Re: [Xen-users] reboot on booting xen-unstable

[Rolu <rolu@xxxxxxxx>]

On Sat, Jun 9, 2012 at 3:15 AM, Rolu <rolu@xxxxxxxx> wrote:
> On Thu, Jun 7, 2012 at 3:15 PM, Rolu <rolu@xxxxxxxx> wrote:
>> I've compiled Xen unstable from source and tried using it. When
>> booting I do see Xen starting, but at the point where I normally start
>> getting the dom0 kernel messages I just get a black screen for a few
>> seconds, and then the machine reboots. It leaves no messages or log
>> files, of course.
>>
>> revision I compiled: 25459
>> OS: ubuntu 12.04
>> dom0 kernel 3.2.0-24 (also tried -23), from the repositories. This
>> kernel works with Xen 4.1 from the repositories.
>>
>
> I just got it to boot with a newer kernel.
>
> Ubuntu provides recent builds of mainline kernels (details
> https://wiki.ubuntu.com/Kernel/MainlineBuilds?action=show&redirect=KernelMainlineBuilds).
> I downloaded and installed the newest kernel for Ubuntu 12.04
> (precise) from http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.4-precise/
>
> root@panda:~# uname -a
> Linux panda 3.4.0-030400-generic #201205210521 SMP Mon May 21 09:22:02
> UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
>
> Still, it could take a long time for that to end up in the default
> Ubuntu kernel, and it might actually be one of Ubuntu's patches that
> broke it. I would much prefer to run with a stock Ubuntu kernel too,
> so this isn't quite solved yet.

I brought this up on the xen-devel list. See
http://lists.xen.org/archives/html/xen-devel/2012-06/msg00998.html

The advice was to add xsave=0 to the Xen kernel line in grub. This
worked and I got the default 3.2 kernel to boot.

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