Hi Xiaoyang,



did you check whether both kernels are configured to support USB?

# cat /proc/config

or

# zcat /proc/config.gz



Cheers,

Nenad.



  _____

Von: qemu-devel-bounces+nenad=cimerman.de@nongnu.org
[mailto:qemu-devel-bounces+nenad=cimerman.de@nongnu.org] Im Auftrag von Yu,
Xiaoyang
Gesendet: Mittwoch, 14. Februar 2007 11:26
An: qemu-devel@nongnu.org
Betreff: RE: [Qemu-devel] USB storage cannot be recognized on guest
Linuxdomain?



I just found that using an older kernel in Fedora Core 4 may “solve” the
problem.



When I tested Fedora Core 4 guest domain, the kernel version I used was 2.6.
17-1.2142_FC4, and it cannot recognized the USB disk.

I just changed the kernel in guest domain to version 2.6.11-1.1369_FC4. Then
the guest domain can recognized the USB disk. I am wondering why the USB
support in QEMU depend on the guest domain kernel. And I would like to know
which kernel version can support QEMU USB emulation.



BTW, I also found that Windows XP guest domain can not recognize the USB
disk, while Windows XP SP2 guest domain can recognize the USB disk. So it
seems like that the guest Linux/Windows domain should have some “special
feature” to work with the QEMU USB emulation successfully. Isn’t it
strange?





Sent: 2007年2月14日 15:06
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] USB storage cannot be recognized on guest Linux
domain?



I am using Xen 3.0.3 with QEMU-DM 0.8.2 on a Intel VT platform. After insert
a USB storage, and use “usb_add” command in QEMU monitor, the storage
should be recognized on guest OS. I tested this with a Windows XP SP2 guest
OS, it doing well.



But when I test the “usb_add” command with some Linux guest OS, it seems
that the guest OS cannot recognize the USB storage. And the device number
and address in guest domain are always “0.0”. The Linux guest OS I tested
including Fedora Core 4 and Fedora Core 5. Does any one also meet this
problem or have some idea on this? Feedbacks will be highly appreciated.



Thanks
Xiaoyang