You don't mention if WiFi was also failing for you.  It is for me.  Does your workaround solve that as well?

Sent from my iPhone

> On Jun 3, 2015, at 4:41 PM, Dr JD Wallach <email address hidden> wrote:
> 
> Hi,
> I have found a workaround for this bug: 
> Start the machine from scratch with all the USB devices plugged in.
> Wait for the Grub menu to show on the screen.
> Using the keyboard select Ubuntu as the operating system to load.
> Immediately after selecting the Ubuntu OS, disconnect the USB mouse (be
> it direct USB plug-in or remote).
> When the Ubuntu login screen comes up it will be possible to use the
> keyboard to enter the user-name and the password.
> Once the Ubuntu environment is established, reconnect the USB mouse.,
> and use it 
> normally.
> Problem solved, although a bit annoying.
> Hope this helps.
> 
> -- 
>  Dr Joseph D. Wallach
>  <email address hidden>
> 
>> On Fri, May 29, 2015, at 12:44 PM, Steve Cohen wrote:
>> What, please, is the status of this bug?  Is there a fix or candidate
>> fix in any newer version of the kernel?
>> 
>> Since I signed on to this bug in early April, I have been looking for
>> some resolution to it.  For awhile I was checking each new kernel
>> release to see if the bug was fixed.   I have downgraded to 3.13.0-46,
>> the last version that works with my computer.  The later releases can
>> not even be installed by the auto-installer.
>> 
>> -- 
>> You received this bug notification because you are subscribed to the bug
>> report.
>> https://bugs.launchpad.net/bugs/1440174
>> 
>> Title:
>>  Keyboard and Mouse don't work with latest Kernel
>> 
>> Status in linux package in Ubuntu:
>>  Incomplete
>> 
>> Bug description:
>>  1)
>>  Description:    Ubuntu 14.04.2 LTS
>>  Release:        14.04
>> 
>>  2) Linux / The kernel
>> 
>>  3) I expected my usb devices to work on the login page
>> 
>>  4) They don't work :)
>> 
>>  ...
>> 
>>  Upon the upgrade to kernel 3.13.0-48-generic my USB devices don't
>>  work, so when I did a normal launch of my computer, I could not sign
>>  into it since my usb devices were not working.
>> 
>>  I was able to sign and and use my computer as normal when I revert to
>>  kernel 3.13.0-46-generic.
>> 
>>  ProblemType: Bug
>>  DistroRelease: Ubuntu 14.04
>>  Package: linux-image-3.13.0-46-generic 3.13.0-46.79
>>  ProcVersionSignature: Ubuntu 3.13.0-46.79-generic 3.13.11-ckt15
>>  Uname: Linux 3.13.0-46-generic x86_64
>>  ApportVersion: 2.14.1-0ubuntu3.8
>>  Architecture: amd64
>>  CurrentDesktop: Unity
>>  Date: Fri Apr  3 13:06:36 2015
>>  HibernationDevice: RESUME=UUID=ae54d2d5-4931-4fcc-8996-aa3adf03cbb6
>>  InstallationDate: Installed on 2015-01-01 (92 days ago)
>>  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64
>>  (20140722.2)
>>  MachineType: Dell Inc. Inspiron 3847
>>  ProcFB: 0 inteldrmfb
>>  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-46-generic
>>  root=UUID=32967a77-1e86-4f47-abfd-a3b98a6e9af6 ro quiet splash
>>  vt.handoff=7
>>  RelatedPackageVersions:
>>   linux-restricted-modules-3.13.0-46-generic N/A
>>   linux-backports-modules-3.13.0-46-generic  N/A
>>   linux-firmware                             1.127.11
>>  RfKill:
>>   0: phy0: Wireless LAN
>>       Soft blocked: no
>>       Hard blocked: no
>>  SourcePackage: linux
>>  UpgradeStatus: No upgrade log present (probably fresh install)
>>  dmi.bios.date: 04/03/2014
>>  dmi.bios.vendor: Dell Inc.
>>  dmi.bios.version: A04
>>  dmi.board.name: 088DT1
>>  dmi.board.vendor: Dell Inc.
>>  dmi.board.version: A01
>>  dmi.chassis.type: 3
>>  dmi.chassis.vendor: Dell Inc.
>>  dmi.modalias:
>>  dmi:bvnDellInc.:bvrA04:bd04/03/2014:svnDellInc.:pnInspiron3847:pvr:rvnDellInc.:rn088DT1:rvrA01:cvnDellInc.:ct3:cvr:
>>  dmi.product.name: Inspiron 3847
>>  dmi.sys.vendor: Dell Inc.
>> 
>> To manage notifications about this bug go to:
>> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1440174/+subscriptions
> 
> -- 
> http://www.fastmail.com - mmm... Fastmail...
> 
> -- 
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1440174
> 
> Title:
>  Keyboard and Mouse don't work with latest Kernel
> 
> Status in linux package in Ubuntu:
>  Incomplete
> 
> Bug description:
>  1)
>  Description:    Ubuntu 14.04.2 LTS
>  Release:    14.04
> 
>  2) Linux / The kernel
> 
>  3) I expected my usb devices to work on the login page
> 
>  4) They don't work :)
> 
>  ...
> 
>  Upon the upgrade to kernel 3.13.0-48-generic my USB devices don't
>  work, so when I did a normal launch of my computer, I could not sign
>  into it since my usb devices were not working.
> 
>  I was able to sign and and use my computer as normal when I revert to
>  kernel 3.13.0-46-generic.
> 
>  ProblemType: Bug
>  DistroRelease: Ubuntu 14.04
>  Package: linux-image-3.13.0-46-generic 3.13.0-46.79
>  ProcVersionSignature: Ubuntu 3.13.0-46.79-generic 3.13.11-ckt15
>  Uname: Linux 3.13.0-46-generic x86_64
>  ApportVersion: 2.14.1-0ubuntu3.8
>  Architecture: amd64
>  CurrentDesktop: Unity
>  Date: Fri Apr  3 13:06:36 2015
>  HibernationDevice: RESUME=UUID=ae54d2d5-4931-4fcc-8996-aa3adf03cbb6
>  InstallationDate: Installed on 2015-01-01 (92 days ago)
>  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
>  MachineType: Dell Inc. Inspiron 3847
>  ProcFB: 0 inteldrmfb
>  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-46-generic root=UUID=32967a77-1e86-4f47-abfd-a3b98a6e9af6 ro quiet splash vt.handoff=7
>  RelatedPackageVersions:
>   linux-restricted-modules-3.13.0-46-generic N/A
>   linux-backports-modules-3.13.0-46-generic  N/A
>   linux-firmware                             1.127.11
>  RfKill:
>   0: phy0: Wireless LAN
>       Soft blocked: no
>       Hard blocked: no
>  SourcePackage: linux
>  UpgradeStatus: No upgrade log present (probably fresh install)
>  dmi.bios.date: 04/03/2014
>  dmi.bios.vendor: Dell Inc.
>  dmi.bios.version: A04
>  dmi.board.name: 088DT1
>  dmi.board.vendor: Dell Inc.
>  dmi.board.version: A01
>  dmi.chassis.type: 3
>  dmi.chassis.vendor: Dell Inc.
>  dmi.modalias: dmi:bvnDellInc.:bvrA04:bd04/03/2014:svnDellInc.:pnInspiron3847:pvr:rvnDellInc.:rn088DT1:rvrA01:cvnDellInc.:ct3:cvr:
>  dmi.product.name: Inspiron 3847
>  dmi.sys.vendor: Dell Inc.
> 
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1440174/+subscriptions