On Fri, Jun 30, 2006 at 06:14:49PM +0100, Paulo Marques wrote: > > Hi, > > I have a setup with a USB2 high-speed hub connected to a USB2 port on a PC. > > On this hub I connect 4 usb to serial adapters (3 pl2303 and 1 ftdi). > These are all full-speed devices.
What kernel version are you using? > If I disable the EHCI controller on the BIOS, then all adapters work > just fine, but the hub runs in full-speed mode (of course). > > However, using the EHCI controller gives a lot of errors running this > simple script: > > >for i in 1 2 3 4; do > > DEVICE=/dev/usb/tts/$i > > stty -F $DEVICE 115200 raw -echo > > cat [some large file] > $DEVICE & > >done 'cat' is not a good thing to do when testing usb-serial devices. Please use a serial transfer program instead. Some of the usb-serial drivers like to re-initialize things to line settings that you don't expect, every time the port is opened, so 'cat' might not work. thanks, greg k-h Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
