Public bug reported:
OS: Ubuntu 20.04
Kernel: 5.4.0-31-generic
When using the UI to connect and transfer the file form one machine to
another machine, BASIC mode is getting selected in the L2CAP
configuration and continuous scan is not going on in both sides. the
L2CAP MTU size is also in 672, which is very small. Even with the patch
applied by Intel, it does not increase the TPT because the UI always
selects BASIC mode.
Sample File transfer duration:
sending - (8MB) 5min 18s
sending - (12MB) 7min36s
receiving - (8MB) 4min 8s
receiving - (12MB) 5min 48s
**This issue was also observed in Ubuntu 18.04 OS
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: bluetooth (not installed)
ProcVersionSignature: Ubuntu 5.4.0-31.35-generic 5.4.34
Uname: Linux 5.4.0-31-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Tue May 19 14:46:11 2020
InstallationDate: Installed on 2020-05-19 (0 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
InterestingModules: rfcomm bnep btusb bluetooth
MachineType: LENOVO 20U9SITR39
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-31-generic
root=UUID=6716936f-20b8-4840-8a75-00f4279d9062 ro quiet splash vt.handoff=7
SourcePackage: bluez
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/12/2020
dmi.bios.vendor: LENOVO
dmi.bios.version: N2WET11C (1.01C )
dmi.board.asset.tag: Not Available
dmi.board.name: 20U9SITR39
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias:
dmi:bvnLENOVO:bvrN2WET11C(1.01C):bd02/12/2020:svnLENOVO:pn20U9SITR39:pvrThinkPadX1CarbonGen8:rvnLENOVO:rn20U9SITR39:rvrNotDefined:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad X1 Carbon Gen 8
dmi.product.name: 20U9SITR39
dmi.product.sku: LENOVO_MT_20U9_BU_Think_FM_ThinkPad X1 Carbon Gen 8
dmi.product.version: ThinkPad X1 Carbon Gen 8
dmi.sys.vendor: LENOVO
hciconfig:
hci0: Type: Primary Bus: USB
BD Address: D8:3B:BF:7A:E4:22 ACL MTU: 1021:4 SCO MTU: 96:6
UP RUNNING
RX bytes:22494299 acl:63654 sco:0 events:77112 errors:0
TX bytes:45158198 acl:65574 sco:0 commands:7661 errors:0
** Affects: bluez (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug focal
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https://bugs.launchpad.net/bugs/1879438
Title:
bluetooth file transfer via bluetooth UI is too slow
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