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Date: Wed, 30 Apr 2014 10:30:01 -0700 (PDT)
From: Don Lewis <truckman@FreeBSD.org>
Subject: Re: Thinkpad R60 hangs when booting recent 8.4-STABLE
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On 30 Apr, John Baldwin wrote:
> On Tuesday, April 29, 2014 9:17:19 pm Don Lewis wrote:
>> On 29 Apr, John Baldwin wrote:
>> > On Monday, April 28, 2014 8:56:03 pm Don Lewis wrote:
>> 
>> I just took a closer look at the dmesg output from the two kernels.
>> 
>> >> agp0: <Intel 82855 host to AGP bridge> on hostb0
>> >> hostb0: Reserved 0x10000000 bytes for rid 0x10 type 3 at 0xd0000000
>> 
>> The above line is different with the r262226 kernel:
>>  hostb0: Reserved 0x10000000 bytes for rid 0x10 type 3 at 0
> 
> Yes, a resource at 0 is going to break things.  9.2 has the NEW_PCIB option
> enabled.  You can try enabling that for 8.4 to see if it fixes this issue.
> If it does, it narrows down where to look for the bug.

It behaves the same way with NEW_PCIB.  I see hostb at 0 and then the
hang shortly thereafter.