Please try installing an older kernel like that which was in Ubuntu 18.04: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.15/
Reboot, and as soon as you see the purple screen hit Esc. Then select the older kernel you have installed. If that fixes the problem then please repeat and try to find the kernel version where it stopped working: http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=A If that didn't work then please repeat with an even older kernel than 4.15. ** Changed in: bluez (Ubuntu) Status: New => Incomplete ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to bluez in Ubuntu. https://bugs.launchpad.net/bugs/1799064 Title: Bluetooth refuses to power on after cosmic upgrade Status in bluez package in Ubuntu: Incomplete Status in linux package in Ubuntu: Incomplete Bug description: After upgrading from bionic to cosmic, Bluetooth has stopped working. It has worked fine for several versions before. Error message from syslog is: Failed to set mode: Failed (0x03) Which according to various random forum posts seems to suggest the device is not powering on. Powering on manually also does not work: % bluetoothctl Agent registered [bluetooth]# power on Failed to set power on: org.bluez.Error.Failed And results in the same set mode failure getting logged again in syslog. hciconfig reports the device as down: % sudo hciconfig hci0: Type: Primary Bus: USB BD Address: 00:11:67:00:00:00 ACL MTU: 1021:4 SCO MTU: 48:10 DOWN RX bytes:498 acl:0 sco:0 events:21 errors:0 TX bytes:101 acl:0 sco:0 commands:24 errors:0 And, again, it refuses to power on: % sudo hciconfig hci0 up Can't init device hci0: Connection timed out (110) rfkill does not appear to be blocking it: % rfkill list 0: hci0: Bluetooth Soft blocked: no Hard blocked: no 1: phy0: Wireless LAN Soft blocked: no Hard blocked: no And systemd-rfkill.service is masked: ~ % sudo systemctl status systemd-rfkill.service ● systemd-rfkill.service Loaded: masked (Reason: Unit systemd-rfkill.service is masked.) [..] The system does not have tlp installed. I have tried numerous reboots, power offs, and moving the USB Bluetooth adapter to different ports, with no change in result. I have also tried unloading and loading btusb. The adapter is a cheap noname thing off of eBay, I trust the system report will provide every possibly interesting detail about it. ProblemType: Bug DistroRelease: Ubuntu 18.10 Package: bluez 5.50-0ubuntu1 ProcVersionSignature: Ubuntu 4.18.0-10.11-generic 4.18.12 Uname: Linux 4.18.0-10-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.20.10-0ubuntu13 Architecture: amd64 Date: Sun Oct 21 17:22:28 2018 InterestingModules: rfcomm bnep btusb bluetooth MachineType: ASUSTeK Computer INC. EB1501P ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-10-generic root=UUID=515746f5-9b4c-4148-8e1e-012df202f447 ro splash quiet username=autostart,nodiskmount loglevel=0 vt.handoff=1 SourcePackage: bluez UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/02/2012 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 0501 dmi.board.asset.tag: To Be Filled By O.E.M. dmi.board.name: EB1501P dmi.board.vendor: ASUSTeK Computer INC. dmi.board.version: Rev 1.xx dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0501:bd01/02/2012:svnASUSTeKComputerINC.:pnEB1501P:pvrSystemVersion:rvnASUSTeKComputerINC.:rnEB1501P:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.family: Eee Family dmi.product.name: EB1501P dmi.product.sku: To Be Filled By O.E.M. dmi.product.version: System Version dmi.sys.vendor: ASUSTeK Computer INC. hciconfig: hci0: Type: Primary Bus: USB BD Address: 00:11:67:00:00:00 ACL MTU: 1021:4 SCO MTU: 48:10 DOWN RX bytes:498 acl:0 sco:0 events:21 errors:0 TX bytes:95 acl:0 sco:0 commands:22 errors:0 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/bluez/+bug/1799064/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
