This seems to be a kernel/firmware issue, but the attached logs do not reveal much information when it occurs. I'll suggest you to:
1. try to capture the log with `apport` after the symptom happens again. If you're not the reporter, file a new bug instead. 2. please try new kernel from Focal or mainline[1], and/or linux- firmware package. [1]: https://kernel.ubuntu.com/~kernel-ppa/mainline/ -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1775443 Title: Ubuntu 18.04 Bluetooth Crash Status in linux package in Ubuntu: Expired Bug description: I am having trouble with the bluetooth connection between the laptop and my Logitech MX Master wireless mouse. The computer will lose connection with the mouse multiple times per day. When this happens, the bluetooth icon in the upper right-hand corner of the screen disappears. Checking the Bluetooth system preference panel, Bluetooth is turned off. I can toggle the switch to "on" but bluetooth remains off. Neither restarting the computer nor power cycling the computer bring bluetooth back. $ sudo service bluetooth restart also doesn't work. The only way I have found to renable bluetooth is: 1. reboot 2. disable bluetooth in BIOS 3. reboot 4. enable bluetooth in BIOS 5. reboot Also, I was running Ubuntu 16.04 until this past Friday. I experienced this problem under 16.04 but it happened much less frequently (once every couple weeks or so). I upgraded to 18.04 ahead of 18.04.1 in hopes that a newer kernel/driver would work better with my brand new hardware. Now, under 18.04, bluetooth is crashing multiple times per day. Here's the output of `grep blue /var/log/syslog`: Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/adapter.c:dev_class_changed_callback() Class: 0x000000 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/adapter.c:new_settings_callback() Settings: 0x00000ada Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/adapter.c:settings_changed() Changed settings: 0x00000001 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/adapter.c:cancel_passive_scanning() Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/adapter.c:adapter_remove_connection() Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/adapter.c:adapter_remove_connection() Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/adapter.c:adapter_stop() adapter /org/bluez/hci0 has been disabled Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/device.c:att_disconnected_cb() Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/device.c:att_disconnected_cb() Software caused connection abort (103) Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/service.c:change_state() 0x565278ad2320: device F9:9B:77:D9:08:61 profile batt-profile state changed: connected -> disconnecting (0) Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/service.c:change_state() 0x565278ad2320: device F9:9B:77:D9:08:61 profile batt-profile state changed: disconnecting -> disconnected (0) Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/service.c:change_state() 0x565278ad2230: device F9:9B:77:D9:08:61 profile deviceinfo state changed: connected -> disconnecting (0) Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/service.c:change_state() 0x565278ad2230: device F9:9B:77:D9:08:61 profile deviceinfo state changed: disconnecting -> disconnected (0) Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/service.c:change_state() 0x565278adce30: device F9:9B:77:D9:08:61 profile gap-profile state changed: connected -> disconnecting (0) Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/service.c:change_state() 0x565278adce30: device F9:9B:77:D9:08:61 profile gap-profile state changed: disconnecting -> disconnected (0) Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/service.c:change_state() 0x565278adc150: device F9:9B:77:D9:08:61 profile input-hog state changed: connected -> disconnecting (0) Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: attrib/gattrib.c:g_attrib_unref() 0x565278add490: g_attrib_unref=1 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/service.c:change_state() 0x565278adc150: device F9:9B:77:D9:08:61 profile input-hog state changed: disconnecting -> disconnected (0) Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/gatt-client.c:btd_gatt_client_disconnected() Device disconnected. Cleaning up. Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: attrib/gattrib.c:g_attrib_unref() 0x565278add490: g_attrib_unref=0 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/adapter.c:index_removed() index 0 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/adapter.c:adapter_unregister() Unregister path: /org/bluez/hci0 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/adapter.c:adapter_remove() Removing adapter /org/bluez/hci0 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/device.c:device_remove() Removing device /org/bluez/hci0/dev_F9_9B_77_D9_08_61 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/service.c:change_state() 0x565278ad2320: device F9:9B:77:D9:08:61 profile batt-profile state changed: disconnected -> unavailable (0) Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: profiles/battery/battery.c:batt_remove() BATT profile remove (F9:9B:77:D9:08:61) Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/service.c:btd_service_unref() 0x565278ad2320: ref=0 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/service.c:change_state() 0x565278ad2230: device F9:9B:77:D9:08:61 profile deviceinfo state changed: disconnected -> unavailable (0) Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/service.c:btd_service_unref() 0x565278ad2230: ref=0 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/service.c:change_state() 