* [Bluez-devel] Transmitting and Receiving SCO data @ 2007-11-03 16:03 robert 2007-11-05 19:29 ` Hunyue Yau 0 siblings, 1 reply; 5+ messages in thread From: robert @ 2007-11-03 16:03 UTC (permalink / raw) To: BlueZ development Hello, I am trying to write a program that just sends and receives SCO data, and I am running into some problems during the transmit phase. Whenever I try to stream out SCO data, the bluetooth dongle is disconnected from the system, which sometimes just closes the connection, but other times it crashes the whole machine. (the program doing the transmitting inevitably crashes). Is there something special that is required for sending SCO data? I have looked at all of the test programs and none of them seem to do anything odd. I am limiting the writes to the MTU size on the connection, but I am writing multiple times in a row. (another test program seems to do this) the code is a little convoluted but I can post a link to it if anyone is interested. cheers, robert ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Bluez-devel mailing list Bluez-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-devel ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [Bluez-devel] Transmitting and Receiving SCO data 2007-11-03 16:03 [Bluez-devel] Transmitting and Receiving SCO data robert @ 2007-11-05 19:29 ` Hunyue Yau 2007-11-05 19:43 ` robert 0 siblings, 1 reply; 5+ messages in thread From: Hunyue Yau @ 2007-11-05 19:29 UTC (permalink / raw) To: bluez-devel On Saturday 03 November 2007 09:03, robert wrote: > Hello, > > I am trying to write a program that just sends and receives SCO data, > and I am running into some problems during the transmit phase. > Whenever I try to stream out SCO data, the bluetooth dongle is > disconnected from the system, which sometimes just closes the > connection, but other times it crashes the whole machine. (the > program doing the transmitting inevitably crashes). Hi, This sounds a lot like a problem I debugged recently. Is the bluetooth dongle on USB? Also what platform (x86 or ???)? What brand and chipset (if known) is the dongle? No one has replied or commented on my post but if you look in the archives, I have a set of patches that works around/fixes it for me. It would be good to confirm I am not the only seeing this problem. -- Hunyue > > Is there something special that is required for sending SCO data? I > have looked at all of the test programs and none of them seem to do > anything odd. I am limiting the writes to the MTU size on the > connection, but I am writing multiple times in a row. (another test > program seems to do this) > > the code is a little convoluted but I can post a link to it if anyone > is interested. > > cheers, > robert > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Splunk Inc. > Still grepping through log files to find problems? Stop. > Now Search log events and configuration files using AJAX and a browser. > Download your FREE copy of Splunk now >> http://get.splunk.com/ > _______________________________________________ > Bluez-devel mailing list > Bluez-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bluez-devel > ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Bluez-devel mailing list Bluez-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-devel ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [Bluez-devel] Transmitting and Receiving SCO data 2007-11-05 19:29 ` Hunyue Yau @ 2007-11-05 19:43 ` robert 2007-11-05 22:41 ` Hunyue Yau 0 siblings, 1 reply; 5+ messages in thread From: robert @ 2007-11-05 19:43 UTC (permalink / raw) To: BlueZ development Hi, It is a USB dongle and it is on x86 (in vmware). I tried with the SCO patch (against 2.6.21) and noticed the same behavior. I am using a DBT-120 v4, which I read was a relatively reliable and well supported device. Receiving seems to work without any errors, it is just transmitting that is failing. Does the bluez stack block if it is handed too much data? Anything else i should try? Perhaps I will try using the headset profile, because that transmits data, and will highlight whether it is a problem with my code. nevertheless, being able to cause a crash like this from userspace is somewhat worrisome. --robert On Nov 5, 2007, at 11:29 AM, Hunyue Yau wrote: > On Saturday 03 November 2007 09:03, robert wrote: >> Hello, >> >> I am trying to write a program that just sends and receives SCO data, >> and I am running into some problems during the transmit phase. >> Whenever I try to stream out SCO data, the bluetooth dongle is >> disconnected from the system, which sometimes just closes the >> connection, but other times it crashes the whole machine. (the >> program doing the transmitting inevitably crashes). > > Hi, > > This sounds a lot like a problem I debugged recently. Is the bluetooth > dongle on USB? Also what platform (x86 or ???)