.203438] Bluetooth: hci0: BCM: firmware hci_ver=06 hci_rev=1624 lmp_ver=06 lmp_subver=220e [ 3.542418] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 3.542421] Bluetooth: BNEP filters: protocol multicast [ 3.542425] Bluetooth: BNEP socket layer initialized [ 3.551641] Bluetooth: RFCOMM TTY layer initialized [ 3.551649] Bluetooth: RFCOMM socket layer initialized [ 3.551654] Bluetooth: RFCOMM ver 1.11 [ 26.569283] Bluetooth: HIDP (Human Interface Emulation) ver 1.2 [ 26.569287] Bluetooth: HIDP socket layer initialized [ 26.576971] input: Dell Travel Mouse WM524 as /devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3:1.0/bluetooth/hci0/hci0:11/0005:046D:B00E.0003/input/input15 [ 26.577172] hid-generic 0005:046D:B00E.0003: input,hidraw2: BLUETOOTH HID v8.00 Mouse [Dell Travel Mouse WM524] on ac:d1:b8:c0:6f:5c [ 72.448281] input: Dell Travel Mouse WM524 as /devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3:1.0/bluetooth/hci0/hci0:12/0005:046D:B00E.0004/input/input16 [ 72.448526] hid-generic 0005:046D:B00E.0004: input,hidraw2: BLUETOOTH HID v8.00 Mouse [Dell Travel Mouse WM524] on ac:d1:b8:c0:6f:5c [ 2994.842547] input: Dell Travel Mouse WM524 as /devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3:1.0/bluetooth/hci0/hci0:13/0005:046D:B00E.0005/input/input17 [ 2994.842810] hid-generic 0005:046D:B00E.0005: input,hidraw2: BLUETOOTH HID v8.00 Mouse [Dell Travel Mouse WM524] on ac:d1:b8:c0:6f:5c [ 3694.214037] Bluetooth: hci0: BCM: patching hci_ver=06 hci_rev=1000 lmp_ver=06 lmp_subver=220e [ 3694.861578] Bluetooth: hci0: BCM: firmware hci_ver=06 hci_rev=1624 lmp_ver=06 lmp_subver=220e [ 3811.777260] input: Dell Travel Mouse WM524 as /devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3:1.0/bluetooth/hci0/hci0:11/0005:046D:B00E.0006/input/input20 [ 3811.777571] hid-generic 0005:046D:B00E.0006: input,hidraw2: BLUETOOTH HID v8.00 Mouse [Dell Travel Mouse WM524] on ac:d1:b8:c0:6f:5c [ 5579.876192] Modules linked in: huawei_cdc_ncm cdc_wdm cdc_ncm option usb_wwan usbserial usbnet mii uas usb_storage hid_generic hidp nvram msr binfmt_misc rfcomm bnep nls_iso8859_1 intel_rapl iosf_mbi x86_pkg_temp_thermal dell_wmi sparse_keymap intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul dell_laptop dcdbas btusb crc32_pclmul bluetooth ghash_clmulni_intel hid_multitouch aesni_intel aes_x86_64 lrw uvcvideo gf128mul videobuf2_vmalloc glue_helper wl(POE) videobuf2_memops ablk_helper videobuf2_core cryptd v4l2_common videodev media joydev i915_bpo serio_raw i915 dell_led rtsx_pci_ms intel_ips memstick snd_hda_codec_realtek snd_soc_rt286 snd_hda_codec_generic cfg80211 snd_soc_core drm_kms_helper mei_me lpc_ich shpchp mei snd_compress snd_hda_intel snd_hda_controller drm snd_hda_codec i2c_algo_bit [ 5579.876223] Workqueue: hci0 hci_power_on [bluetooth] [ 5579.876261] [] hci_dev_do_open+0xe1/0xa90 [bluetooth] [ 5579.876266] [] hci_power_on+0x40/0x200 [bluetooth] [ 5579.876284] bluetooth hci0: firmware: brcm/BCM20702A0-0a5c-216f.hcd will not be loaded [ 5579.876286] Bluetooth: hci0: BCM: patch brcm/BCM20702A0-0a5c-216f.hcd not