Hello, > On Thu, 26 Aug 2010, Artem Makhutov wrote: > >> Hello, >> >> Alan Stern schrieb: >> >>>> A few minutes later I can not send any AT commands to the modem any >>>> more, neigther I can receive the preriodical updates from the modem. >>>> >>> Maybe the problem is in the hubs. What happens if you attach one or >>> two modems directly to the computer without using any hubs? >>> >> Yes, this is also what I suspected at first. >> >> No, the problem is not in the hub. >> >> The proble also exists when directly connecting the modems to the >> mainboard or to a USB-PCI controller. >> >> I am just installing FreeBSD. Lets see if I can reproduce the same >> problems... >> > Another thing you can try with Linux is to capture a usbmon trace > showing the problem. It will be best if you do this with as few USB > devices as possible, so no hubs and only one or two modems. See the > instructions in Documentation/usb/usbmon.txt. > I have finally managed to get it running on FreeBSD and I was not able to reproduce this problem. Everything was running stable. I have attached some more detailed log files. In the first log file "one" half of the 7-port usb-hub got disconnected shortly after the startup of the pc. In the second log file the problems fully appeared after starting asterisk and start using the devices. I will try to do a usbmon capture tomorrow. I am really wondering why this problem do not appear on FreeBSD?!? Thanks, Artem
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