usually the wireless on my laptop is fine except at the coffee shop where I study a lot. Get shoddy connection, but more troubling than that, sometimes I can't get an IP from the router at all while my friends are browsing away, and a reboot usually fixes it. Even more troubling is that sometimes i'll get little CPU "hiccups" when the connection is poor. They roughly correlate to these in dmesg:
[ 947.632309] ath9k: RX failed to go idle in 10 ms RXSM=0xdeadbeef
[ 954.851954] ath9k: timeout (100000 us) on reg 0x806c: 0xdeadbeef & 0x01f00000 != 0x00000000
[ 954.852125] ath9k: RX failed to go idle in 10 ms RXSM=0xdeadbeef
when I get this hiccups it will stutter my music player regardless of its nice priority. I try unloading and loading ath9k but that doesn't change anything. Anyone have any ideas?
anewson@melvin:~$ uname -r
anewson@melvin:~$ cat /etc/issue
Ubuntu 10.04.2 LTS \n \l
I'm no expert for Ubuntu, but if it was Windows I would say: check if there is any "Energy-Saving-Option" enabled for the Wlan-adapter. I don't know if Ubuntu comes with such options in their programs.
Edit: I have the same wireless-adapter in my laptop and I've looked in Win 7 (which I've also installed on the machine) there is an Energysavemode in Windows. Maybe it is really used in Linux as well.
there is a power management feature for the card, but I disabled it when the problem started.
just an update: the CPU spikes are in the [phyX] process (where X=number that increases, I think when I unload/reload driver), which is a network layer or something? Not sure if that's any help.
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