USB device not recognised after re-connect


 
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USB device not recognised after re-connect

Hi all

unixware 7.1.3 I'm afraid ! I connected a usb tape drive and it was automatically recognised in the device list (sdiconfig -l) and created devices in /dev/rmt (ctape1 etc.). I could successfully read and write to the device.

Then unplugged the usb cable and plugged it back in again to the same port. This time the device is still in the device list but the entries in /dev/rmt have gone and these messages appear on the console when the usb cable is connected:

Code:
Jan 29 14:05:12  unix: T.60476-usbd1 000F2   <Drvr16>: Descriptor load failed during enumeration!
Jan 29 14:05:12  unix:
Jan 29 14:05:12  unix: WARNING:
Jan 29 14:05:12  unix: ====== ERROR #1 <Status=OK> .60476-usbd1 000F2   <Drvr16>
Jan 29 14:05:12  unix: Descriptor load failed  during enumeration!
Jan 29 14:05:14  unix: 5:0,7,0: HBA          :  (usb_msto,2) USB     USB HBA
Jan 29 14:05:14  unix:   0,0,0:  TAPE         : HP      C7438A          Z U8B

I've tried re-booting the machine but still no devices. I'm guessing that the problem is related to the "Descriptor load failed during enumeration!" message. Any ideas on how to fix this problem and recreate the /dev/rmt entries ?

Moderator's Comments:
Mod Comment edit by bakunin: please use CODE-tags for code, terminal output and the like, nothing else. Thank you.

Last edited by bakunin; 01-30-2015 at 08:36 PM..
 

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URTW(4) 						   BSD Kernel Interfaces Manual 						   URTW(4)

NAME
urtw -- Realtek RTL8187B/L USB IEEE 802.11b/g wireless network device SYNOPSIS
To compile this driver into the kernel, place the following lines in your kernel configuration file: device ehci device uhci device ohci device usb device urtw device wlan Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5): if_urtw_load="YES" DESCRIPTION
The urtw driver supports USB 802.11b/g wireless adapters based on the Realtek RTL8187B/L. urtw supports station and monitor mode operation. Only one virtual interface may be configured at any time. For more information on config- uring this device, see ifconfig(8). HARDWARE
The urtw driver supports Realtek RTL8187B/L based wireless network devices, including: Card Radio Bus Belkin F5D7050E RTL8225 USB Linksys WUSB54GCv2 RTL8225 USB Netgear WG111v2 RTL8225 USB Netgear WG111v3 RTL8225 USB Safehome WLG-1500SMA5 RTL8225 USB Shuttle XPC Accessory PN20 RTL8225 USB Sitecom WL168v1 RTL8225 USB Sitecom WL168v4 RTL8225 USB SureCom EP-9001-g(2A) RTL8225 USB TRENDnet TEW-424UB V3.xR RTL8225 USB EXAMPLES
Join an existing BSS network (i.e., connect to an access point): ifconfig wlan create wlandev urtw0 inet 192.168.0.20 netmask 0xffffff00 Join a specific BSS network with network name ``my_net'': ifconfig wlan create wlandev urtw0 ssid my_net up Join a specific BSS network with 64-bit WEP encryption: ifconfig wlan create wlandev urtw0 ssid my_net wepmode on wepkey 0x1234567890 weptxkey 1 up SEE ALSO
intro(4), netintro(4), usb(4), wlan(4), wlan_ccmp(4), wlan_tkip(4), wlan_wep(4), ifconfig(8), wpa_supplicant(8) Realtek, http://www.realtek.com.tw. HISTORY
The urtw device driver first appeared in FreeBSD 8.0. AUTHORS
The urtw driver was written by Weongyo Jeong <weongyo@FreeBSD.org>. BSD
October 17, 2009 BSD

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