I've experienced this issue with bluetooth being unavailable after a suspend for a quite long time (Ubuntu 18.04, 18.10). Sometimes after a resume I think I'm even unable to connect to the wifi.
$ uname -a Linux bacon-xps 4.18.0-15-generic #16-Ubuntu SMP Thu Feb 7 10:56:39 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux I have however found a trick that allows me to fix the bluetooth (on my machine) without the need of a reboot. To get bluetooth (and wifi) working again I do the following steps: 1. Resuspend the machine 2. Disconnect AC charger if connected and reconnect it. (Not necessary if running on battery power) 3. Resume 4. If bluetooth still not available repeat steps 1-3. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1744712 Title: Dell XPS 13 9360 bluetooth (Atheros) won't connect after resume Status in linux package in Ubuntu: Fix Released Status in linux source package in Artful: Fix Released Bug description: === SRU Justification === [Impact] Bluetooth (Atheros) won't connect after resume. [Test Case] Suspend/resume XPS 9360. BT controller is not functional now. With the fix, user confirms the issue is fixed. [Regression Potential] Low. Limited to Atheros BT. No regression report so far since Hans' patch got merged upstream. === Original Bug Report === Sometimes after sleep/resume bluetooth won't reconnect to any device. I can see this in dmesg: [13129.890580] Bluetooth: hci0 command 0x0c1a tx timeout I tried: 1. sudo hciconfig hci0 reset Can't init device hci0: Connection timed out (110) 2. tried reloading modules: sudo rmmod btusb sudo rmmod btrtl sudo rmmod hci_uart sudo rmmod btintel sudo rmmod btbcm btqca sudo rmmod rfcomm sleep 1 sudo modprobe btusb btrtl hci_uart btintel btbcm btqca rfcomm no luck. 3. restart bluetoothd - no luck Only reboot helps. Laptop is: Dell XPS 13 9360. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: bluetooth (not installed) ProcVersionSignature: Ubuntu 4.13.0-25.29-generic 4.13.13 Uname: Linux 4.13.0-25-generic x86_64 ApportVersion: 2.20.7-0ubuntu3.7 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Mon Jan 22 12:50:58 2018 EcryptfsInUse: Yes InstallationDate: Installed on 2017-12-18 (35 days ago) InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018) InterestingModules: rfcomm bnep btusb bluetooth MachineType: Dell Inc. XPS 13 9360 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-25-generic.efi.signed root=UUID=e20224ee-6bcd-49a5-b911-a0c129a48da5 ro quiet splash vt.handoff=7 SourcePackage: bluez UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/12/2017 dmi.bios.vendor: Dell Inc. dmi.bios.version: 2.5.0 dmi.board.name: 02PG84 dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr2.5.0:bd12/12/2017:svnDellInc.:pnXPS139360:pvr:rvnDellInc.:rn02PG84:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.family: XPS dmi.product.name: XPS 13 9360 dmi.sys.vendor: Dell Inc. hciconfig: hci0: Type: Primary Bus: USB BD Address: 9C:B6:D0:EB:95:A6 ACL MTU: 1024:8 SCO MTU: 50:8 DOWN RX bytes:2301887 acl:127559 sco:0 events:249 errors:0 TX bytes:4327 acl:47 sco:0 commands:81 errors:0 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1744712/+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
