[Bluez-users] USB - Stable connection

[Bluez-users] USB - Stable connection

[P. Elias]

Hi,

I'm not sure if this is a bluez related issue but it might help some people 
who have l2cap connection problems.

I'm running kernel 2.4.22 on both machines (1 desktop, 1 laptop) without any 
patch installed. USB and Bluetooth support compiled as modules.

I had troubles getting a stable l2cap link between them. The connection was 
breaking after some packet transmission, even by surfing the web. The cause 
of the problem was the UHCI module (laptop side) which was crashing 
unexpectedly after removing it with the bluetooth dongle plugged. I tried to 
load the USB-UHCI instead and the link works fine now. I tested it overnight 
downloading 1.5 GB at 75Kbps stable speed without any interrupt.

Have a look at my loaded modules:

usb-uhci             23500   0  (unused)
hci_usb              8088     1
usbcore              62624   1  [usb-uhci hci_usb]
bnep                  10324   1
crc32                  2880    0  [bnep]
l2cap                 16876   2  [bnep]
bluez                 32196   1  [hci_usb bnep l2cap]

I hope this will help you guys..
Greetings




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Re: [Bluez-users] USB - Stable connection

[Michal Semler]

If you have Intel or VIA chipset, you should everytime used UHCI modules

Michal

On Thursday 27 of May 2004 20:27, P. Elias wrote:
> Hi,
>
> I'm not sure if this is a bluez related issue but it might help some people
> who have l2cap connection problems.
>
> I'm running kernel 2.4.22 on both machines (1 desktop, 1 laptop) without
> any patch installed. USB and Bluetooth support compiled as modules.
>
> I had troubles getting a stable l2cap link between them. The connection was
> breaking after some packet transmission, even by surfing the web. The cause
> of the problem was the UHCI module (laptop side) which was crashing
> unexpectedly after removing it with the bluetooth dongle plugged. I tried
> to load the USB-UHCI instead and the link works fine now. I tested it
> overnight downloading 1.5 GB at 75Kbps stable speed without any interrupt.
>
> Have a look at my loaded modules:
>
> usb-uhci             23500   0  (unused)
> hci_usb              8088     1
> usbcore              62624   1  [usb-uhci hci_usb]
> bnep                  10324   1
> crc32                  2880    0  [bnep]
> l2cap                 16876   2  [bnep]
> bluez                 32196   1  [hci_usb bnep l2cap]
>
> I hope this will help you guys..
> Greetings
>
>
>
>
> -------------------------------------------------------
> This SF.Net email is sponsored by: Oracle 10g
> Get certified on the hottest thing ever to hit the market... Oracle 10g.
> Take an Oracle 10g class now, and we'll give you the exam FREE.
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> Bluez-users@lists.sourceforge.net
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Re: [Bluez-users] USB - Stable connection

[Marcel Holtmann]

Hi,

> I'm not sure if this is a bluez related issue but it might help some people 
> who have l2cap connection problems.
> 
> I'm running kernel 2.4.22 on both machines (1 desktop, 1 laptop) without any 
> patch installed. USB and Bluetooth support compiled as modules.
> 
> I had troubles getting a stable l2cap link between them. The connection was 
> breaking after some packet transmission, even by surfing the web. The cause 
> of the problem was the UHCI module (laptop side) which was crashing 
> unexpectedly after removing it with the bluetooth dongle plugged. I tried to 
> load the USB-UHCI instead and the link works fine now. I tested it overnight 
> downloading 1.5 GB at 75Kbps stable speed without any interrupt.
> 
> Have a look at my loaded modules:
> 
> usb-uhci             23500   0  (unused)
> hci_usb              8088     1
> usbcore              62624   1  [usb-uhci hci_usb]
> bnep                  10324   1
> crc32                  2880    0  [bnep]
> l2cap                 16876   2  [bnep]
> bluez                 32196   1  [hci_usb bnep l2cap]
> 
> I hope this will help you guys..

thanks for the information, but this is an USB problem and not Bluetooth
related.

Regards

Marcel




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