From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: Roger Cruz <roger.cruz@virtualcomputer.com>
Cc: xen-devel@lists.xensource.com
Subject: Re: Can't reboot Dell Latitude E6420
Date: Wed, 25 May 2011 17:19:00 -0400 [thread overview]
Message-ID: <20110525211900.GA20444@dumpdata.com> (raw)
In-Reply-To: <EACA7CA90354A849B1315959042A052C0109466E@BE24.exg4.exghost.com>
On Wed, May 25, 2011 at 03:09:54PM -0500, Roger Cruz wrote:
>
> I'm running Xen 4.0.1 on a Sandybridge-based Dell Latitude E6420 and I'm finding that the platform reboot operation hangs.
Is that the prototype one?
>
> I've done some investigation and have tracked down the code that dom0 makes in order to reboot the platform is HYPERVISOR_sched_op(SCHEDOP_shutdown, code),
> where 'code' is SHUTDOWN_reboot. This hypercall makes its way to the Xen routine machine_restart() in xen/arch/x86/shutdown.c which performs a reboot based on the default reboot_type=BOOT_ACPI. I have overrode the reboot_type and made it BOOT_TRIPLE and BOOT_KBD, and both of these options still hang after the invocation that is supposed to reboot the platform.
>
> I experienced the same behavior from a serial Xen console 'R' reboot action, which is expected since it too calls machine_restart().
>
> I'm out of ideas here as to why these reboot calls are not working. I figured that the triple fault of the processor would be one that always works but it still hangs for me. Anyone have any ideas or suggestions for additional tests?
Hm, you could fiddle with the Northbridge: http://smackerelofopinion.blogspot.com/2011/02/turning-off-pc-using-intel-82801-io.html?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+ASmackerelOfOpinion+%28A+Smackerel+of+Opinion%29
.. how did it reboot in the past? Does it reboot when you run under baremetal? I wonder what mechanism the baremetal
employs - it might be that we are missing one for the Dell machines (check the DMI lookup tables in the Linux kernel)?
>
> Thank you in advance.
>
> Roger R. Cruz
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
next prev parent reply other threads:[~2011-05-25 21:19 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-25 20:09 Can't reboot Dell Latitude E6420 Roger Cruz
2011-05-25 21:19 ` Konrad Rzeszutek Wilk [this message]
2011-05-26 15:23 ` Roger Cruz
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20110525211900.GA20444@dumpdata.com \
--to=konrad.wilk@oracle.com \
--cc=roger.cruz@virtualcomputer.com \
--cc=xen-devel@lists.xensource.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).