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https://bugs.launchpad.net/bugs/1870837
Title:
hcitool lescan says 'Set scan parameters failed: Input/output error'
Status in bluez package in Ubuntu:
New
Status in linux package in Ubuntu:
Incomplete
Bug description:
Hi,
after some testing with Ubuntu 20.04 beta I couldn't get hcitool
lescan working. I get the following error:
hcitool lescan
Set scan parameters failed: Input/output error
Bluetooth hardware:
hci0: Type: Primary Bus: USB
BD Address: 04:EA:56:21:xx:xx ACL MTU: 1021:4 SCO MTU: 96:6
UP RUNNING
RX bytes:1605 acl:0 sco:0 events:123 errors:0
TX bytes:5801 acl:0 sco:0 commands:123 errors:0
Features: 0xbf 0xfe 0x0f 0xfe 0xdb 0xff 0x7b 0x87
Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
Link policy: RSWITCH SNIFF
Link mode: SLAVE ACCEPT
Name: 'xx'
Class: 0x200104
Service Classes: Audio
Device Class: Computer, Desktop workstation
HCI Version: 5.1 (0xa) Revision: 0x100
LMP Version: 5.1 (0xa) Subversion: 0x100
Manufacturer: Intel Corp. (2)
It is not hardware related, since I get the same error with a USB
bluetooth dongle:
hcitool -i hci1 lescan
Set scan parameters failed: Input/output error
hcitool scan is working fine on both devices; bluetoothctl is also working
and able to find ble devices.
I would normally prefer bluetoothctl, but I got a software which is based on
hcitool.
dmesg shows this errors:
[ 138.152718] debugfs: File 'le_min_key_size' in directory 'hci0' already
present!
[ 138.152722] debugfs: File 'le_max_key_size' in directory 'hci0' already
present!
Bluez version:
bluez 5.53-0ubuntu2 amd64
System:
Distributor ID: Ubuntu
Description: Ubuntu Focal Fossa (development branch)
Release: 20.04
Codename: focal
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