[Qemu-devel] [Bug 319014] Re: serial usb-device can't be passed-through to a guest

[Nico Prenzel]

Hello Anthony,

which qemu-kvm version do you expect to work with serial usb devices?

After you've changed this ticket status and I've checked it again with qemu-kvm 
version 0.12.4. The reported error message is gone away and the device is 
present in the guest. The cdc_acm driver loads too without any visible 
problems, but the device is still unusable.
The device data led flash if it gets un/initialized by minicom.
But if I try to make a test dial, nothing happens after I call a phone number.

To be more precise:
-host dosn't have loaded the cdc_acm driver
-guest loads the cdc_acm driver
-a dial with minicom to the same phone number works on the host, if I load the 
cdc_acm within the host

I would like to get this fixed, as I really want to use this usb-device
as my dusty fax again.

-- 
serial usb-device can't be passed-through to a guest
https://bugs.launchpad.net/bugs/319014
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Status in QEMU: Fix Released
Status in CentOS: New

Bug description:
Hello,

I use Debian Lenny with qemu/kvm version 79. If I try to pass-through my "US 
Robotics 56K USB Modem Model 5637" to any guest, I get an 
perror("usb_linux_update_endp_table").
So, I've searched through the qemu-devel archives and found the following 
thread:
http://www.archivum.info/address@hidden/2008-10/msg00299.html
If I remove the "return 1;" as stated above my usb modem get's successfully 
passed-through to the guest and the modem works fine.
Is there any chance to get serial usb devices to work out of standard qemu/kvm, 
without the need to apply this line to every qemu/kvm version?

NicoP.