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From: John Baldwin <jhb@freebsd.org>
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 Daniel Eischen <deischen@freebsd.org>
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Cc: current@freebsd.org
Subject: Re: ath0 no longer attaches, cardbus problems?
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On Wednesday, August 24, 2011 8:19:42 pm Daniel Eischen wrote:
> Hello,
> 
> I have an older Dell 4150 laptop that takes forever to build
> world, so I don't update it that often.  The last time I
> updated it was March 1, 2010.  I just updated the system
> yesterday and ath0 (a Linksys PCCard) no longer attaches.
> 
> The interesting thing is that ath0 is detected at different
> addresses between the working kernel and the non-working
> kernel:
> 
>    March 1, 2010 kernel
>    --------------------
>    ath0: <Atheros 5212> mem 0x88000000-0x8800ffff irq 11
>        at device 0.0 on  cardbus0
>    ath0: [ITHREAD]
>    ath0: AR5212 mac 5.9 RF5112 phy 4.3
> 
> 
>    Aug 23, 2011 kernel
>    -------------------
>    ath0: <Atheros 5212> mem 0xf8f10000-0xf8f1ffff irq 11
>        at device 0.0 on  cardbus0
> 
> 
> I've tried forcing successful returns from
> ar5212SetPowerModeAwake() and ar5212SetResetReg()
> but it doesn't help (diffs below).
> 
> Any suggestions on how to get this to work?
> Full dmesg from working and non-working kernels at
> 
>    http://people.freebsd.org/~deischen/ath/ath.dmesg

You can try setting 'debug.acpi.disable=hostres' at the loader prompt as a 
test.  If that doesn't work, a verbose dmesg from the broken case as well as 
devinfo -u and devinfo -r output from the working and broken cases would be 
most useful.

-- 
John Baldwin