I am running 64 bit Ubuntu 11.04 - the Natty Narwhal .
I had Linksys WMP54GS (PCI) working fine but recently I acquired TP-Link PCI-E, model TL-WN781ND Ver 2.1, because report said it being supported by Linux. However, it is not the case for me, somehow.
I have searched and searched, even tried rebuilding the kernel but failed to update grub (followed all the instruction but grub does not list newly built kernel).
Here is the output of various probes:
Linux bpSSD 2.6.38-16-generic #67-Ubuntu SMP Thu Sep 6 17:58:38 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
bp@bpSSD:~$ modprobe --list | grep wireless |grep ath9k
bp@bpSSD:~$ lsmod |grep ath9k
ath9k 118238 0
mac80211 294370 1 ath9k
ath9k_common 13851 1 ath9k
ath9k_hw 323077 2 ath9k,ath9k_common
ath 23773 2 ath9k,ath9k_hw
cfg80211 178528 3 ath9k,mac80211,ath
bp@bpSSD:~$ dmesg | grep ath9k
[ 6.510784] ath9k 0000:05:00.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18
[ 6.510794] ath9k 0000:05:00.0: setting latency timer to 64
[ 6.563294] ath9k 0000:05:00.0: Failed to initialize device
[ 6.575161] ath9k 0000:05:00.0: PCI INT A disabled
[ 2111.640089] ath9k: Driver unloaded
[ 2129.710020] ath9k 0000:05:00.0: Refused to change power state, currently in D3
[ 2129.710031] ath9k 0000:05:00.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18
[ 2129.814994] ath9k 0000:05:00.0: Failed to initialize device
[ 2129.815045] ath9k 0000:05:00.0: PCI INT A disabled
[ 2129.815053] ath9k: probe of 0000:05:00.0 failed with error -5
I tried Linux-Secure-12.10 Live CD and it works fine out of the box. This card works under Windows Vista 32 Bit fine.
What am I doing wrong? Any help?