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[mezzbest <1437386@xxxxxxxxxxxxxxxxxx>]

Christopher:

I still owe the filing of a bug via  'ubuntu-bug linux'. However, there seem to be at least two possilbly related other bugs:
1) the blacking out of the screen while starting the live cd:  *patience* seems the "solution" at this moment in time (as detailed below); 
2) a system crash shutting down from the live cd; 
3) system freeze when trying to detect screens via System Settings > Displays > Detect Displays. 

For the present bug, i.e. booting with the 14.04.02 amd64 LTS image
(from February 18 (?)), I could observe the following (written here
mainly for the sake of owners of a Lenovo w541). After booting with the
live cd 14.04.2 LTS amd64 and choosing to try ubuntu, the screen shows
ubuntu and the four dots in red and white progressing, then, later, the
screen goes blank, then the mouse coursor appears, the screen goes blank
again, and finally the system is up and running and one can go through
the installation process (which I've completed successfully twice).
manadi, Arno or Salvatore, can you confirm?

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https://bugs.launchpad.net/bugs/1437386

Title:
  Unable to boot LenovoThinkpad W541

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I tried to boot my Lenovo Thinkpad W541 using a bootable USB(having
  Ubuntu 14.04 image).

  I could see the welcome screen where I can choose to try or install
  Ubuntu. Choosing either one causes a freeze.

  Initial boot screen shows the following error (which maybe the
  reason?):

  "mmc0 unknown controller version(3), You may experience problems"

  I cannot run "apport-collect" since this problem stops me from booting.
  --- 
  ApportVersion: 2.12.5-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  ubuntu     2803 F.... pulseaudio
   /dev/snd/controlC0:  ubuntu     2803 F.... pulseaudio
  CasperVersion: 1.336ubuntu1
  DistroRelease: Ubuntu 13.10
  LiveMediaBuild: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MachineType: LENOVO 20EGS01600
  MarkForUpload: True
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: file=/cdrom/preseed/username.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
  ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-12-generic N/A
   linux-backports-modules-3.11.0-12-generic  N/A
   linux-firmware                             1.116
  Tags:  saucy
  Uname: Linux 3.11.0-12-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  dmi.bios.date: 02/26/2015
  dmi.bios.vendor: LENOVO
  dmi.bios.version: GNET72WW (2.20 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20EGS01600
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Defined
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrGNET72WW(2.20):bd02/26/2015:svnLENOVO:pn20EGS01600:pvrThinkPadW541:rvnLENOVO:rn20EGS01600:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 20EGS01600
  dmi.product.version: ThinkPad W541
  dmi.sys.vendor: LENOVO

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