[Bluez-users] connection timeout after interrupted software

[Bluez-users] connection timeout after interrupted software

[martin f krafft]

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I use a bluetooth software that establishes connections with my
phone via libbluetooth.so.1. Sometimes this software has to be
killed. When I do this, it leaves the bluetooth stack in a broken
state:

  # hcitool scan
  Scanning ...
  Inquiry failed: Connection timed out

How can I prevent this? What is the best way to rectify the
situation? So far, only reloading the hci_usb kernel module (I use
a dongle) and reconfiguring hci0 works. Since some of my machines
have monolithic kernels, this requires a restart. I'd prefer if
there was a different solution.

Thanks for any advice.

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Re: [Bluez-users] connection timeout after interrupted software

[Marcel Holtmann]

Hi Martin,

> I use a bluetooth software that establishes connections with my
> phone via libbluetooth.so.1. Sometimes this software has to be
> killed. When I do this, it leaves the bluetooth stack in a broken
> state:
> 
>   # hcitool scan
>   Scanning ...
>   Inquiry failed: Connection timed out
> 
> How can I prevent this? What is the best way to rectify the
> situation? So far, only reloading the hci_usb kernel module (I use
> a dongle) and reconfiguring hci0 works. Since some of my machines
> have monolithic kernels, this requires a restart. I'd prefer if
> there was a different solution.

the shouldn't be any problems, but anyway what kernel version is this
and what does hciconfig show after you discover this problem. Are there
any other information in dmesg or the logfiles?

Regards

Marcel




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Re: [Bluez-users] connection timeout after interrupted software

[martin f krafft]

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first of all, sorry for sending an incomplete report. anyway,
i don't think i can provide more information this time...

also sprach Marcel Holtmann <marcel@holtmann.org> [2005.02.08.1736 +0100]:
> the shouldn't be any problems, but anyway what kernel version is this

2.6.10-1-686 (Debian)

> and what does hciconfig show after you discover this problem.

looks good, the same as before

hci0: Type: USB
  BD Address: 08:00:17:1D:32:4D ACL MTU: 339:4  SCO MTU: 60:9
  UP RUNNING PSCAN ISCAN 
  RX bytes:7621 acl:167 sco:0 events:119 errors:0
  TX bytes:2823 acl:118 sco:0 commands:30 errors:0
  Features: 0xff 0x3b 0x05 0x00 0x00 0x00 0x00 0x00
  Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3 
  Link policy: HOLD SNIFF PARK 
  Link mode: SLAVE ACCEPT 
  Name: 'cirrus'
  Class: 0xf20100
  Service Classes: Networking, Object Transfer, Audio, Telephony, Information
  Device Class: Computer, Uncategorized
  HCI Ver: 1.1 (0x1) HCI Rev: 0x180 LMP Ver: 1.1 (0x1) LMP Subver: 0x180
  Manufacturer: RTX Telecom A/S (21)

> Are there any other information in dmesg or the logfiles?

no, nothing there...

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Re: [Bluez-users] connection timeout after interrupted software

[Marcel Holtmann]

Hi Martin,

> first of all, sorry for sending an incomplete report. anyway,
> i don't think i can provide more information this time...
> 
> also sprach Marcel Holtmann <marcel@holtmann.org> [2005.02.08.1736 +0100]:
> > the shouldn't be any problems, but anyway what kernel version is this
> 
> 2.6.10-1-686 (Debian)
> 
> > and what does hciconfig show after you discover this problem.
> 
> looks good, the same as before
> 
> hci0: Type: USB
>   BD Address: 08:00:17:1D:32:4D ACL MTU: 339:4  SCO MTU: 60:9
>   UP RUNNING PSCAN ISCAN 
>   RX bytes:7621 acl:167 sco:0 events:119 errors:0
>   TX bytes:2823 acl:118 sco:0 commands:30 errors:0
>   Features: 0xff 0x3b 0x05 0x00 0x00 0x00 0x00 0x00
>   Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3 
>   Link policy: HOLD SNIFF PARK 
>   Link mode: SLAVE ACCEPT 
>   Name: 'cirrus'
>   Class: 0xf20100
>   Service Classes: Networking, Object Transfer, Audio, Telephony, Information
>   Device Class: Computer, Uncategorized
>   HCI Ver: 1.1 (0x1) HCI Rev: 0x180 LMP Ver: 1.1 (0x1) LMP Subver: 0x180
>   Manufacturer: RTX Telecom A/S (21)
> 
> > Are there any other information in dmesg or the logfiles?
> 
> no, nothing there...

make sure that you activate the rswitch for the link policy. You can
also try to load hci_usb with reset=1 if available.

What kind of dongle is this? Is it already in my list?

Regards

Marcel




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Re: [Bluez-users] connection timeout after interrupted software

[martin f krafft]

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also sprach Marcel Holtmann <marcel@holtmann.org> [2005.02.09.0727 +0100]:
> make sure that you activate the rswitch for the link policy.

Yeah, that fixed it. I guess I will now go and read up on why that
would make a difference.

> You can also try to load hci_usb with reset=1 if available.

Not needed anymore, and I prefer if I don't have to set it
explicitly.

> What kind of dongle is this? Is it already in my list?

Probably not: it's an El Cheapo dongle from around the corner, an
"Abo UB20". lsusb -vvv output attached.

It works just fine...

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