If this report is a duplicate it is because my first attempt resulted in a time-out error.
Ubuntu 18.04, with latest updates.
On 20th December I did my weekly disk image as part of my back-up (BU) routine. At that time BlueTooth (BT) was working correctly.
I completed the BU, rebooted and once I was signed in again the Software Updater showed updates to be installed, which included KERNEL DRIVERS. On completion of the update BT no longer functioned, with an error message like Daemon Bluez not started. (i can't be sure exactly of the text).
I hunted for fixes on-line by removing and re-installing the BT packages, even using a different version of the Bluez package, subscripted :i386. I did realise from the queries on-line that this area of Linux has proved difficult for many over the years, but for me this is the first difficulty I have had.
In summary, Restoring the most recent BU image gave me back BT, but the Software Updater tried repeatedly to install the new kernel drivers, even when the box was unticked. So I have uninstalled Software Updater and will rely upon a manual update periodically until the kernel drivers problem is resolved. It's just that I haven't worked out how to filter out the kernel updates anyway!
That's all I can give you for now, regards, Steve.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-45-generic 4.15.0-45.48
ProcVersionSignature: Ubuntu 4.15.0-45.48-generic 4.15.18
Uname: Linux 4.15.0-45-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.9
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: steve 4022 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Sat Dec 21 04:12:55 2019
HibernationDevice: RESUME=UUID=5eee2769-becc-4d7b-804a-d4c188a257f6
InstallationDate: Installed on 2018-06-13 (555 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
MachineType: TOSHIBA SATELLITE P770
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-45-generic root=UUID=ac16a96e-c63e-4723-bade-267625ad9d80 ro quiet splash reboot=bios vt.handoff=1
RelatedPackageVersions:
linux-restricted-modules-4.15.0-45-generic N/A
linux-backports-modules-4.15.0-45-generic N/A
linux-firmware 1.173.13
SourcePackage: linux
UpgradeStatus: Upgraded to bionic on 2019-01-25 (329 days ago)
dmi.bios.date: 12/14/2011
dmi.bios.vendor: TOSHIBA
dmi.bios.version: 1.80
dmi.board.asset.tag: NULL
dmi.board.name: PHRAA
dmi.board.vendor: TOSHIBA
dmi.board.version: 1.00
dmi.chassis.asset.tag: *
dmi.chassis.type: 10
dmi.chassis.vendor: TOSHIBA
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnTOSHIBA:bvr1.80:bd12/14/2011:svnTOSHIBA:pnSATELLITEP770:pvrPSBY3E-02800HEN:rvnTOSHIBA:rnPHRAA:rvr1.00:cvnTOSHIBA:ct10:cvrN/A:
dmi.product.family: ABCDEFGHIJKLMNOPQRSTUVWXYZ
dmi.product.name: SATELLITE P770
dmi.product.version: PSBY3E-02800HEN
dmi.sys.vendor: TOSHIBA
Any help to filter out the kernel drivers in a manual update via the terminal would be appreciated, having Removed Software Updater.