More info! I checked the logs again and found:
xhci_hcd 0000:3e:00.0: HC died; cleaning up Another one at the same time shows this message: xhci_hcd 0000:3e:00.0: PCI post-resume error -19! -- 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/1886245 Title: BCM20702A bluetooth mouse freezing for 4-9 seconds Status in linux package in Ubuntu: Incomplete Bug description: Boot system, the Bluetooth mouse will stop for about 4-9 seconds, then it will work as normal. I am using a plugable USB Bluetooth adapter for Bluetooth connections. I am using blueman to connect. Mouse used is a Kensington Exper Mouse Wireless Trackball Issue does not occur with bluetooth speakers, or headphones. Computer- Dell Precision 5520. Logs show these errors as below bt_uhid_send: Invalid argument (22) Bluetooth: hci0: advertising data len corrected Description: Ubuntu 20.04 LTS Release: 20.04 blueman: Installed: 2.1.2-1 Candidate: 2.1.2-1 Version table: *** 2.1.2-1 500 500 http://au.archive.ubuntu.com/ubuntu focal/universe amd64 Packages 100 /var/lib/dpkg/status ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: bluetooth (not installed) ProcVersionSignature: Ubuntu 5.4.0-40.44-generic 5.4.44 Uname: Linux 5.4.0-40-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.11-0ubuntu27.3 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Sat Jul 4 13:24:01 2020 InstallationDate: Installed on 2020-06-03 (30 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) InterestingModules: rfcomm bnep btusb bluetooth Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 0c45:6713 Microdia Integrated_Webcam_HD Bus 001 Device 002: ID 0a5c:21e8 Broadcom Corp. BCM20702A0 Bluetooth 4.0 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: Dell Inc. Precision 5520 ProcKernelCmdLine: BOOT_IMAGE=/BOOT/ubuntu_ezfsem@/vmlinuz-5.4.0-40-generic root=ZFS=rpool/ROOT/ubuntu_ezfsem ro quiet splash pcie_aspm=off vt.handoff=1 SourcePackage: bluez UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 05/22/2020 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.19.2 dmi.board.name: 06X96V dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.19.2:bd05/22/2020:svnDellInc.:pnPrecision5520:pvr:rvnDellInc.:rn06X96V:rvrA00:cvnDellInc.:ct10:cvr: dmi.product.family: Precision dmi.product.name: Precision 5520 dmi.product.sku: 07BF dmi.sys.vendor: Dell Inc. hciconfig: hci0: Type: Primary Bus: USB BD Address: 5C:F3:70:7E:32:2F ACL MTU: 1021:8 SCO MTU: 64:1 UP RUNNING PSCAN ISCAN RX bytes:193521 acl:13666 sco:0 events:137 errors:0 TX bytes:5858 acl:61 sco:0 commands:82 errors:0 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1886245/+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