So, my fault: It IS actually a kernel issue. I didn't install linux-
modules-extra-4.15.0-96-generic package when trying out Ubuntu 18.04
stock kernel on Ubuntu 20.04. After installing this package hcitool
lescan works flawlessly...
** Package changed: bluez (Ubuntu) => kernel-package (Ubuntu)
Bluetoothctl and blueman are both using LE Extended commands and are
therefor working I think.
(btw: I would edit my comments if I could ...)
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It seems to me that the "normal" LE commands are broken and only the LE
Extended commands are working?
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Title:
hcitool lescan says 'Set scan
After some time I am back to:
hcitool lescan
Set scan parameters failed: Input/output error
Issuing
hcitool cmd 0x03 0x0003
< HCI Command: ogf 0x03, ocf 0x0003, plen 0
> HCI Event: 0x0e plen 4
02 03 0C 00
helps again, but I still can't find any BLE devices with hcitool lescan.
Nevertheless
Executing "hcitool cmd 0x03 0x0003" made the error with hcitool disappear:
hcitool lescan
LE Scan ...
But hcitool does not seem to work as I can't find any ble devices.
btmon output after executing "hcitool cmd 0x03 0x0003 and hcitool lescan:
> HCI Event: Command Complete (0x0e) plen 4
Installed blueman for testing purpose (wasn't installed before): it is allowed
to perform these commands:
@ RAW Open: blueman-manager (privileged) version 2.22
{0x0004}
20:43:17.578682
@ RAW Close:
After some more investigation I found out that the software I am using
is NOT using hcitool. It really seems to be another problem since the
custom software and the hcitool lescan command are throwing the same
error observed with btmon:
@ RAW Close: hcitool
Hmm, I think comment #21 got it right. hcitool has not been supported
for years. Arguably we shouldn't be shipping it. But nobody is going to
maintain it as far as I can tell.
** Changed in: bluez (Ubuntu)
Status: New => Won't Fix
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I also think it's not a kernel issue since bluetoothctl is working and
able to find Bluetooth low energy devices.
Bluez Ubuntu 18.04 version with latest focal kernel also results in:
hcitool lescan
Set scan parameters failed: Input/output error
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On uname -a
Linux xxx 4.15.0-88-generic #88-Ubuntu SMP Tue Feb 11 20:11:34 UTC 2020 x86_64
x86_64 x86_64 GNU/Linux even with up to date focal bluez version the bluetooth
device isn't recognized:
dmesg | grep Bluetooth = empty output
The backup usb bluetooth dongle also doesn't work with this
https://git.kernel.org/pub/scm/bluetooth/bluez.git/commit/?id=b1eb2c4cd057624312e0412f6c4be000f7fc3617
These legacy tools has been marked deprecated since 2017. You should try
migrating to bluetoothctl instead.
** No longer affects: linux (Ubuntu)
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Not a kernel issue.
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Title:
hcitool lescan says 'Set scan parameters failed: Input/output error'
To manage notifications about this bug go to:
With current Ubuntu 18.04 installed on focal and the current bluez v5.48
(current Ubuntu 18.04 version):
I get the following error:
root@xxx:~# uname -a
Linux xxx 4.15.0-88-generic #88-Ubuntu SMP Tue Feb 11 20:11:34 UTC 2020 x86_64
x86_64 x86_64 GNU/Linux
root@xxx:~# hcitool lescan
Could not
I tested the following mainline kernels:
Linux xxx 5.3.18-050318-generic #201912181133 SMP Wed Dec 18 16:36:09 UTC 2019
x86_64 x86_64 x86_64 GNU/Linux
root@xxx:~# hcitool lescan
Set scan parameters failed: Input/output error
root@xxx:~# uname -a
Linux xxx 4.15.18-041518-generic #201804190330
** Attachment added: "CurrentDmesg.txt"
https://bugs.launchpad.net/ubuntu/+source/bluez/+bug/1870837/+attachment/5347865/+files/CurrentDmesg.txt
** Attachment removed: "CurrentDmesg.txt"
** Attachment added: "syslog.txt"
https://bugs.launchpad.net/ubuntu/+source/bluez/+bug/1870837/+attachment/5347863/+files/syslog.txt
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Title:
apport information
** Tags added: apport-collected
** Description changed:
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:
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