ubiquity does not detect Windows 8(UEFI)

Bug #1079056 reported by Nobuto Murata on 2012-11-15
This bug affects 7 people
Affects Status Importance Assigned to Milestone
os-prober (Debian)
Fix Released
os-prober (Ubuntu)

Bug Description

Ubiquity does not detect Windows 8.
It shows the message:
 "This computer currently has no detected operating systems."

Windows 8 was installed with secure boot on.

$ sudo parted /dev/sda print
Model: ATA HITACHI HTS54503 (scsi)
Disk /dev/sda: 320GB
Sector size (logical/physical): 512B/4096B
Partition Table: gpt

Number Start End Size File system Name Flags
 1 1049kB 316MB 315MB ntfs Basic data partition hidden, diag
 2 316MB 420MB 105MB fat32 EFI system partition boot
 3 420MB 555MB 134MB Microsoft reserved partition msftres
 4 555MB 320GB 320GB ntfs Basic data partition

$ sudo os-prober
<no output>

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: ubiquity 2.12.16
ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
Uname: Linux 3.5.0-17-generic x86_64
ApportVersion: 2.6.1-0ubuntu3
Architecture: amd64
CasperVersion: 1.328
Date: Thu Nov 15 07:16:55 2012
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi.signed file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash --
LiveMediaBuild: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
 PATH=(custom, no user)
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

Nobuto Murata (nobuto) wrote :
Richard Ayres (rayres) wrote :

Thank you for taking the time to report this bug and helping to make Ubuntu better.

This particular bug has already been reported, originally against Ubuntu 11.10, and is a duplicate of bug #978028, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report.

Nobuto Murata (nobuto) wrote :

I have un-duplicated from Bug #978028 because:

Bug #978028 has been marked as Fix Released with os-prober 1.51ubuntu2.

But I had the newer version os-prober 1.56ubuntu1.

Nobuto Murata (nobuto) wrote :

terminal output with set -x in /usr/lib/os-probes/mounted/20microsoft.

/dev/sda5:Ubuntu 12.10 (12.10):Ubuntu:linux is installed after facing this issue with manual partitioning.

affects: ubiquity (Ubuntu) → os-prober (Ubuntu)
Nobuto Murata (nobuto) wrote :

Here is the list of files in the efi partition.
efi partition is mounted by:
 $ sudo mount -o ro /dev/sda2 /mnt

Richard Ayres (rayres) wrote :

After discussion, this is a feature request, not a new bug, duplicate or regression. Please see http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=687921 for further information.

This report will be marked as a wishlist item in due course. Thanks.

Nobuto Murata (nobuto) wrote :


Thank you for the information.

After searching around, this is related to:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=687921 (from you)
http://lists.debian.org/debian-boot/2012/10/msg00185.html (proposed patch for this issue)
Bug #807801 (might be a downstream bug of debian 687921)

For the record, the easiest workaround to me was launching ubiquity with WINOSDATA=true (any non-empty value).
 $ WINOSDATA=true ubiquity
That will detect my /dev/sda4 as Windows 8 (data) and enable the option "Install Ubuntu alongside Windows 8 (data)".

$ sudo WINOSDATA=true os-prober
/dev/sda4:Windows 8 (data):Windows:chain

summary: - ubiquity does not detect Windows 8
+ ubiquity does not detect Windows 8(UEFI)
Changed in os-prober (Debian):
status: Unknown → New
Launchpad Janitor (janitor) wrote :

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

Changed in os-prober (Ubuntu):
status: New → Confirmed
Changed in os-prober (Debian):
status: New → Fix Released
sumith (autosumith) on 2013-09-16
Changed in os-prober (Ubuntu):
status: Confirmed → Fix Released
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