0x565278adce30: device F9:9B:77:D9:08:61 profile gap-profile state changed: disconnected -> unavailable (0) Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: profiles/gap/gas.c:gap_remove() GAP profile remove (F9:9B:77:D9:08:61) Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/service.c:btd_service_unref() 0x565278adce30: ref=0 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/service.c:change_state() 0x565278adc150: device F9:9B:77:D9:08:61 profile input-hog state changed: disconnected -> unavailable (0) Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/service.c:btd_service_unref() 0x565278adc150: ref=1 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: profiles/input/hog.c:hog_remove() path /org/bluez/hci0/dev_F9_9B_77_D9_08_61 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/service.c:btd_service_unref() 0x565278adc150: ref=0 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/device.c:btd_device_unref() Freeing device /org/bluez/hci0/dev_F9_9B_77_D9_08_61 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/gatt-client.c:unregister_service() Removing GATT service: /org/bluez/hci0/dev_F9_9B_77_D9_08_61/service0008 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/gatt-client.c:unregister_characteristic() Removing GATT characteristic: /org/bluez/hci0/dev_F9_9B_77_D9_08_61/service0008/char0009 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/gatt-client.c:unregister_descriptor() Removing GATT descriptor: /org/bluez/hci0/dev_F9_9B_77_D9_08_61/service0008/char0009/desc000b Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/gatt-client.c:unregister_service() Removing GATT service: /org/bluez/hci0/dev_F9_9B_77_D9_08_61/service000c Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/gatt-client.c:unregister_characteristic() Removing GATT characteristic: /org/bluez/hci0/dev_F9_9B_77_D9_08_61/service000c/char000d Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/gatt-client.c:unregister_characteristic() Removing GATT characteristic: /org/bluez/hci0/dev_F9_9B_77_D9_08_61/service000c/char000f Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/gatt-client.c:unregister_characteristic() Removing GATT characteristic: /org/bluez/hci0/dev_F9_9B_77_D9_08_61/service000c/char0011 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/gatt-client.c:unregister_characteristic() Removing GATT characteristic: /org/bluez/hci0/dev_F9_9B_77_D9_08_61/service000c/char0013 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/gatt-client.c:unregister_characteristic() Removing GATT characteristic: /org/bluez/hci0/dev_F9_9B_77_D9_08_61/service000c/char0015 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/gatt-client.c:unregister_characteristic() Removing GATT characteristic: /org/bluez/hci0/dev_F9_9B_77_D9_08_61/service000c/char0017 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/gatt-client.c:unregister_characteristic() Removing GATT characteristic: /org/bluez/hci0/dev_F9_9B_77_D9_08_61/service000c/char0019 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/gatt-client.c:unregister_service() Removing GATT service: /org/bluez/hci0/dev_F9_9B_77_D9_08_61/service003f Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/gatt-client.c:unregister_characteristic() Removing GATT characteristic: /org/bluez/hci0/dev_F9_9B_77_D9_08_61/service003f/char0040 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/gatt-client.c:unregister_descriptor() Removing GATT descriptor: /org/bluez/hci0/dev_F9_9B_77_D9_08_61/service003f/char0040/desc0042 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/device.c:device_free() 0x565278adc490 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: plugins/hostname.c:hostname_remove() Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: profiles/audio/a2dp.c:media_server_remove() path /org/bluez/hci0 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: profiles/audio/media.c:release_endpoint() sender=:1.452 path=/MediaEndpoint/A2DPSource Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/adapter.c:adapter_service_remove() /org/bluez/hci0 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/adapter.c:remove_uuid() sending remove uuid command for index 0 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/sdpd-service.c:remove_record_from_server() Removing record with handle 0x10003 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: profiles/audio/media.c:release_endpoint() sender=:1.452 path=/MediaEndpoint/A2DPSource Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: Endpoint unregistered: sender=:1.452 path=/MediaEndpoint/A2DPSource Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: profiles/audio/media.c:media_endpoint_destroy() sender=:1.452 path=/MediaEndpoint/A2DPSource Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: profiles/audio/avdtp.c:avdtp_unregister_sep() SEP 0x565278ade790 unregistered: type:0 codec:0 seid:1 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: profiles/audio/media.c:release_endpoint() sender=:1.452 path=/MediaEndpoint/A2DPSink Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/adapter.c:adapter_service_remove() /org/bluez/hci0 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/adapter.c:remove_uuid() sending remove uuid command for index 0 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/sdpd-service.c:remove_record_from_server() Removing record with handle 0x10004 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: profiles/audio/media.c:release_endpoint() sender=:1.452 path=/MediaEndpoint/A2DPSink Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: Endpoint unregistered: sender=:1.452 path=/MediaEndpoint/A2DPSink Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: