On 26/02/14 22:09, dclinton wrote:
TP-Link N900 TL-WDN4200. Using it successfully on Ubuntu 13.10,
lsusb identifies the chipset as
RT3573 Wireless Adapter (Ralink)
and iwconfig assigns it:
ra0 Ralink STA
lsmod reports that the adapter is using the rt5572sta driver.
On the Ubuntu system, where the USB adapter is working, can you get
information about the loaded firmware? For example (sorry, I don't know
Ubuntu, so you might have to adapt the following) on Debian, with my
rather old USB wifi dongle attached, I see
$ grep -i firmware /var/log/syslog
Feb 27 10:16:58 chili kernel: [ 2969.061573] ieee80211 phy1:
rt2x00lib_request_firmware: Info - Loading firmware file 'rt73.bin'
Feb 27 10:16:58 chili kernel: [ 2969.073917] rt73usb 8-3:1.0: firmware:
direct-loading firmware rt73.bin
Feb 27 10:16:58 chili kernel: [ 2969.073929] ieee80211 phy1:
rt2x00lib_request_firmware: Info - Firmware detected - version: 1.7
k
Also, modinfo shows which firmwares it'd load:
# modinfo --field firmware rt73usb
rt73.bin
$ locate rt73.bin
/lib/firmware/rt73.bin
Now, in your non-working system, do you have the matching firmware
files, and do they get loaded?
Have you searched for "linux firmware ralink rt3573"? Have you seen for
example this forum report which looks like Ralink doesn't know all
devices that use their chips, so their driver doesn't load the firmware
reliably? Maybe Ubuntu have updated the driver for the TP-Link device,
whereas Debian has not yet? (I leave the searching to you ;-)
--
Klaus
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