Comment 0 for bug 1759628

STEPS TO REPRODUCE:
1. Connect to Bluetooth audio device
2. Suspend & Resume
3. Reconnect to Bluetooth device.

This regression in bluez 5.48 has already been identified and fixed upstream. Report is here <https://marc.info/?l=linux-bluetooth&m=151616078627045&w=2> and patch is here <https://git.kernel.org/pub/scm/bluetooth/bluez.git/commit/?id=d6e9539e31c6bb5afd39ec6f09c518d232e6345d>.

Syslog reports messages as follows when this issue is happening (I have replaced my device's MAC address with [MAC]):
Mar 28 12:34:29 cue pulseaudio[1859]: [pulseaudio] bluez5-util.c: Information about device /org/bluez/hci0/dev_[MAC] is invalid
Mar 28 12:34:29 cue bluetoothd[984]: Endpoint replied with an error: org.bluez.Error.InvalidArguments
Mar 28 12:34:33 cue pulseaudio[1859]: [pulseaudio] bluez5-util.c: Information about device /org/bluez/hci0/dev_[MAC] is invalid
Mar 28 12:34:33 cue bluetoothd[984]: Endpoint replied with an error: org.bluez.Error.InvalidArguments

Workaround is to run sudo systemctl restart bluetooth after resume.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: bluez 5.48-0ubuntu3
ProcVersionSignature: Ubuntu 4.15.0-12.13-generic 4.15.7
Uname: Linux 4.15.0-12-generic x86_64
ApportVersion: 2.20.9-0ubuntu1
Architecture: amd64
CurrentDesktop: KDE
Date: Wed Mar 28 12:37:11 2018
InstallationDate: Installed on 2018-03-23 (5 days ago)
InstallationMedia: Kubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180306.1)
InterestingModules: rfcomm bnep btusb bluetooth
MachineType: Hewlett-Packard HP ProBook 640 G1
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-12-generic root=/dev/mapper/internal-root ro quiet splash vt.handoff=1
SourcePackage: bluez
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/25/2018
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: L78 Ver. 01.43
dmi.board.name: 2101
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 16.3C
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvrL78Ver.01.43:bd01/25/2018:svnHewlett-Packard:pnHPProBook640G1:pvrA3009DD10303:rvnHewlett-Packard:rn2101:rvrKBCVersion16.3C:cvnHewlett-Packard:ct10:cvr:
dmi.product.family: 103C_5336AN G=N L=BUS B=HP S=PRO
dmi.product.name: HP ProBook 640 G1
dmi.product.version: A3009DD10303
dmi.sys.vendor: Hewlett-Packard
hciconfig:
 hci0: Type: Primary Bus: USB
  BD Address: 80:00:0B:C7:4D:1C ACL MTU: 310:10 SCO MTU: 64:8
  UP RUNNING PSCAN
  RX bytes:5025 acl:32 sco:0 events:202 errors:0
  TX bytes:5785 acl:32 sco:0 commands:103 errors:0