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[Po-Hsu Lin <po-hsu.lin@xxxxxxxxxxxxx>]

Also affects 201305-13641
This system will enter the low-graphic mode when booting with 12.04.4 USB
Console (Ctrl+Alt+F1) works fine.

14.04 Trusty dailylive works fine on this system too.

00:01.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Richland [Radeon HD 8610G] [1002:990f]
01:00.0 Display controller [0380]: Advanced Micro Devices, Inc. [AMD/ATI] Sun XT [Radeon HD 8670A] [1002:6660]

Some error message could be found in dmesg:
[   21.267329] [drm] radeon: irq initialized.
[   21.287395] [drm] ring test on 0 succeeded in 1 usecs
[   21.287404] [drm] ring test on 1 succeeded in 1 usecs
[   21.287410] [drm] ring test on 2 succeeded in 1 usecs
[   21.287474] [drm] ring test on 3 succeeded in 2 usecs
[   21.287484] [drm] ring test on 4 succeeded in 1 usecs
[   21.289263] [drm] ib test on ring 0 succeeded in 0 usecs
[   21.289347] [drm] ib test on ring 1 succeeded in 0 usecs
[   21.289536] [drm] ib test on ring 2 succeeded in 0 usecs
[   21.289632] [drm] ib test on ring 3 succeeded in 0 usecs
[   21.289736] [drm] ib test on ring 4 succeeded in 1 usecs
[   21.290020] [drm] Radeon Display Connectors
[   21.290029] [drm] Internal thermal controller without fan control
[   21.290114] [drm] radeon: power management initialized
[   21.290120] radeon 0000:01:00.0: No connectors reported connected with modes
[   21.290123] [drm] Cannot find any crtc or sizes - going 1024x768
[   21.292543] [drm] fb mappable at 0xE1150000
[   21.292544] [drm] vram apper at 0xE0000000
[   21.292546] [drm] size 3145728
[   21.292547] [drm] fb depth is 24
[   21.292548] [drm]    pitch is 4096
[   21.292795] radeon 0000:01:00.0: fb1: radeondrmfb frame buffer device
[   21.293009] [drm:radeon_acpi_init] *ERROR* Cannot find a backlight controller
[   21.293079] [drm] Initialized radeon 2.34.0 20080528 for 0000:01:00.0 on minor 1

** Attachment added: "dmesg-201305-13641.txt"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1290745/+attachment/4027775/+files/dmesg.txt

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https://bugs.launchpad.net/bugs/1290745

Title:
  [Radeon HD 8670A][1002:6660] Unable to load into live desktop after
  clicked "Try Ubuntu"  on 12.04.4 bootable usb drive

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  
  Failed to load into live desktop after clicked the "Try Ubuntu" button on welcome screen.

  Expected:
  Log into live desktop

  Actual result:
  Following prompted window, trying to run low-graphic mode still not able to load the desktop, will fallback to console.
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version k3.11.0-15-generic.
  ApportVersion: 2.0.1-0ubuntu17.6
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 1: PCH [HDA Intel PCH], device 0: ALC292 Analog [ALC292 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ubuntu     3516 F.... pulseaudio
   /dev/snd/controlC1:  ubuntu     3516 F.... pulseaudio
  CRDA: Error: [Errno 2] No such file or directory
  Card0.Amixer.info:
   Card hw:0 'MID'/'HDA Intel MID at 0xf7d34000 irq 48'
     Mixer name	: 'Intel Haswell HDMI'
     Components	: 'HDA:80862807,80860101,00100000'
     Controls      : 21
     Simple ctrls  : 3
  Card1.Amixer.info:
   Card hw:1 'PCH'/'HDA Intel PCH at 0xf7d30000 irq 49'
     Mixer name	: 'Realtek ALC292'
     Components	: 'HDA:10ec0292,102805bd,00100001'
     Controls      : 28
     Simple ctrls  : 13
  CasperVersion: 1.315.1
  DistroRelease: Ubuntu 12.04
  LiveMediaBuild: Ubuntu 12.04.4 LTS "Precise Pangolin" - Release amd64 (20140204)
  MachineType: Dell Inc. Latitude E6440
  MarkForUpload: True
  Package: linux (not installed)
  ProcEnviron:
   TERM=linux
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB:
   0 inteldrmfb
   1 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/username.seed boot=casper quiet splash --
  ProcVersionSignature: Ubuntu 3.11.0-15.25~precise1-generic 3.11.10
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-15-generic N/A
   linux-backports-modules-3.11.0-15-generic  N/A
   linux-firmware                             1.79.9
  Tags:  precise
  Uname: Linux 3.11.0-15-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  dmi.bios.date: 07/03/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: X23
  dmi.board.name: 02P3T1
  dmi.board.vendor: Dell Inc.
  dmi.board.version: X03
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrX23:bd07/03/2013:svnDellInc.:pnLatitudeE6440:pvr01:rvnDellInc.:rn02P3T1:rvrX03:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E6440
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.
  --- 
  ApportVersion: 2.0.1-0ubuntu17.6
  Architecture: amd64
  CasperVersion: 1.315.1
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  DistUpgraded: Fresh install
  DistroCodename: precise
  DistroRelease: Ubuntu 12.04
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes, even including gdb or git bisection work if needed
  GraphicsCard:
   Intel Corporation 4th Gen Core Processor Integrated Graphics Controller [8086:0416] (rev 06) (prog-if 00 [VGA controller])
     Subsystem: Dell Device [1028:05bd]
     Subsystem: Dell Device [1028:05bd]
  LiveMediaBuild: Ubuntu 12.04.4 LTS "Precise Pangolin" - Release amd64 (20140204)
  MachineType: Dell Inc. Latitude E6440
  MarkForUpload: True
  Package: xorg 1:7.6+12ubuntu2
  PackageArchitecture: amd64
  ProcEnviron:
   TERM=linux
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/username.seed boot=casper quiet splash --
  ProcVersionSignature: Ubuntu 3.11.0-15.25~precise1-generic 3.11.10
  Tags:  precise ubuntu referred-by-support
  Uname: Linux 3.11.0-15-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  dmi.bios.date: 07/03/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: X23
  dmi.board.name: 02P3T1
  dmi.board.vendor: Dell Inc.
  dmi.board.version: X03
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrX23:bd07/03/2013:svnDellInc.:pnLatitudeE6440:pvr01:rvnDellInc.:rn02P3T1:rvrX03:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E6440
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.
  version.compiz: compiz 1:0.9.7.12-0ubuntu3
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.46-1ubuntu0.0.0.1
  version.libgl1-mesa-dri: libgl1-mesa-dri N/A
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx N/A
  version.xserver-xorg-core: xserver-xorg-core N/A
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
  version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A

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