found [ 9442.157757] Modules linked in: huawei_cdc_ncm cdc_wdm cdc_ncm option usb_wwan usbserial usbnet mii uas usb_storage hid_generic hidp nvram msr binfmt_misc rfcomm bnep nls_iso8859_1 intel_rapl iosf_mbi x86_pkg_temp_thermal dell_wmi sparse_keymap intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul dell_laptop dcdbas btusb crc32_pclmul bluetooth ghash_clmulni_intel hid_multitouch aesni_intel aes_x86_64 lrw uvcvideo gf128mul videobuf2_vmalloc glue_helper wl(POE) videobuf2_memops ablk_helper videobuf2_core cryptd v4l2_common videodev media joydev i915_bpo serio_raw i915 dell_led rtsx_pci_ms intel_ips memstick snd_hda_codec_realtek snd_soc_rt286 snd_hda_codec_generic cfg80211 snd_soc_core drm_kms_helper mei_me lpc_ich shpchp mei snd_compress snd_hda_intel snd_hda_controller drm snd_hda_codec i2c_algo_bit [ 9442.157787] Workqueue: hci0 hci_power_on [bluetooth] [ 9442.157810] [] hci_dev_do_open+0xe1/0xa90 [bluetooth] [ 9442.157815] [] hci_power_on+0x40/0x200 [bluetooth] [ 9442.157844] bluetooth hci0: firmware: brcm/BCM20702A0-0a5c-216f.hcd will not be loaded [ 9442.157846] Bluetooth: hci0: BCM: patch brcm/BCM20702A0-0a5c-216f.hcd not found [ 9498.411674] input: Dell Travel Mouse WM524 as /devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3:1.0/bluetooth/hci0/hci0:11/0005:046D:B00E.0007/input/input25 [ 9498.411880] hid-generic 0005:046D:B00E.0007: input,hidraw2: BLUETOOTH HID v8.00 Mouse [Dell Travel Mouse WM524] on ac:d1:b8:c0:6f:5c [10589.318323] input: Dell Travel Mouse WM524 as /devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3:1.0/bluetooth/hci0/hci0:11/0005:046D:B00E.0008/input/input26 [10589.318513] hid-generic 0005:046D:B00E.0008: input,hidraw2: BLUETOOTH HID v8.00 Mouse [Dell Travel Mouse WM524] on ac:d1:b8:c0:6f:5c [10777.090455] input: Dell Travel Mouse WM524 as /devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3:1.0/bluetooth/hci0/hci0:11/0005:046D:B00E.0009/input/input27 [10777.090668] hid-generic 0005:046D:B00E.0009: input,hidraw2: BLUETOOTH HID v8.00 Mouse [Dell Travel Mouse WM524] on ac:d1:b8:c0:6f:5c [10813.977023] input: Dell Travel Mouse WM524 as /devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3:1.0/bluetooth/hci0/hci0:11/0005:046D:B00E.000A/input/input28 [10813.977156] hid-generic 0005:046D:B00E.000A: input,hidraw2: BLUETOOTH HID v8.00 Mouse [Dell Travel Mouse WM524] on ac:d1:b8:c0:6f:5c [10945.835463] Bluetooth: hci0: BCM: patching hci_ver=06 hci_rev=1000 lmp_ver=06 lmp_subver=220e [10946.457962] Bluetooth: hci0: BCM: firmware hci_ver=06 hci_rev=1624 lmp_ver=06 lmp_subver=220e [ 3.203438] Bluetooth: hci0: BCM: firmware hci_ver=06 hci_rev=1624 lmp_ver=06 lmp_subver=220e [ 3694.861578] Bluetooth: hci0: BCM: firmware hci_ver=06 hci_rev=1624 lmp_ver=06 lmp_subver=220e [ 5579.876160] WARNING: CPU: 2 PID: 6270 at /build/buildd/linux-3.19.0/drivers/base/firmware_class.c:1126 _request_firmware+0x72e/0xbd0() [ 5579.876238] [] ? _request_firmware+0x5a/0xbd0 [ 5579.876241] [] _request_firmware+0x72e/0xbd0 [ 5579.876243] [] request_firmware+0x35/0x50 [ 5579.876284] bluetooth hci0: firmware: