Manuel Bouyer wrote:
> On Sat, Mar 31, 2007 at 05:22:20PM -0500, david l goodrich wrote:
>> I decided it would be a good idea to move a 4.0_BETA2 dom0 from under  
>> my desk to over with my other servers.
>>
>> when i powered the machine back on after the move, the XEN3_DOM0  
>> kernel won't boot, it hangs at
>>
>> uhci1 at pci0 dev 29 function 1: Intel 82801GB/GR USB UHCI Controller  
>> (rev. 0x01)
>>
>> but a GENERIC kernel will boot through grub's 'chainloader' just fine.
>>
>> i'd just say wipe the hard drives and start over, but this has domUs  
>> and data on it that i'd like to keep.  and the stupid thing /used/ to  
>> boot.
>>
>> my / drive is small, of course.
>>
>> nialas# df /
>> Filesystem  1K-blocks      Used     Avail Capacity  Mounted on
>> /dev/raid0a    508143    188655    294081    39%    /
>> nialas#
>>
>> the dmesg from GENERIC is below.  any ideas?  thanks.
> 
> If you add -c to the kernel's boot command line, and enter
> disable uhci
> quit
> 
> does it boot ? 

for those reading this later on that are confused like i was, this is 
just to say add "-c" to the end of the "module" line in the appropriate 
/grub/menu.lst entry.

unfortunately, all disabling uhci did was push the freeze back:

piixide1 at pci0 dev 31 function 2
piixide1: Intel 82801G/GR Serial ATA/Raid Controller (ICH7) (rev. 0x01)
piixide1: bus-master DMA support present
piixide1: primary channel configured to native-PCI mode
[hang]

i should note that the way I have determined it is hung is that 1) it 
obviously doesn't progress any further in the boot process and 2) the 
keyboard interrupts are no longer detected - capslock and numlock no 
longer cause the keyboard lights to change.

> Maybe you have updated this kernel recently, without
> rebooting ?
> 

no, this is not something I would do.  well, i hope not.
Besides, I have also tried booting with a new XEN3_DOM0 kernel from 
ftp.netbsd.org's most recent daily build, and had the same problem.  In 
fact, this most recent hang at piixide1 is using 
<ftp://ftp.netbsd.org/pub/NetBSD-daily/netbsd-4/200703280002Z/i386/binary/kernel/netbsd-XEN3_DOM0.gz>, 
gunzipped, of course.
   --david