I have the same wireless chip set, also in a mac book pro.
The wireless connects for a while, then will kick me off. It won't
reconnect and it stops other applications from launching properly, and
stops me from authenticating when using sudo.
When it kicks me off, if I try to launch a new application, the window
opens, but it has no content. I can't take a screenshot of it.
I also couldn't authenticate using sudo when I try to 'sudo rmmod
ath9k'.
Shutting down does not happen properly either. Although the laptop
shuts down, when I restart, I have to fsck the disks as they aren't
unmounted properly.
Restarting doesn't help, a full shutdown (and remove the battery) seems
to be the only way to get the wireless working again for me.
As it stands, I have to use a wired connection as I do not want to risk
damaging the file system and having to re-install again.
My kern.log gets the following line repeated many times when this problem
occurs.
Oct 26 14:18:05 Zodac kernel: [ 6493.762514] DMA: Out of SW-IOMMU space for
4224 bytes at device 0000:0b:00.0
lspci -v (pretty much the same as Jacob's)
0b:00.0 Network controller: Atheros Communications Inc. AR5008 Wireless Network
Adapter (rev 01)
Subsystem: Apple Computer Inc. Device 0087
Flags: fast devsel, IRQ 16
Memory at d7300000 (64-bit, non-prefetchable) [size=64K]
Capabilities: [40] Power Management version 2
Capabilities: [50] Message Signalled Interrupts: Mask- 64bit- Queue=0/0
Enable-
Capabilities: [60] Express Legacy Endpoint, MSI 00
Capabilities: [90] MSI-X: Enable- Mask- TabSize=1
Capabilities: [100] Advanced Error Reporting <?>
Capabilities: [140] Virtual Channel <?>
Kernel modules: ath9k
If there is any more information I can give you, please ask.
--
ath9k causes system lockup
https://bugs.launchpad.net/bugs/289356
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