[Fedora-xen] Can't boot xen0 with ACPI enabled

Gregor Pirnaver gregor.pirnaver at email.si
Wed Apr 5 13:04:36 UTC 2006


Computer booting to xen0 hangs if I don't disable ACPI (computer has two Xeon 
processors). Even "acpi=ht" doesn't work.  
 
 
The last lines displayed are many messages like:  
... 
PCI: BRIDGE ... 
    IO window: disabled 
    MEM window: disabled 
    PREFETCH window: disabled 
... 
and before that two lines with something like: 
PCI: Cannot allocate resource region 4 of device ... 
 
 
 
With ACPI disabled it boots normally: 
 
/boot/grub/menu.lst:  
...  
title Fedora Core (2.6.16-1.2080_FC5xen0)  
        root (hd0,0)  
        kernel /xen.gz-2.6.16-1.2080_FC5 acpi=off  
        module /vmlinuz-2.6.16-1.2080_FC5xen0 ro root=/dev/VolGroup00/LogVol00  
        module /initrd-2.6.16-1.2080_FC5xen0.img  
...  
 
Is there anything I can do to get hyper-threading working? 

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