On Thu, Jul 08, 2004 at 07:26:51PM +0200, Olaf Hering wrote: > > f178:~ # lsusb > > Bus 004 Device 001: ID 0000:0000 > > Bus 003 Device 003: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port > > Bus 003 Device 001: ID 0000:0000 > > Bus 002 Device 004: ID 06cd:0104 Keyspan PDA [prerenum] > > Bus 002 Device 001: ID 0000:0000 > > Bus 001 Device 001: ID 0000:0000 > > f178:~ # l /dev/rm /dev/keyspan > > lrwxrwxrwx 1 root root 7 Jul 8 17:21 /dev/keyspan -> ttyUSB0 > > lrwxrwxrwx 1 root root 7 Jul 8 17:21 /dev/rm -> ttyUSB1 > > Here is a dmesg debug output, rm has an agetty connected, screen > connected via keyspan. I dont get any newlines. Have to verify if 2.4 > behaves the same, I believe yes.
When you open the port on a pl2303 device, a number of initialization commands get sent to the device (due to the fact that no one has the spec, and we really don't know what they due.) Those commands most likely initialize the device to some known state, probably erasing any line settings previously set with some other program. So when dd opens up the port, the settings most likely get trashed :( thanks, greg k-h ------------------------------------------------------- This SF.Net email sponsored by Black Hat Briefings & Training. Attend Black Hat Briefings & Training, Las Vegas July 24-29 - digital self defense, top technical experts, no vendor pitches, unmatched networking opportunities. Visit www.blackhat.com _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
