Hi ,Guys

I installed CentOS5.2-x86_64 on my Dell PowerEndger 1950 with virtualization component ,when reboot the system halted at:
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Red Hat nash version 5.1.19.6
usb 1-5: device not accepting address 4 ,error -110
usb 1-5: device not accepting address 5, error -110
usb 1-5: device not accepting address 6,error -110
usb 1-5: device not accepting address 7,error -110
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I also installed CentOS5.2-x86_64 on the same Dell PowerEndger 1950 without virtualization component,everything work properly.
I download the xen-3.3-testing.hg using "hg clone http://xenbits.xensource.com/xen-3.3-testing.hg" command,then i followed its README :
make world
make install
depmod 2.6.18.8-xen
mkinitrd -v -f --with=aacraid --with=sd_mod --with=scsi_mod /boot/initrd-2.6.18.8-xen.img 2.6.18.8-xen
modify the grub,so that i can boot with xen-dom0

when I reboot with xen-dom0,the system also halted at:
///////////////////////////////////////////////////////////
Red Hat nash version 5.1.19.6
usb 1-5: device not accepting address 4 ,error -110
usb 1-5: device not accepting address 5, error -110
usb 1-5: device not accepting address 6,error -110
usb 1-5: device not accepting address 7,error -110
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the following infomation is the out of lspci on my Dell PowerEndger 1950:
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00:00.0 Host bridge: Intel Corporation 5000X Chipset Memory Controller Hub (rev 12)
00:02.0 PCI bridge: Intel Corporation 5000 Series Chipset PCI Express x4 Port 2 (rev 12)
00:03.0 PCI bridge: Intel Corporation 5000 Series Chipset PCI Express x4 Port 3 (rev 12)
00:04.0 PCI bridge: Intel Corporation 5000 Series Chipset PCI Express x8 Port 4-5 (rev 12)
00:05.0 PCI bridge: Intel Corporation 5000 Series Chipset PCI Express x4 Port 5 (rev 12)
00:06.0 PCI bridge: Intel Corporation 5000 Series Chipset PCI Express x8 Port 6-7 (rev 12)
00:07.0 PCI bridge: Intel Corporation 5000 Series Chipset PCI Express x4 Port 7 (rev 12)
00:08.0 System peripheral: Intel Corporation 5000 Series Chipset DMA Engine (rev 12)
00:10.0 Host bridge: Intel Corporation 5000 Series Chipset FSB Registers (rev 12)
00:10.1 Host bridge: Intel Corporation 5000 Series Chipset FSB Registers (rev 12)
00:10.2 Host bridge: Intel Corporation 5000 Series Chipset FSB Registers (rev 12)
00:11.0 Host bridge: Intel Corporation 5000 Series Chipset Reserved Registers (rev 12)
00:13.0 Host bridge: Intel Corporation 5000 Series Chipset Reserved Registers (rev 12)
00:15.0 Host bridge: Intel Corporation 5000 Series Chipset FBD Registers (rev 12)
00:16.0 Host bridge: Intel Corporation 5000 Series Chipset FBD Registers (rev 12)
00:1c.0 PCI bridge: Intel Corporation 631xESB/632xESB/3100 Chipset PCI Express Root Port 1

(rev 09)
00:1d.0 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset UHCI USB Controller

#1 (rev 09)
00:1d.1 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset UHCI USB Controller

#2 (rev 09)
00:1d.2 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset UHCI USB Controller

#3 (rev 09)
00:1d.7 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset EHCI USB2 Controller

(rev 09)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev d9)
00:1f.0 ISA bridge: Intel Corporation 631xESB/632xESB/3100 Chipset LPC Interface Controller

(rev 09)
01:00.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID SAS 1078 (rev 04)
02:00.0 PCI bridge: Broadcom EPB PCI-Express to PCI-X Bridge (rev c3)
03:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5708 Gigabit Ethernet (rev

12)
04:00.0 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express Upstream Port (rev 01)
04:00.3 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express to PCI-X Bridge (rev 01)
05:00.0 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express Downstream Port E1 (rev

01)
05:01.0 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express Downstream Port E2 (rev

01)
0e:0d.0 VGA compatible controller: ATI Technologies Inc ES1000 (rev 02)


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Is anybody know why ?