profiles/audio/media.c:media_endpoint_destroy() sender=:1.452 path=/MediaEndpoint/A2DPSink Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: profiles/audio/avdtp.c:avdtp_unregister_sep() SEP 0x565278ae1c90 unregistered: type:1 codec:0 seid:2 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/profile.c:ext_adapter_remove() "Headset Voice gateway" removed Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/adapter.c:adapter_service_remove() /org/bluez/hci0 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/adapter.c:remove_uuid() sending remove uuid command for index 0 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/sdpd-service.c:remove_record_from_server() Removing record with handle 0x10005 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: profiles/audio/a2dp.c:a2dp_source_server_remove() path /org/bluez/hci0 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: profiles/audio/a2dp.c:a2dp_sink_server_remove() path /org/bluez/hci0 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: profiles/audio/avrcp.c:avrcp_target_server_remove() path /org/bluez/hci0 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/adapter.c:adapter_service_remove() /org/bluez/hci0 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/adapter.c:remove_uuid() sending remove uuid command for index 0 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/sdpd-service.c:remove_record_from_server() Removing record with handle 0x10002 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: profiles/audio/avrcp.c:avrcp_controller_server_remove() path /org/bluez/hci0 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/adapter.c:adapter_service_remove() /org/bluez/hci0 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/adapter.c:remove_uuid() sending remove uuid command for index 0 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/sdpd-service.c:remove_record_from_server() Removing record with handle 0x10001 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: profiles/network/manager.c:nap_server_remove() path /org/bluez/hci0 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: profiles/network/manager.c:gn_server_remove() path /org/bluez/hci0 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: profiles/network/manager.c:panu_server_remove() path /org/bluez/hci0 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: profiles/network/server.c:path_unregister() Unregistered interface org.bluez.NetworkServer1 on path /org/bluez/hci0 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/adapter.c:btd_adapter_unref() Freeing adapter /org/bluez/hci0 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/adapter.c:adapter_free() 0x565278acdb00 Jun 6 09:12:41 Precision-5520 bluetoothd[3189]: src/rfkill.c:rfkill_event() RFKILL event idx 9 type 2 op 1 soft 0 hard 0 Jun 6 09:12:42 Precision-5520 systemd[1]: bluetooth.target: Unit not needed anymore. Stopping. $ lsb_release -rd Description: Ubuntu 18.04 LTS Release: 18.04 $ apt-cache policy bluez bluez: Installed: 5.48-0ubuntu3 Candidate: 5.48-0ubuntu3 Version table: *** 5.48-0ubuntu3 500 500 http://archive.ubuntu.com/ubuntu bionic/main amd64 Packages 100 /var/lib/dpkg/status $ apt-cache policy blueman blueman: Installed: 2.0.5-1ubuntu1 Candidate: 2.0.5-1ubuntu1 Version table: *** 2.0.5-1ubuntu1 500 500 http://archive.ubuntu.com/ubuntu bionic/universe amd64 Packages 100 /var/lib/dpkg/status ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-image-4.15.0-22-generic 4.15.0-22.24 ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17 Uname: Linux 4.15.0-22-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.9-0ubuntu7.1 Architecture: amd64 CurrentDesktop: GNOME Date: Wed Jun 6 10:48:07 2018 DistributionChannelDescriptor: # This is a distribution channel descriptor # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor canonical-oem-somerville-xenial-amd64-20160624-2 InstallationDate: Installed on 2018-01-12 (145 days ago) InstallationMedia: Ubuntu 16.04 "Xenial" - Build amd64 LIVE Binary 20160624-10:47 ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: linux-signed UpgradeStatus: Upgraded to bionic on 2018-06-01 (4 days ago) --- ApportVersion: 2.20.9-0ubuntu7.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: cspencer 2416 F.... pulseaudio CurrentDesktop: GNOME DistributionChannelDescriptor: # This is a distribution channel descriptor # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor canonical-oem-somerville-xenial-amd64-20160624-2 DistroRelease: Ubuntu 18.04 InstallationDate: Installed on 2018-01-12 (145 days ago) InstallationMedia: Ubuntu 16.04 "Xenial" - Build amd64 LIVE Binary 20160624-10:47 MachineType: Dell Inc. Precision 5520 NonfreeKernelModules: nvidia_modeset nvidia Package: linux-signed ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-22-generic root=UUID=602f267c-ef2b-4892-8b98-8dda563da166 ro acpi_rev_override quiet splash vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17 RelatedPackageVersions: linux-restricted-modules-4.15.0-22-generic N/A linux-backports-modules-4.15.0-22-generic N/A linux-firmware 1.173.1 Tags: bionic Uname: Linux 4.15.0-22-generic x86_64 UpgradeStatus: Upgraded to bionic on 2018-06-01 (4 days ago) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 04/23/2018 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.9.4 dmi.board.name: 06X96V dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.9.4:bd04/23/2018:svnDellInc.:pnPrecision5520:pvr:rvnDellInc.:rn06X96V:rvrA00:cvnDellInc.:ct10:cvr: dmi.product.family: Precision dmi.product.name: Precision 5520 dmi.sys.vendor: Dell Inc. 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