> Hi Linux USB Users! > > Sorry for the lengthy email, but I am having trouble getting a USB > modem to work, or even to install correctly, with RedHat Enterprise Linux > > I have the following setup: > > - RedHat ES 4 Update 3 (Kernel version 2.6.9-34smp) > - Zoom 56K Model 2986 USB Modem > > I am attempting to use this modem to dial out. However I cannot seem > to get the OS to apply the right driver (the CDC ACM driver, by all > accounts) to it. > > The file that made me come to this conclusion is //proc/bus/usb/devices/: > > T: Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 3 > B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0 > D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 > P: Vendor=0000 ProdID=0000 Rev= 2.06 > S: Manufacturer=Linux 2.6.9-34.ELsmp ohci_hcd > S: Product=OHCI Host Controller > S: SerialNumber=0000:01:00.1 > C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA > I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub > E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=255ms > > T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 3 > B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0 > D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 > P: Vendor=0000 ProdID=0000 Rev= 2.06 > S: Manufacturer=Linux 2.6.9-34.ELsmp ohci_hcd > S: Product=OHCI Host Controller > S: SerialNumber=0000:01:00.0 > C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA > I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub > E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=255ms > > T: Bus=01 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#= 2 Spd=12 MxCh= 0 > D: Ver= 1.10 Cls=02(comm.) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 > P: Vendor=0572 ProdID=1280 Rev= 1.00 > S: Manufacturer=Conexant Systems, Inc. > S: Product=USB ACF Modem > C:* #Ifs= 2 Cfg#= 1 Atr=a0 MxPwr=260mA > I: If#= 0 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=(none) > E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms > E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms > I: If#= 1 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=02 Prot=01 Driver=(none) > E: Ad=82(I) Atr=03(Int.) MxPS= 64 Ivl=1ms > > My understanding (based on the /devices/ file and > http://www.theory.physics.ubc.ca/usb-acm.txt and acm.txt on my > filesystem) is that (a) this modem supports the ACM driver (unless > there is a world of difference between the 2986 and the 2986L) and (b) > the driver associated with the modem should be listed in the /devices/ > file as Driver=(acm) or Driver=(cdc_acm). As you can see, with me, > it's "none". So I figure that the driver has not been mapped in some > way to this device, or the device has not been mapped to a device > name, such as /dev/usb/ttyACM0. > > My /dmesg/ output contains the following extract (which tells me I > have the driver I need): > > usbcore: registered new driver cdc_acm > drivers/usb/class/cdc-acm.c: v0.23:USB Abstract Control Model driver > for USB modems and ISDN adapters > > The CDC_ACM modules is loaded - the output of /lsmod/ is as follows: > > Module Size Used by > ipt_REJECT 10561 0 > iptable_filter 6721 0 > ip_tables 21441 2 ipt_REJECT,iptable_filter > dlm 113732 3 > cman 122976 8 dlm > md5 8001 1 > ipv6 240225 55 > cdc_acm 16865 0 > dm_mirror 28449 0 > dm_mod 59973 1 dm_mirror > button 10449 0 > battery 12869 0 > ac 8773 0 > ohci_hcd 23889 0 > hw_random 9557 0 > via_rhine 24521 0 > mii 9153 1 via_rhine > tg3 95173 0 > bonding 60520 0 > floppy 58065 0 > ext3 118729 3 > jbd 59481 1 ext3 > qla6312 119168 0 > qla2400 197632 0 > qla2300 128512 0 > qla2xxx 304024 4 qla6312,qla2400,qla2300 > qla2xxx_conf 305924 1 > cciss 57989 4 > sd_mod 20545 2 > scsi_mod 116941 3 qla2xxx,cciss,sd_mod > > I tried creating character devices as follows: > > mknod /dev/usb/ttyACM0 c 166 0 > mknod /dev/usb/ttyACM1 c 166 1 > mknod /dev/usb/ttyACM2 c 166 2 > mknod /dev/usb/ttyACM3 c 166 3 > > I am not sure how much difference this made, so in addition I am > unsure of how to even refer to the device, to obtain info via > /udevinfo/, for example, let alone dialling out :) > > If anyone has any pointers, that would be greatly appreciated. > > Many thanks, > Jon Daniels > > > >
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