problem using two bluetooth dongles together

Thread: problem using two bluetooth dongles together

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problem using two bluetooth dongles together
	2007-04-16 08:08:33

hi,   I am using bluez on arm single board computer and i am facing this strange problem. When i am using only one bluetooth dongle , hciconfig correctly reports the bluetooth address of the dongle but when i insert a second dongle then the second dongles bt address is reported as 00:00:00:00:00:00 . Both the dongles individually work fine. Can anyone tell me what can be the cause for such a problem ???? regards siddhant
Re: problem using two bluetooth dongles together
Germany	2007-04-16 08:45:30
Hi, > I am using bluez on arm single board computer and i am facing this > strange problem. > > When i am using only one bluetooth dongle , hciconfig correctly > reports the bluetooth address of the dongle but when i insert a second > dongle then the second dongles bt address is reported as > 00:00:00:00:00:00 . > > Both the dongles individually work fine. > > Can anyone tell me what can be the cause for such a problem ???? never tried it on ARM machines. Check the output of dmesg. Maybe your USB stack has a problem on ARM. Do you run the latest 2.6 kernel? Regards Marcel ------------------------------------------------------------ ------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourcefor ge.net/powerbar/db2/ _______________________________________________ Bluez-users mailing list Bluez-userslists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-users

Re: problem using two bluetooth dongles together
	2007-04-16 09:41:15

hi Marcel,     ;         I am using using kernel 2.4.26.       ;       cant find anything with dmesg output.   ;         ; When trying to run hcid at the prompt i am getting message       ;         ;         ; Can't init device hci1 : Connection time out.         ;       What can be the possible reasons for this ??? regards siddhant         ;     On 4/16/07, Marcel Holtmann < marcelholtmann.org">marcelholtmann.org> wrote: Hi, >;     I am using bluez on arm single board computer and i am facing this > strange problem. > > When i am using only one bluetooth dongle , hciconfig correctly > reports the bluetooth address of the dongle but when i insert a second > dongle then the second dongles bt address is reported as > 00:00:00:00:00:00 . > >; Both the dongles individually work fine. > > Can anyone tell me what can be the cause for such a problem ???? never tried it on ARM machines. Check the output of dmesg. Maybe your USB stack has a problem on ARM. Do you run the latest 2.6 kernel? Regards Marcel ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Bluez-users mailing list Bluez-userslists.sourceforge.net">Bluez-userslists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-users
Re: problem using two bluetooth dongles together
Germany	2007-04-16 10:36:26
Hi Siddhant, > I am using using kernel 2.4.26. > cant find anything with dmesg output. > > When trying to run hcid at the prompt i am getting > message > > Can't init device hci1 : Connection time out. > > What can be the possible reasons for this ??? the USB stack in 2.4.26 is very old. So is the Bluetooth stack. You should really start using a 2.6 kernel. My guess is that you have problems with the USB support in this ancient kernel. Regards Marcel ------------------------------------------------------------ ------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourcefor ge.net/powerbar/db2/ _______________________________________________ Bluez-users mailing list Bluez-userslists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-users

Re: problem using two bluetooth dongles together
	2007-04-16 11:04:15

hi Marcel,   I will try to upgrade to 2.6 kernel but since this is arm Single Board Computer , i am not sure about the effort and time that would be required to do so. I have another observation to share with you . When using two dongle , if i put hci0 down by hciconfig hci0 down and then put hci1 up by hciconfig  hci1 up then hciconfig returns correct address for the second adapter as well. Also if i try to put hci1 up without putting hci0 down then same thing  ----- "cannot contact hci1 connection timed out" message appears. Please reply if you can give me some hints about whats happening after going through the above observation. regards siddhant On 4/16/07, Marcel Holtmann < marcelholtmann.org">marcelholtmann.org> wrote: Hi Siddhant, > ;         ;    I am using using kernel 2.4.26. >       ;         cant find anything with dmesg output. > >        ;        When trying to run hcid at the prompt i am getting > message > >        ;         Can't init device hci1 : Connection time out. > >   ;         ;  What can be the possible reasons for this ??? the USB stack in 2.4.26 is very old. So is the Bluetooth stack. You should really start using a 2.6 kernel. My guess is that you have problems with the USB support in this ancient kernel. Regards Marcel ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Bluez-users mailing list Bluez-userslists.sourceforge.net">Bluez-userslists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-users
Re: problem using two bluetooth dongles together
Germany	2007-04-16 12:28:51
Hi Siddhant, > I will try to upgrade to 2.6 kernel but since this is arm Single > Board Computer , i am not sure about the effort and time that would > be required to do so. > > I have another observation to share with you . > > When using two dongle , if i put hci0 down by hciconfig hci0 down > and then put hci1 up by hciconfig hci1 up > then hciconfig returns correct address for the second adapter as well. > > Also if i try to put hci1 up without putting hci0 down then same > thing > ----- "cannot contact hci1 connection timed out" message appears. > > Please reply if you can give me some hints about whats happening after > going through the above observation. I am pretty sure that is the USB subsystem. Since when you down the adapter all URBs will be canceled. So you can try to change the constants for the number of URBs in hci_usb.h and recompile your kernel. You can also try to disable ISOC transfers (SCO support for the driver) and see if that takes the bandwidth pressure from the USB bus. However, the 2.6 USB subsystem is really the way to go. No effort on porting to 2.6 is wasted. Regards Marcel ------------------------------------------------------------ ------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourcefor ge.net/powerbar/db2/ _______________________________________________ Bluez-users mailing list Bluez-userslists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-users

Re: problem using two bluetooth dongles together
	2007-04-16 23:56:27

hi Marcel,     ;         Thanks for the advice , will surely port to 2.6 kernel. regards siddhant On 4/16/07, Marcel Holtmann < marcelholtmann.org"> marcelholtmann.org> wrote: Hi Siddhant, > ; I will try to upgrade to 2.6 kernel but since this is arm Single >; Board Computer , i am not sure about the effort and time that would > be required to do so. > > I have another observation to share with you . > > When using two dongle , if i put hci0 down by hciconfig hci0 down > and then put hci1 up by hciconfig  hci1 up > then hciconfig returns correct address for the second adapter as well. > > Also if i try to put hci1 up  without putting hci0 down then same >; thing > ;----- "cannot contact hci1 connection timed out" message appears. > > Please reply if you can give me some hints about whats happening after > going through the above observation. I am pretty sure that is the USB subsystem. Since when you down the adapter all URBs will be canceled. So you can try to change the constants for the number of URBs in hci_usb.h and recompile your kernel. You can also try to disable ISOC transfers (SCO support for the driver) and see if that takes the bandwidth pressure from the USB bus. However, the 2.6 USB subsystem is really the way to go. No effort on porting to 2.6 is wasted. Regards Marcel ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Bluez-users mailing list Bluez-userslists.sourceforge.net">Bluez-userslists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-users

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