[Bug 586804] [NEW] Kernel hangs on boot after updates

[Sean McNamara]

Public bug reported:

I have a Mac Mini 3,1 (MC239) with an Intel P8700 2.53 GHz CPU.

I installed rEFIt onto the internal HDD, to enable dual booting Mac OS X
and Ubuntu.

I then installed Ubuntu 10.04 x86_64 from a verified DVD media onto a
500GB USB external hard drive. During install, I opted to install GRUB
onto /dev/sdb1 (the /boot partition of Ubuntu).

The Live CD reliably boots fine, and the installed system booted fine
initially.

The only thing I did after installing the system is grab all updates
using Update Manager. After that, the system would reliably hang with
the 2.6.32.22.23 kernel. I disabled the quiet mode and splash screen and
took a picture of the screen: http://tiyukquellmalz.org/ubuntu_hang.jpg

After encountering the hang with 2.6.32-22, I was able to get booting
again with the 2.6.32-21 kernel. I tried the 2.6.32-22-preempt kernel,
and installed the backports modules for it as well.

I tried passing noapic, noacpi, and both together on the kernel command
line for the 2.6.32-22 kernel, and it still wouldn't boot, neither the
generic flavor nor the preempt.

Now, after several tries, I can't get the 2.6.32-21 kernel to boot,
either. It emits the same behavior as visible in the image I posted.

Is this really an issue with the 2.6.32-22 update, or am I experiencing
some kind of heisenbug where one of my cores just isn't coming online?

(And FWIW, I give the kernel about 5 minutes to un-freeze each time, but
usually when it gets to that particular line and stops, I know it's dead
-- because when it works, it only takes a split second on that line.)

System reliably worked with Ubuntu 9.10 + updates.

P.S. -- I have no restricted drivers installed, even though the nvidia
and broadcom drivers are available according to jockey.

** Affects: linux-meta (Ubuntu)
     Importance: Undecided
         Status: New

-- 
Kernel hangs on boot after updates
https://bugs.launchpad.net/bugs/586804
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