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Re: bad DMAR interaction with iwlagn and SATA

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Hi,

On Friday 26 September 2008, you wrote in "Re: bad DMAR interaction with 
iwlagn and SATA":
> > [ 4184.617392] DMAR:[DMA Read] Request device [03:00.0] fault addr
> > fa946000 [ 4184.617393] DMAR:[fault reason 06] PTE Read access is not set
> > [ 4184.644081] iwlagn: Microcode HW error detected.  Restarting. [
> > 4186.646000] psmouse.c: TouchPad at isa0060/serio1/input0 lost
> > synchronization, throwing 1 bytes away. [ 4186.683034] Registered led
> > device: iwl-phy0:radio
> > [ 4186.683478] Registered led device: iwl-phy0:assoc
> > [ 4186.683793] Registered led device: iwl-phy0:RX
> > [ 4186.684094] Registered led device: iwl-phy0:TX
> > [ 4186.689749] wlan0: authenticate with AP 00:1d:7e:42:fe:42
> > [ 4186.691691] wlan0: authenticated
> > [ 4186.691705] wlan0: associate with AP 00:1d:7e:42:fe:42
> > [ 4186.696380] wlan0: RX ReassocResp from 00:1d:7e:42:fe:42 (capab=0x411
> > status=0 aid=2) [ 4186.696392] wlan0: associated

> > Most of the time when this happened, the machine wasnt reacting for 1-3
> > seconds and had audio buffer underruns, but I also had a hard lockup
> > which I couldnt diagnose so far.
> I suspect the hard lockup was due to a BUG_ON in the iwlagn driver, if
> you can reproduce this either try applying the patch here [1] or going
> to a VC to see if it crashes there. It's a BUG_ON in iwl-tx.c.
Could not reproduce so far - it is rather hard working on the machine with 
DMAR enabled because I get 1-5s lockups all the time like described above...

Andres

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