Sounds like this might be a kernel bug, or a hardware problem. I am skeptical of CSR Bluetooth dongles since they seem to be consistently unreliable, at least on Linux.
Please try a newer (or older) kernel version and tell us if that makes any difference: https://kernel.ubuntu.com/~kernel-ppa/mainline/?C=M;O=D Or more simply just try live booting Ubuntu 20.04 from USB and tell us if that has the same bug: http://cdimage.ubuntu.com/daily-live/current/ Ubuntu 20.04 is due for release at the end of this week. ** Also affects: linux (Ubuntu) Importance: Undecided Status: New ** Changed in: bluez (Ubuntu) Status: New => Incomplete ** Changed in: linux (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to bluez in Ubuntu. https://bugs.launchpad.net/bugs/1873718 Title: CSR8510 based BTA-402 Bluetooth device cannot be started Status in bluez package in Ubuntu: Incomplete Status in linux package in Ubuntu: Incomplete Bug description: In the GUI, I can go to the Bluetooth settings and it shows BT to be off. I turn on the little switch at the top but nothing else changes. If I navigate away from this page and then back, the switch is off again. If I try to reset the device on the command line I get: seb@eragon:~$ sudo hciconfig hci0 reset Can't init device hci0: Connection timed out (110) ProblemType: Bug DistroRelease: Ubuntu 19.10 Package: bluez 5.50-0ubuntu5.1 ProcVersionSignature: Ubuntu 5.3.0-46.38-generic 5.3.18 Uname: Linux 5.3.0-46-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu8.8 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Mon Apr 20 14:39:55 2020 EcryptfsInUse: Yes InterestingModules: bnep btusb bluetooth MachineType: Gigabyte Technology Co., Ltd. To be filled by O.E.M. ProcEnviron: PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_NZ.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.3.0-46-generic root=/dev/mapper/vg0-root rw rootflags=errors=remount-ro quiet splash vt.handoff=1 pti=off SourcePackage: bluez UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/23/2012 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: FA dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: 990FXA-UD3 dmi.board.vendor: AMD Corporation dmi.board.version: x.x dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrFA:bd10/23/2012:svnGigabyteTechnologyCo.,Ltd.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnAMDCorporation:rn990FXA-UD3:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.: dmi.product.family: To be filled by O.E.M. dmi.product.name: To be filled by O.E.M. dmi.product.sku: To be filled by O.E.M. dmi.product.version: To be filled by O.E.M. dmi.sys.vendor: Gigabyte Technology Co., Ltd. hciconfig: hci0: Type: Primary Bus: USB BD Address: 00:00:00:00:00:00 ACL MTU: 0:0 SCO MTU: 0:0 DOWN RX bytes:0 acl:0 sco:0 events:0 errors:0 TX bytes:0 acl:0 sco:0 commands:1 errors:1 rfkill: 0: hci0: Bluetooth Soft blocked: no Hard blocked: no To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/bluez/+bug/1873718/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
