patch-2.6.21-rc6-rt0 hangs on boot on amd64

patch-2.6.21-rc6-rt0 hangs on boot on amd64

[Free Ekanayaka]

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I'm new to the list.
I've built the 2.6.21-rc6 kernel release and it seems to work fine on
an amd64 HP Pavillon zv5000 laptop, using this config:
http://people.64studio.com/~free/config-2.6.21-rc6
However the system hangs on boot if I try to apply the 2.6.21-rc6-rt0
realtime patch, with this config:
http://people.64studio.com/~free/config-2.6.21-rc6-rt0
(diffing the two configs shows a lot of differences, but as far as I
can tell what I did was simply to run makeconfig from the first config
after having applied the patch).
The systems hangs when the on of the script contained in the standard
Debian ramfs image tries to launch udevsettle. 
The script is /scripts/init-premount/udev, inside the ramfs image, you
find a copy here:
http://people.64studio.com/~free/udev
If I try to boot the patch kernel using qemu, than everything works,
so it might also be a problem specific to this hardware.
Hints?
Ciao!
Free

Re: patch-2.6.21-rc6-rt0 hangs on boot on amd64

[Andrew Burgess]

>I've built the 2.6.21-rc6 kernel release and it seems to work fine on
>an amd64 HP Pavillon zv5000 laptop, using this config:
>http://people.64studio.com/~free/config-2.6.21-rc6
>However the system hangs on boot if I try to apply the 2.6.21-rc6-rt0
>realtime patch, with this config:
>http://people.64studio.com/~free/config-2.6.21-rc6-rt0
..
>The systems hangs when the on of the script contained in the standard
>Debian ramfs image tries to launch udevsettle. 

My AMD64 X2 non-laptop hangs as well. The screen blanks so I'm guessing it was
in the middle of switching to X11. Vanilla rc6 works fine. Compiled as SMP x86_64.

Re: patch-2.6.21-rc6-rt0 hangs on boot on amd64

[Free Ekanayaka]

|--==> Andrew Burgess writes:

  >>I've built the 2.6.21-rc6 kernel release and it seems to work fine on
  >>an amd64 HP Pavillon zv5000 laptop, using this config:
  >>http://people.64studio.com/~free/config-2.6.21-rc6
  >>However the system hangs on boot if I try to apply the 2.6.21-rc6-rt0
  >>realtime patch, with this config:
  >>http://people.64studio.com/~free/config-2.6.21-rc6-rt0
  AB> ..
  >>The systems hangs when the on of the script contained in the standard
  >>Debian ramfs image tries to launch udevsettle. 

  AB> My AMD64 X2 non-laptop hangs as well. The screen blanks so I'm guessing it was
  AB> in the middle of switching to X11. Vanilla rc6 works fine. Compiled as SMP x86_64.

Hi all,

I've just tested 2.6.21-rc7 plus patch-2.6.21-rc6-rt0, it still hangs
when the boot scripts try to run udevtrigger. Please let me know if
there are traces/logs I could provide to help the developers debug
this problem.

Thanks,

Free