Well, I see the problem also on real hardware, but it's harder to reproduce. In any case, I don't want to install a non-standard kernel there, so it is mixed up with the other problems with the 5.0 kernel.
However, the VM *does* indeed have bluetooth. Virtualbox allows VMs to access any USB device on the host (when enabled). My BT controller is a usb device. For testing I disable BT on the host and later enable the VM to access the BT usb device; it works fine, ie. connects and disconnects as expected (and, yes, even plays music!). All from the VM. However the GUI problem is most apparent in the VM, running 5.2 kernel. I don't think using a VM is relevant, except that hardware timing will be different due to i/o instructions being trapped and re-executed on the host. If timing causes a problem, then it probably points to a race condition or similar bug. Anyway, as I mentioned the same symptom appears less frequently on bare hardware with the 5.0 kernel. I will attached output from journalctl -f for just one "snapback", and for a complete sequence eventually succeeding. Again, tjese were made with the older kernel. ** Attachment added: "newlog_kernel5.0.0-21-generic_onlyfirstsnapback.txt" https://bugs.launchpad.net/ubuntu/+source/bluez/+bug/1838227/+attachment/5279954/+files/newlog_kernel5.0.0-21-generic_onlyfirstsnapback.txt -- 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/1838227 Title: Bluetooth "Connection switch" snaps back by itself until after many tries Status in bluez package in Ubuntu: Invalid Bug description: Attempting to slide the "Connection" switch in the gui to connect a bluetooth device fails initially -- the switch moves but "snaps back" by itself immediately. Clicking on the switch flashes the "busy" indicator momentarily, but the switch does not move. After a while, connecting succeeds. I don't know if the mouse input is not recognized until the "Nth" attempt, or else the connection was in-progress all along but the gui was not tracking that correctly. Please watch the attached video (use vlc). NOTE: This system is running a non-standard kernel 5.2 in order to circumvent other problems (see bug 1838180). Again, see the video; there is something wrong with how the GUI communicates with the kernel. ProblemType: Bug DistroRelease: Ubuntu 19.04 Package: bluez 5.50-0ubuntu2 Uname: Linux 5.2.0-050200-generic x86_64 ApportVersion: 2.20.10-0ubuntu27.1 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Sun Jul 28 22:46:28 2019 InstallationDate: Installed on 2019-02-06 (173 days ago) InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3) InterestingModules: bluetooth Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 002: ID 80ee:0021 VirtualBox USB Tablet Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: innotek GmbH VirtualBox ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.2.0-050200-generic root=UUID=75234048-11af-4901-9f89-2c32581f5dd3 ro quiet splash SourcePackage: bluez UpgradeStatus: Upgraded to disco on 2019-06-27 (31 days ago) dmi.bios.date: 12/01/2006 dmi.bios.vendor: innotek GmbH dmi.bios.version: VirtualBox dmi.board.name: VirtualBox dmi.board.vendor: Oracle Corporation dmi.board.version: 1.2 dmi.chassis.type: 1 dmi.chassis.vendor: Oracle Corporation dmi.modalias: dmi:bvninnotekGmbH:bvrVirtualBox:bd12/01/2006:svninnotekGmbH:pnVirtualBox:pvr1.2:rvnOracleCorporation:rnVirtualBox:rvr1.2:cvnOracleCorporation:ct1:cvr: dmi.product.family: Virtual Machine dmi.product.name: VirtualBox dmi.product.version: 1.2 dmi.sys.vendor: innotek GmbH hciconfig: rfkill: syslog: Jul 28 22:42:11 V-M-Ubuntu-Experimental NetworkManager[828]: <info> [1564378931.7693] Loaded device plugin: NMBluezManager (/usr/lib/x86_64-linux-gnu/NetworkManager/1.16.0/libnm-device-plugin-bluetooth.so) Jul 28 22:42:22 V-M-Ubuntu-Experimental systemd[1]: Condition check resulted in Bluetooth service being skipped. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/bluez/+bug/1838227/+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