brcm/BCM20702A0-0a5c-216f.hcd will not be loaded [ 9442.157726] WARNING: CPU: 3 PID: 9280 at /build/buildd/linux-3.19.0/drivers/base/firmware_class.c:1126 _request_firmware+0x72e/0xbd0() [ 9442.157798] [] ? _request_firmware+0x5a/0xbd0 [ 9442.157800] [] _request_firmware+0x72e/0xbd0 [ 9442.157801] [] request_firmware+0x35/0x50 [ 9442.157844] bluetooth hci0: firmware: brcm/BCM20702A0-0a5c-216f.hcd will not be loaded [10946.457962] Bluetooth: hci0: BCM: firmware hci_ver=06 hci_rev=1624 lmp_ver=06 lmp_subver=220e bluetooth 491520 23 bnep,hidp,btusb,rfcomm cribari@darwin4:~$ cribari@darwin4:~$ sudo service bluetooth status [sudo] password for cribari: ● bluetooth.service - Bluetooth service Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled) Active: active (running) since Ter 2015-05-12 14:21:44 BRT; 2h 48min left Main PID: 683 (bluetoothd) CGroup: /system.slice/bluetooth.service └─683 /usr/sbin/bluetoothd -n Mai 12 11:22:52 darwin4 bluetoothd[683]: Endpoint unregistered: sender=:1.40...e Mai 12 11:22:52 darwin4 bluetoothd[683]: Endpoint unregistered: sender=:1.40...k Mai 12 11:22:52 darwin4 bluetoothd[683]: bluetoothd[683]: Endpoint unregiste...G Mai 12 11:22:52 darwin4 bluetoothd[683]: bluetoothd[683]: Endpoint unregiste...S Mai 12 11:22:52 darwin4 bluetoothd[683]: bluetoothd[683]: Endpoint unregiste...e Mai 12 11:22:52 darwin4 bluetoothd[683]: bluetoothd[683]: Endpoint unregiste...k Mai 12 11:23:18 darwin4 bluetoothd[683]: bluetoothd[683]: Unknown command co...7 Mai 12 11:23:18 darwin4 bluetoothd[683]: Unknown command complete for opcode 37 Mai 12 11:23:23 darwin4 bluetoothd[683]: bluetoothd[683]: Unknown command co...7 Mai 12 11:23:23 darwin4 bluetoothd[683]: Unknown command complete for opcode 37 Hint: Some lines were ellipsized, use -l to show in full. ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: bluez 4.101-0ubuntu25 ProcVersionSignature: Ubuntu 3.19.0-17.17-generic 3.19.6 Uname: Linux 3.19.0-17-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.17.2-0ubuntu1 Architecture: amd64 Date: Tue May 12 20:12:13 2015 ExecutablePath: /usr/sbin/bluetoothd InstallationDate: Installed on 2015-04-23 (19 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422) InterestingModules: rfcomm bnep btusb bluetooth MachineType: Dell Inc. XPS 13 9343 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-17-generic.efi.signed root=UUID=b1bc4e7b-3e8b-45bd-9b9b-cd95b9cbbec1 ro quiet splash i915.i915_enable_rc6=0 vt.handoff=7 SourcePackage: bluez UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 03/25/2015 dmi.bios.vendor: Dell Inc. dmi.bios.version: A03 dmi.board.name: 0310JH dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA03:bd03/25/2015:svnDellInc.:pnXPS139343:pvr01:rvnDellInc.:rn0310JH:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.name: XPS 13 9343 dmi.product.version: 01 dmi.sys.vendor: Dell Inc. hciconfig: hci0: Type: BR/EDR Bus: USB BD Address: AC:D1:B8:C0:6F:5C ACL MTU: 1021:8 SCO MTU: 64:1 UP RUNNING PSCAN RX bytes:1491155 acl:74655 sco:0 events:8833 errors:0 TX bytes:38138 acl:88 sco:0 commands:253 errors:0