Freeze with 3.8rc2 and ath

Markus Pfeiffer markus.pfeiffer at
Wed Jun 4 13:19:49 PDT 2014


First note that dfly switched to a new usb stack recently. This is now the
default and wiggly in places. Unless you configured your kernel to use oldusb,
you'll be using the new usb stack.

If you are using the new usb stack, something does not add up here. 
The usb ath driver is called if_uath and creates a device uathX. One should
then create a wlan device using

ifconfig wlan0 wlandev uath0


But even then, uath is not ported yet afaict, the module does ot build for me.


On Wed, Jun 04, 2014 at 09:50:35PM +0200, Sven Gaerner wrote:
> Hi,
> After seeing that 3.8rc2 has been announced, I switched branches, build
> and installed the world and the kernel and rebooted.
> And then I saw the system freezing.
> I tracked this down that whenever I run "ifconfig ath0 up" the systems
> stops working immediately. I set kern.alt_break_to_debugger and
> kern.break_to_debugger to 1, but the keyboard (attached via USB) is also
> dead. Only a hardware reset works.
> Release 3.6 worked just fine, also with this WLAN network adapter.
> Did someone else saw such freezes? Is there anything I can do to track
> this freeze down?
> The freeze also occurs if I load the ath kernel module via
> /boot/loader.conf. The /boot/loader.conf contains only one line that
> sets vfs.root.mountfrom. So nothing special here.
> Uname says, the kernel is v3.8.0rc2.1.g358af0-RELEASE (X86_64_GENERIC).
> This is a 64bit system.
> Unfortunately there is no dump available.
> Sven
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