Ubiquity is not launching in "Try Ubuntu" session option

[Sergio Benjamim]

Ubiquity is not launching its GUI in "Try Ubuntu" session option, but it seems that it is running in the background. It is possible run "sudo killall Ubiquity". Steps to Reproduce:

- Run Ubuntu Saucy 64 bits (USB flash drive) in a UEFI system;
- Choose "Try Ubuntu" session option;
- Run Ubiquity from the Unity launcher;
- Nothing happens, but it is in the system, it is possible see the process in the System Monitor;
- Open a terminal, run ubiquity, and got message: "Ubiquity is already running!"
- Run "sudo killall Ubiquity" and the process finish, without any ubiquity GUI.

Description: Ubuntu Saucy Salamander (development branch)
Release: 13.10
Linux ubuntu 3.11.0-7-generic #14-Ubuntu SMP Mon Sep 16 18:37:27 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

ubiquity:
  Installed: 2.15.18
  Candidate: 2.15.18
  Version table:
 *** 2.15.18 0
        500 http://archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
        100 /var/lib/dpkg/status

unity:
  Installed: 7.1.0+13.10.20130903.1-0ubuntu1
  Candidate: 7.1.0+13.10.20130903.1-0ubuntu1
  Version table:
 *** 7.1.0+13.10.20130903.1-0ubuntu1 0
        500 http://archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
        100 /var/lib/dpkg/status

Hardware:

Intel(R) Core(TM) i7-4700HQ CPU @ 2.40GHz

00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor DRAM Controller (rev 06)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor PCI Express x16 Controller (rev 06)
00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06)
00:03.0 Audio device: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller (rev 06)
00:14.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB xHCI (rev 04)
00:16.0 Communication controller: Intel Corporation 8 Series/C220 Series Chipset Family MEI Controller #1 (rev 04)
00:1a.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #2 (rev 04)
00:1b.0 Audio device: Intel Corporation 8 Series/C220 Series Chipset High Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #1 (rev d4)
00:1c.2 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #3 (rev d4)
00:1c.3 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #4 (rev d4)
00:1d.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation HM86 Express LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation 8 Series/C220 Series Chipset Family 6-port SATA Controller 1 [AHCI mode] (rev 04)
00:1f.3 SMBus: Intel Corporation 8 Series/C220 Series Chipset Family SMBus Controller (rev 04)
01:00.0 3D controller: NVIDIA Corporation GK208M [GeForce GT 740M] (rev a1)
03:00.0 Network controller: Qualcomm Atheros AR9485 Wireless Network Adapter (rev 01)
04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 0c)

    description: Notebook
    product: X750JB (ASUS-NotebookSKU)
    vendor: ASUSTeK COMPUTER INC.
    version: 1.0
    serial: D6N0CV496603257
    width: 64 bits
    capabilities: smbios-2.7 dmi-2.7 vsyscall32
    configuration: boot=normal chassis=notebook family=X sku=ASUS-NotebookSKU uuid=80E6E821-2863-E381-3555-AC220B065291
  *-core
       description: Motherboard
       product: X750JB
       vendor: ASUSTeK COMPUTER INC.
       physical id: 0
       version: 1.0
       serial: BSN12345678901234567
       slot: MIDDLE
     *-firmware
          description: BIOS
          vendor: American Megatrends Inc.
          physical id: 0
          version: X750JB.207
          date: 05/24/2013
          size: 64KiB
          capacity: 4032KiB
          capabilities: pci upgrade shadowing cdboot bootselect socketedrom edd int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int9keyboard int14serial int17printer acpi usb biosbootspecification uefi

  *-display UNCLAIMED
       description: 3D controller
       product: GK208M [GeForce GT 740M]
       vendor: NVIDIA Corporation
       physical id: 0
       bus info: pci@0000:01:00.0
       version: a1
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress cap_list
       configuration: latency=0
       resources: memory:f6000000-f6ffffff memory:e0000000-efffffff memory:f0000000-f1ffffff ioport:e000(size=128) memory:f7000000-f707ffff
  *-display
       description: VGA compatible controller
       product: 4th Gen Core Processor Integrated Graphics Controller
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 06
       width: 64 bits
       clock: 33MHz
       capabilities: msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: irq:46 memory:f7400000-f77fffff memory:d0000000-dfffffff ioport:f000(size=64)

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: ubiquity 2.15.18
ProcVersionSignature: Ubuntu 3.11.0-7.14-generic 3.11.1
Uname: Linux 3.11.0-7-generic x86_64
ApportVersion: 2.12.1-0ubuntu4
Architecture: amd64
CasperVersion: 1.336
Date: Thu Sep 19 13:05:33 2013
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash --
LiveMediaBuild: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130917)
MarkForUpload: True
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

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