>> I am communicating with an isochronous device in Linux, and the timing >> of the USB packets seems to be off. A look at dmesg revealed the >> following message which repeatedly appears during communication which is >> located in line 1403 of usb-uhci.c of my kernel source. >> >> "iso_find_start: gap in seamless isochronous scheduling" >> > This is definately a software problem, most likely in the driver. > > What driver/device do you get this message with? > > JE >
I moved this conversation over to the developer list, since I think it is more apropos. We have our own custom driver that has been around for about 3 years. In the beginning of the development we had gotten this error, but after a complete rewrite over a year ago, we never got the error anymore. Our driver has been tested with many different computers and the only computer that doesn't work is this one specific Dell computer. Furthermore, the RedHat 8.0 (2.4.18-14) kernel with this computer does not give us any problem, but vanilla 2.4.18/2.4.19 kernels as well as our modified kernel which is a (2.4.19 with O(1), preemptive, and low-latency) all give us this error. All the other computers we use run this modified kernel, and we have never experienced this problem since the rewrite. I don't expect people to go through the whole source of our driver and find the problem, I'm just asking for more information about this error: what does it mean exactly, and in what ways can it be caused. Thanks, Dan Parks ------------------------------------------------------- This SF.NET email is sponsored by: FREE SSL Guide from Thawte are you planning your Web Server Security? Click here to get a FREE Thawte SSL guide and find the answers to all your SSL security issues. http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0026en _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
