ubuntu installer does not detect installed windows 8

[Teo]

Usually, when you boot an ubuntu installation disk, it detects OSes already installed on the system, and gives you the option whether to delete everything and install Ubuntu, or install it alongside the existing OS in a dual boot mode, or manually manage partitions.

However, if there is Windows 8 installed, it doesn't detect it and does not offer the option to install Ubuntu alongside the existing Windows 8. The only 2 options are to delete everything and install ubuntu, or "something else" (i.e. manually edit partitions).

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: debian-installer (not installed)
ProcVersionSignature: Ubuntu 3.8.0-31.46-generic 3.8.13.8
Uname: Linux 3.8.0-31-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.9.2-0ubuntu8.4
Architecture: i386
Date: Thu Oct 10 22:59:14 2013
DeviceMapperTables: No devices found
DmraidDevices: no raid disks
DmraidSets: no raid disks
InstallationDate: Installed on 2010-06-23 (1205 days ago)
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
MachineType: ASUSTeK Computer Inc. M51Sn
MarkForUpload: True
MemoryUsage:
 total used free shared buffers cached
 Mem: 3103000 2900444 202556 0 325748 243600
 -/+ buffers/cache: 2331096 771904
 Swap: 2155516 571416 1584100
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-31-generic root=UUID=173acbf5-26a0-49e3-8d2b-f1c142582cbf ro quiet splash
SourcePackage: debian-installer
UpgradeStatus: Upgraded to raring on 2013-08-10 (61 days ago)
dmi.bios.date: 12/24/2007
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 303
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: M51Sn
dmi.board.vendor: ASUSTeK Computer Inc.
dmi.board.version: 1.0
dmi.chassis.asset.tag: ATN12345678901234567
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer Inc.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr303:bd12/24/2007:svnASUSTeKComputerInc.:pnM51Sn:pvr1.0:rvnASUSTeKComputerInc.:rnM51Sn:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
dmi.product.name: M51Sn
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK Computer Inc.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Luis Rocha (luislarr)]

Same problem here, I jyst tryed to installa 14.04 this weekend and it didn't recognized windows, this is the info of my laptop:

Model: K45VD
Brand: Asus
OS: Windows 8.1

[David Jolley (y-ubuntu-d)]

Same problem with 14.04 here too, on a UEFI HP laptop, booting onto the DVD installer, no other OS detected. Dropping back to one of the text-based VTs (Ctrl-Alt-F1) and running fdisk in that terminal I can see the windows partition, there's just something stopping the installer acknowledging it's existence.