(Regression) Ubuntu 14.10 installation fails for pci-ohci USB disk

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Problem Description
=================
(Regression) Ubuntu 14.10 installation fails for pci-ohci USB disk, Installer not able to detect the driver for the device.

---uname output---
Linux ubuntuAug10 3.16.0-6-generic #11-Ubuntu SMP Mon Jul 28 02:00:45 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux

Machine Type = 8284-22A

pKVM version:
[root@lep8a ~]# cat /etc/issue
IBM_PowerKVM release 2.1.1 build 5 alpha (pkvm2_1_1)
Kernel \r on a \m (\l)

Steps to Reproduce
=================
 1. This is an regression issue which worked with Ubuntu 14.10 kernel version
Linux ubuntuT15 3.15.0-6-generic #11-Ubuntu SMP Thu Jun 12 00:40:49 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux

2. use the below XML to install the OS on USB disk.
[root@lep8a manu]# virsh dumpxml GMT_ubuntu14_10_ohci
<domain type='kvm' id='90'>
  <name>GMT_ubuntu14_10_ohci</name>
  <uuid>d00751c0-fa01-9b84-52c3-6354567845e0</uuid>
  <memory unit='KiB'>2048000</memory>
  <currentMemory unit='KiB'>2048000</currentMemory>
  <vcpu placement='static'>16</vcpu>
  <resource>
    <partition>/machine</partition>
  </resource>
  <os>
    <type arch='ppc64' machine='pseries'>hvm</type>
    <boot dev='hd'/>
    <boot dev='cdrom'/>
  </os>
  <features>
    <acpi/>
    <apic/>
    <pae/>
  </features>
  <clock offset='utc'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>restart</on_crash>
  <devices>
    <emulator>/usr/bin/qemu-kvm</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2'/>
      <source file='/var/lib/libvirt/images/manu/Gubunut_usb_h1.qcow2'/>
      <backingStore/>
      <target dev='sda' bus='usb'/>
      <alias name='usb-disk0'/>
    </disk>
    <disk type='file' device='cdrom'>
      <driver name='qemu' type='raw'/>
      <source file='/var/lib/libvirt/images/manu/ISO/utopic-server-ppc64el.iso'/>
      <backingStore/>
      <target dev='sdb' bus='scsi'/>
      <readonly/>
      <alias name='scsi0-0-0-1'/>
      <address type='drive' controller='0' bus='0' target='0' unit='1'/>
    </disk>
    <controller type='usb' index='0' model='pci-ohci'>
      <alias name='usb0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
    </controller>
    <controller type='pci' index='0' model='pci-root'>
      <alias name='pci.0'/>
    </controller>
    <controller type='scsi' index='0'>
      <alias name='scsi0'/>
      <address type='spapr-vio' reg='0x2000'/>
    </controller>
    <controller type='scsi' index='1' model='ibmvscsi'>
      <alias name='scsi1'/>
      <address type='spapr-vio' reg='0x3000'/>
    </controller>
    <interface type='bridge'>
      <mac address='52:54:c0:a8:7a:73'/>
      <source bridge='virbr0'/>
      <target dev='vnet12'/>
      <model type='virtio-net'/>
      <alias name='net0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0'/>
    </interface>
    <serial type='pty'>
      <source path='/dev/pts/13'/>
      <target port='0'/>
      <alias name='serial0'/>
      <address type='spapr-vio' reg='0x30000000'/>
    </serial>
    <console type='pty' tty='/dev/pts/13'>
      <source path='/dev/pts/13'/>
      <target type='serial' port='0'/>
      <alias name='serial0'/>
      <address type='spapr-vio' reg='0x30000000'/>
    </console>
    <memballoon model='virtio'>
      <alias name='balloon0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    </memballoon>
  </devices>
  <seclabel type='dynamic' model='selinux' relabel='yes'>
    <label>system_u:system_r:svirt_t:s0:c238,c786</label>
    <imagelabel>system_u:object_r:svirt_image_t:s0:c238,c786</imagelabel>
  </seclabel>
</domain>

3. during configuration of the disk, It fails to detect the USB driver, refer attached snapshot.

Install ISO Information: August 10th Build

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Default Comment by Bridge

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1355686/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

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------- Comment From <email address hidden> 2014-08-28 06:44 EDT-------
Hi

I tried on 27-Aug-2014 ISO but still issue persists .I am geting same screen what manu attached.

Regards
Praveen

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------- Comment From <email address hidden> 2014-09-02 08:23 EDT-------
Any progress on this defect ?

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------- Comment From <email address hidden> 2014-09-18 20:59 EDT-------
(In reply to comment #12)
> However we could help specify when it last worked.
>
> based on our test records, it has worked on July 16th 2014 [snip]
> Linux ubuntuT15 3.15.0-6-generic [...]
>
> and the regression issue was found on August 10th Build.
>
> So the changes could be between July 16th to Aug 10th 2014.

You can see Utopic's kernel changelog on
https://launchpad.net/ubuntu/utopic/+source/linux/+changelog

From your message, a kernel change was introduced between:

linux (3.16.0-8.13) utopic; urgency=low
[...]
-- Tim Gardner <email address hidden> Sun, 10 Aug 2014 09:10:51 -0600

and

linux (3.15.0-6.11) utopic; urgency=low
[...]
-- Tim Gardner <email address hidden> Tue, 03 Jun 2014 17:02:49 +0000

Hope this helps