[ath9k-devel] Complete freeze when scanning

[ath9k-devel] Complete freeze when scanning

[Bertrand Marc]

Dear ath9k maintainers,

I recently bought a TP-link WN751ND and I can't get it to work on my
linux box (Debian Wheezy, with a 3.2 kernel). I tried with the last
stable version of compat-drivers without success.

Here is what I do: I load the ath9k module and bring up the device but
as soon as I try to scan for networks (iw dev wlan0 scan), the system
completely freezes and I need to hard reboot.

Could you help me to get this device working ? I can provide any
information you need and try any version of compat-drivers. The computer
is very old, so I won't be able to compile a whole kernel unfortunately.

You'll find attached the output of lspci -vvvxxxx and a syslog dump just
before the freeze (with debug=0xffffffff option passed to ath9k). I
tried with netconsole, but nothing about ath9k came up. I also tried to
stop network-manager, it doesn't help as NM doesn't managed the card
anyway so you can safely ignore NM messages in syslog.

I don't know if it's relevant, but lspci thinks the chipset is a AR9227
but in syslog it says AR9287... The device is a cheap, single antenna
PCI card (not PCIexpress).

It might be interesting to note that with a live version of xubuntu
13.04 (I forgot the kernel version), NM was able to show me a list of
the networks right before it froze.

For the record, the device is working on Windows, so it is not broken.

Thanks,
Bertrand
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