On Sun, 11 Sep 2005 18:25:35 -0700 (PDT) jatan wrote: > Hello, > > i am a newbie in linux. i am supposed to attach three > webcams to a single machine(logitech pro 4000). linux > successfully detects three webcams but applications > like streamer, webcam dont work with three webcams > attached.only when two usb webcams are attached, these > applications work. > > i read it somewhere that one has to play around with > driver and change allocated usb bandwidth so that > device drivers support three webcams. my question is > how do i change that bandwidth? i have done googling > but not of much help. my webcams are supported without > installing any driver in my fedora 2.6. can anyone > tell me where i can find device driver source code so > that i can play around with bandwidth allocation?
Bandwidth allocation is a kernel config option under the main USB config heading. I would expect (but don't know) that most distros do not enable it. It's mostly useless and not implemented at the correct level. Are you connecting the 3 webcams to only one USB host controller? I can see how that might create a bandwidth problem, but linux-usb's bandwidth allocation probably isn't the problem so much as only one host controller is, so if you are using only one host controller (check 'lspci' output for USB host controllers), you could consider adding another host controller (e.g., a PCI card that costs maybe US$20.00). --- ~Randy ------------------------------------------------------- SF.Net email is Sponsored by the Better Software Conference & EXPO September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
