Re: amd64 panic snd_hda - hdac_get_capabilities: Invalid corb size (0)

On Tue, 2010-07-27 at 12:58 +0100, Anton Shterenlikht wrote:
> On Tue, Jul 27, 2010 at 11:23:24AM +0100, Gavin Atkinson wrote:
> > On Mon, 2010-07-26 at 14:24 +0100, Anton Shterenlikht wrote:
> > > On amd64 r210496 I get this panic when booting a kernel
> > > with snd_hda(4). I haven't used this driver before, so
> > > can't say if this is a regression.
> > > 
> > > (copied by hand)
> > > 
> > > hdac0: <ATI SB600 High Definition Audion Controller> irq 16 at device 20.2 on pci0
> > > hdac0: HDA Driver Revision: 20100226_0142
> > > hdac0: [ITHREAD]
> > > hdac0: hdac_get_capabilities: Invalid corb size (0)
> > > device_attach: hdac0 attach returned 6
> > > Slab at 0xffffff000261eb18, freei 3 = 0
> > > panic: Duplicate free of item 0xffffff0002661c00 from zone 0xffffff00b7f9a500(1024)
> > > 
> > > cpuid = 0
> > > KDB: enter: panic
> > > [ thread pid 0 tid 100000 ]
> > > Stopped at kdb_enter+0x3d: movq      $0,0x74f360(%rip)
> > > db>bt
> > > 
> > > (very long output.. ending in)
> > 
> > Can you give us this output please?  At least the "panic()" line and the
> > next six or so lines?
> > 
> 
> ok, will do.
> I wish the modern laptops had a serial link..

Indeed.  I keep buying Toshibas, who still have a range with serial
ports.

Having said that, have you tried to use the dcons stuff over firewire?
That usually works pretty well in my experience.
http://wiki.freebsd.org/DebugWithDcons

Thanks,

Gavin

-- 
Gavin Atkinson
FreeBSD committer and bugmeister