Remember this from last year? Does anyone have any idea if there is a fix for this yet? Vojtech, If there isn't a fix yet, and the problem is not in the ACM driver, could you help identify the most likely culprit and point me/us to the maintainer of the suspected code? The following excerpts should refresh memories: ==================================== On Fri, Jun 20, 2003 at 02:16:06PM -0400, Larry Irwin wrote: Hi All, I've been using MultiTech 2834ZDX's on /dev/ttyS1 with mgetty for a few years now on kernel versions 2.2.10 through 2.4.18 (Caldera, Debian, and RedHat). They work great... Now that it's hard to get 2 com ports on servers these days, I'm trying to get a USB modem to work. I've set up a USB modem (MultiTech 5634ZBA) on /dev/ttyACM0, made the entries in /etc/uucp/port and /etc/mgetty/mgetty.config and /etc/inittab. I can dial out fine with uucp, cu, and kermit. But, when I dial into the system I can't get ioctl's "opost" to work properly. - It always stays on one line (cr without nl) no matter what I do with stty... I'm not sure if it's a problem with usb or acm. I think it must be with one of the usb components though, since Vojtech Pavlik's email to me indicates that acm does not process any of the data in the stream. Here are some of the things I've tried: Multiple terminal emulator clients and various emulations - same result for all of them. Everything stays on one line unless it overflows 80 chars. Character overflow moves the "one-line display" down a line or more based on the amount of overflow. "stty raw" will result in a barber-pole display (no cr's just nl's). If I turn on opost after stty raw, it returns to one line... even with ocrnl, onlcr, inlcr, icrnl, and onlret all set. I should be getting double or triple spaced screen output, but it's all on one line. Thanks for looking at this. Larry Irwin CCA Medical ========================================================== On Sunday, August 17, 2003 at 2:30pm David Anders wrote: howdy guys, i too have confirmed that the usb-rs232 adapters as well as several usb modems have this same problem that larry and patrick have reported. i'm currently working with 2.4.21 with the last round of patches from GKH. i'm also loading the usb stuff down with massive debugs to see if i can find out whats going on. i'm new to usb-dev, so its gonna take me a little while to get up to speed on the api enough to trace down this issue.
patrick wrote: This confirms the experience I've been having for months trying to get "dumb terminals" (eg. a wyse 60) (note: NOT terminal emulator software) to work over a usb-serial connection to a linux host. If put into "raw" mode via gettydefs, it works fine (ie. all the data flows from the terminal to the host and vice versa and appears on the screen), except that it is stair-stepped (or, to use your term, barber polled). Whereas if put into "SANE" mode the terminal "locks up" in short order... namely right after the user hits enter at the password prompt. After fiddling with every conceivable option in Wyse's setup, I've never gotten it to properly display the "raw" output from the host. I experienced this on 2.4.18 through 2.4.20, but have not tried on 2.4.21 yet. However, I just tried to set up a dial-up modem for plain serial terminal / host login use over a usb-serial converter (ie, host->usb->rs232 modem) on a linux host running 2.4.21 and experienced essentially the same problems. This same behavior displays no matter what type of serial converter I have used: guc232, pl2303, and keyspan. ================================================== Greg - It is a bug somewhere in the USB system. It is not a setting or anything that we are overlooking. ------------------------------------------------------- This SF.Net email is sponsored by the new InstallShield X. >From Windows to Linux, servers to mobile, InstallShield X is the one installation-authoring solution that does it all. Learn more and evaluate today! http://www.installshield.com/Dev2Dev/0504 _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