? What brand and > chipset (if known) is the dongle? > > No one has replied or commented on my post but if you look in the > archives, I have a set of patches that works around/fixes it for > me. It > would be good to confirm I am not the only seeing this problem. > > -- Hunyue >> >> Is there something special that is required for sending SCO data? I >> have looked at all of the test programs and none of them seem to do >> anything odd. I am limiting the writes to the MTU size on the >> connection, but I am writing multiple times in a row. (another test >> program seems to do this) >> >> the code is a little convoluted but I can post a link to it if anyone >> is interested. >> >> cheers, >> robert >> >> >> --------------------------------------------------------------------- >> ---- >> This SF.net email is sponsored by: Splunk Inc. >> Still grepping through log files to find problems? Stop. >> Now Search log events and configuration files using AJAX and a >> browser. >> Download your FREE copy of Splunk now >> http://get.splunk.com/ >> _______________________________________________ >> Bluez-devel mailing list >> Bluez-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/bluez-devel >> > > ---------------------------------------------------------------------- > --- > This SF.net email is sponsored by: Splunk Inc. > Still grepping through log files to find problems? Stop. > Now Search log events and configuration files using AJAX and a > browser. > Download your FREE copy of Splunk now >> http://get.splunk.com/ > _______________________________________________ > Bluez-devel mailing list > Bluez-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bluez-devel ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Bluez-devel mailing list Bluez-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-devel ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [Bluez-devel] Transmitting and Receiving SCO data 2007-11-05 19:43 ` robert @ 2007-11-05 22:41 ` Hunyue Yau 2007-11-06 1:43 ` robert 0 siblings, 1 reply; 5+ messages in thread From: Hunyue Yau @ 2007-11-05 22:41 UTC (permalink / raw) To: BlueZ development On Monday 05 November 2007 11:43, robert wrote: > Hi, > > It is a USB dongle and it is on x86 (in vmware). I tried with the > SCO patch (against 2.6.21) and noticed the same behavior. I am using > a DBT-120 v4, which I read was a relatively reliable and well > supported device. Receiving seems to work without any errors, it is > just transmitting that is failing. Do you have a crash dump with the backtrace? -- Hunyue > > Does the bluez stack block if it is handed too much data? Anything > else i should try? > > Perhaps I will try using the headset profile, because that transmits > data, and will highlight whether it is a problem with my code. > > nevertheless, being able to cause a crash like this from userspace is > somewhat worrisome. > > --robert > > On Nov 5, 2007, at 11:29 AM, Hunyue Yau wrote: > > > On Saturday 03 November 2007 09:03, robert wrote: > >> Hello, > >> > >> I am trying to write a program that just sends and receives SCO data, > >> and I am running into some problems during the transmit phase. > >> Whenever I try to stream out SCO data, the bluetooth dongle is > >> disconnected from the system, which sometimes just closes the > >> connection, but other times it crashes the whole machine. (the > >> program doing the transmitting inevitably crashes). > > > > Hi, > > > > This sounds a lot like a problem I debugged recently. Is the bluetooth > > dongle on USB? Also what platform (x86 or ???)? What brand and > > chipset (if known) is the dongle? > > > > No one has replied or commented on my post but if you look in the > > archives, I have a set of patches that works around/fixes it for > > me. It > > would be good to confirm I am not the only seeing this problem. > > > > -- Hunyue > >> > >> Is there something special that is required for sending SCO data? I > >> have looked at all of the test programs and none of them seem to do > >> anything odd. I am limiting the writes to the MTU size on the > >> connection, but I am writing multiple times in a row. (another test > >> program seems to do this) > >> > >> the code is a little convoluted but I can post a link to it if anyone > >> is interested. > >> > >> cheers, > >> robert > >> > >> > >> --------------------------------------------------------------------- > >> ---- > >> This SF.net email is sponsored by: Splunk Inc. > >> Still grepping through log files to find problems? Stop. > >> Now Search log events and configuration files using AJAX and a > >> browser. > >> Download your FREE copy of Splunk now >> http://get.splunk.com/ > >> _______________________________________________ > >> Bluez-devel mailing list > >> Bluez-devel@lists.sourceforge.net > >> https://lists.sourceforge.net/lists/listinfo/bluez-devel > >> > > > > ---------------------------------------------------------------------- > > --- > > This SF.net email is sponsored by: Splunk Inc. > > Still grepping through log files to find problems? Stop. > > Now Search log events and configuration files using AJAX and a > > browser. > > Download your FREE copy of Splunk now >> http://get.splunk.com/ > > _______________________________________________ > > Bluez-devel mailing list > > Bluez-devel@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/bluez-devel > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Splunk Inc. > Still grepping through log files to find problems? Stop. > Now Search log events and configuration files using AJAX and a browser. > Download your FREE copy of Splunk now >> http://get.splunk.com/ > _______________________________________________ > Bluez-devel mailing list > Bluez-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bluez-devel > ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Bluez-devel mailing list Bluez-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-devel ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [Bluez-devel] Transmitting and Receiving SCO data 2007-11-05 22:41 ` Hunyue Yau @ 2007-11-06 1:43 ` robert 0 siblings, 0 replies; 5+ messages in thread From: robert @ 2007-11-06 1:43 UTC (permalink / raw) To: BlueZ development, Hunyue Yau I don't, I am going to try out the headset only solution to see how that goes. If I have the same results, then I will do more investigation into the SCO code otherwise, I must be doing something wrong. I will post with more details. --robert On Nov 5, 2007, at 2:41 PM, Hunyue Yau wrote: > On Monday 05 November 2007 11:43, robert wrote: >> Hi, >> >> It is a USB dongle and it is on x86 (in vmware). I tried with the >> SCO patch (against 2.6.21) and noticed the same behavior. I am using >> a DBT-120 v4, which I read was a relatively reliable and well >> supported device. Receiving seems to work without any errors, it is >> just transmitting that is failing. > > Do you have a crash dump with the backtrace? > > -- Hunyue >> >> Does the bluez stack block if it is handed too much data? Anything >> else i should try? >> >> Perhaps I will try using the headset profile, because that transmits >> data, and will highlight whether it is a problem with my code. >> >> nevertheless, being able to cause a crash like this from userspace is >> somewhat worrisome. >> >> --robert >> >> On Nov 5, 2007, at 11:29 AM, Hunyue Yau wrote: >> >>> On Saturday 03 November 2007 09:03, robert wrote: >>>> Hello, >>>> >>>> I am trying to write a program that just sends and receives SCO >>>> data, >>>> and I am running into some problems during the transmit phase. >>>> Whenever I try to stream out SCO data, the bluetooth dongle is >>>> disconnected from the system, which sometimes just closes the >>>> connection, but other times it crashes the whole machine. (the >>>> program doing the transmitting inevitably crashes). >>> >>> Hi, >>> >>> This sounds a lot like a problem I debugged recently. Is the >>> bluetooth >>> dongle on USB? Also what platform (x86 or ???)? What brand and >>> chipset (if known) is the dongle? >>> >>> No one has replied or commented on my post but if you look in the >>> archives, I have a set of patches that works around/fixes it for >>> me. It >>> would be good to confirm I am not the only seeing this problem. >>> >>> -- Hunyue >>>> >>>> Is there something special that is required for sending SCO >>>> data? I >>>> have looked at all of the test programs and none of them seem to do >>>> anything odd. I am limiting the writes to the MTU size on the >>>> connection, but I am writing multiple times in a row. (another >>>> test >>>> program seems to do this) >>>> >>>> the code is a little convoluted but I can post a link to it if >>>> anyone >>>> is interested. >>>> >>>> cheers, >>>> robert >>>> >>>> >>>> ------------------------------------------------------------------- >>>> -- >>>> ---- >>>> This SF.net email is sponsored by: Splunk Inc. >>>> Still grepping through log files to find problems? Stop. >>>> Now Search log events and configuration files using AJAX and a >>>> browser. >>>> Download your FREE copy of Splunk now >> http://get.splunk.com/ >>>> _______________________________________________ >>>> Bluez-devel mailing list >>>> Bluez-devel@lists.sourceforge.net >>>> https://lists.sourceforge.net/lists/listinfo/bluez-devel >>>> >>> >>> -------------------------------------------------------------------- >>> -- >>> --- >>> This SF.net email is sponsored by: Splunk Inc. >>> Still grepping through log files to find problems? Stop. >>> Now Search log events and configuration files using AJAX and a >>> browser. >>> Download your FREE copy of Splunk now >> http://get.splunk.com/ >>> _______________________________________________ >>> Bluez-devel mailing list >>> Bluez-devel@lists.sourceforge.net >>> https://lists.sourceforge.net/lists/listinfo/bluez-devel >> >> >> --------------------------------------------------------------------- >> ---- >> This SF.net email is sponsored by: Splunk Inc. >> Still grepping through log files to find problems? Stop. >> Now Search log events and configuration files using AJAX and a >> browser. >> Download your FREE copy of Splunk now >> http://get.splunk.com/ >> _______________________________________________ >> Bluez-devel mailing list >> Bluez-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/bluez-devel >> > > ---------------------------------------------------------------------- > --- > This SF.net email is sponsored by: Splunk Inc. > Still grepping through log files to find problems? Stop. > Now Search log events and configuration files using AJAX and a > browser. > Download your FREE copy of Splunk now >> http://get.splunk.com/ > _______________________________________________ > Bluez-devel mailing list > Bluez-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bluez-devel ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Bluez-devel mailing list Bluez-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-devel ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2007-11-06 1:43 UTC | newest] Thread overview: 5+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2007-11-03 16:03 [Bluez-devel] Transmitting and Receiving SCO data robert 2007-11-05 19:29 ` Hunyue Yau 2007-11-05 19:43 ` robert 2007-11-05 22:41 ` Hunyue Yau 2007-11-06 1:43 ` robert
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