Arch Linux

Comment 0 for bug 492034

I recently purchased a 802.11n wireless USB device. Specifically, its the Trendnet TEW 649UB [1]. I believe it uses the Realtek RTL8192SU chip.

I'm running Ubuntu 9.10 64bit. The current kernel is Linux 2.6.31-15. When I plug-in the device, it doesn't work. dmesg shows the following logs:

-------------------------------------------------------------------------------------------------------------------------
[ 1754.202557] usb 2-2: new high speed USB device using ehci_hcd and address 4
[ 1754.363248] usb 2-2: configuration #1 chosen from 1 choice
[ 1754.410823] ieee80211_crypt: module is from the staging directory, the quality is unknown, you have been warned.
[ 1754.412641] ieee80211_crypt: registered algorithm 'NULL'
[ 1754.413614] ieee80211_crypt_wep: module is from the staging directory, the quality is unknown, you have been warned.
[ 1754.415422] ieee80211_crypt: registered algorithm 'WEP'
[ 1754.417503] ieee80211_crypt_tkip: module is from the staging directory, the quality is unknown, you have been warned.
[ 1754.419532] ieee80211_crypt: registered algorithm 'TKIP'
[ 1754.420283] ieee80211_crypt_ccmp: module is from the staging directory, the quality is unknown, you have been warned.
[ 1754.421989] ieee80211_crypt: registered algorithm 'CCMP'
[ 1754.430447] ieee80211_rsl: module is from the staging directory, the quality is unknown, you have been warned.
[ 1754.467809] r8192s_usb: module is from the staging directory, the quality is unknown, you have been warned.
[ 1754.476462]
[ 1754.476464] Linux kernel driver for RTL8192 based WLAN cards
[ 1754.476467] Copyright (c) 2007-2008, Realsil Wlan
[ 1754.478361] ==>ep_num:4, in_ep_num:1, out_ep_num:3
[ 1754.478365] ==>RtInPipes:3
[ 1754.478369] ==>RtOutPipes:4 6 13
[ 1754.478374] ==>txqueue_to_outpipemap for BK, BE, VI, VO, HCCA, TXCMD, MGNT, HIGH, BEACON:
[ 1754.478378] 1 1 0 0 2 2 2 2 2
[ 1754.787198] Dot11d_Init()
[ 1754.789574] usbcore: registered new interface driver rtl819xU
[ 1754.857532] rtl819xU: --->FirmwareDownload92S()
[ 1754.857538]
[ 1754.857549] usb 2-2: firmware: requesting RTL8192SU/rtl8192sfw.bin
[ 1754.865843] rtl819xU:request firmware fail!
[ 1754.865847]
[ 1754.866505] rtl819xU:Firmware Download Fail!!a
[ 1754.866508]
[ 1754.887043] rtl819xU: --->FirmwareDownload92S()
[ 1754.887049]
[ 1754.887060] usb 2-2: firmware: requesting RTL8192SU/rtl8192sfw.bin
[ 1754.893971] rtl819xU:request firmware fail!
[ 1754.893974]
[ 1754.894620] rtl819xU:Firmware Download Fail!!a
[ 1754.894623]
[ 1754.894628] rtl819xU:ERR!!! _rtl8192_up(): initialization is failed!
-------------------------------------------------------------------------------------------------------------------------

The log is truncated. The last error keeps looping for a few times. When I place the firmware in the /lib/firmware/RTL8192SU directory, and plugin the device, I get a kernel panic.

lsusb gives the following info:

Bus 001 Device 007: ID 0bda:8172 Realtek Semiconductor Corp.

[1] http://www.trendnet.com/products/proddetail.asp?prod=200_TEW-649UB&cat=76&status=view