On Thu, Jan 24, 2002 at 11:20:05AM -0600, Tom Cross wrote: > On Wed, 2002-01-23 at 12:09, Tom Cross wrote: > > I have a MT4X56USB which is a 4port USB Modem from Multitech. Actually > > rather cool however I'm having trouble with it. I'm running 2.4.17 and > > it detects the modem correctly, lets me start 'mgetty' on the USB0 > > port. But when I actually try to use it, mgetty causes and OPPS which > > causes a total system lockup. > > > > I will try to get the opps information. I will have to setup a null > > modem cable since it doesn't log it anywhere. :-( > > Ok, apparently I have no idea how to run ksymopps. I ran for a while > until it was killed due to being run out of memory. > > Anyway, it's obvious that mgetty is doing something that the edgeport > driver doesn't expect. All I have to do is try to get mgetty to answer > the phone to HARD lock the machine. Any ideas? I've tried looking > through the mgetty source code a bit to see if I can see anything > obvious, but this will take a while.
First off, this device isn't "officially" supported (i.e. I don't have the device, and it only looks like the driver protocol matches the other io_edgeport devices.) Second, some people have reported problems with mgetty and the io_edgeport driver in the past. I worked on this for a while, added a bunch more tty ioctl support to the driver, but never got things to quite work totally right. But I never had a lock up, just usually mgetty would fail. Try running strace on the mgetty application, and see if you can get a dump of what happens right before the crash. Also, turn on debugging in the io_edgeport driver (load it with "debug=1") and see if the kernel debug log shows anything. And the best thing would be if you could catch a kernel oops, and run it through ksymoops. There were rumors that some of the I/O Networks employees were working on adding more support for some OEM type devices (like yours) to the Linux driver, but I haven't heard back from them in a long time. Hope this helps a bit. thanks, greg k-h _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
