Messages in this thread | | | Date | Sun, 8 Oct 2006 18:51:25 +0000 | From | Pavel Machek <> | Subject | Re: Machine reboot |
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On Thu 05-10-06 18:05:18, Lukas Hejtmanek wrote: > On Thu, Oct 05, 2006 at 08:58:22PM +0900, Magnus Damm wrote: > > A long shot, but switching to real mode does not work if the cpu is > > running in VMX root mode ie on hardware with Intel VT extensions > > enabled. So if you are using some kind of kernel virtualization module > > on rather new hardware, consider rmmod:ing the module before > > rebooting. > > > > I'm about to post patches for kexec that fixes this problem, but I'm > > not sure about the current reboot status. > > You are right, I'm using Intel Core 2 Duo processor with DP965LT board that is > capable of VT extensions. However, I'm using vanilla 2.6.18 kernel in X86_64, > no additional patches, nor XEN or VMWARE is running (even their modules are > not loaded). Moreover, SYSRQ-B (emergency reboot) works fine. System graceful > reboot does not work.
Of course... copy/paste pieces of sysrq-b sequence into regular sequence to find out what the critical difference is... no, it will not be easy.
Perhaps your box *likes* to reboot with apic on or something? Perhaps device_shutdown() breaks your ability to reboot?
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