[Bug 1318388] [NEW] Installer LiveUSB wont boot with default boot args (Acer C720)

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Public bug reported:

On an Acer C720 Chromebook the Ubuntu installer usb medium will not boot
with default args.

The screen goes black with a flashing underline cursor in the top left
of the screen, no other output is displayed even with "quiet" and
"splash" removed from the boot args.

I can get round this and make the installer boot by adding "mem=1500m"
to the boot args and once installed it is no longer a problem and the
mem= entry is not required.

The Acer C720 Chromebook is not a standard laptop, it has coreboot
instead of a bios and in order to install anything other than chromeos I
had to enable SeaBIOS legacy support inside coreboot.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: installation-report (not installed)
ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9
Uname: Linux 3.13.0-24-generic i686
ApportVersion: 2.14.1-0ubuntu3
Architecture: i386
CurrentDesktop: Unity
Date: Sun May 11 18:50:43 2014
InstallationDate: Installed on 2014-05-11 (0 days ago)
InstallationMedia: It
SourcePackage: installation-report
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: installation-report (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 trusty

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https://bugs.launchpad.net/bugs/1318388

Title:
  Installer LiveUSB wont boot with default boot args (Acer C720)

Status in “installation-report” package in Ubuntu:
  New

Bug description:
  On an Acer C720 Chromebook the Ubuntu installer usb medium will not
  boot with default args.

  The screen goes black with a flashing underline cursor in the top left
  of the screen, no other output is displayed even with "quiet" and
  "splash" removed from the boot args.

  I can get round this and make the installer boot by adding "mem=1500m"
  to the boot args and once installed it is no longer a problem and the
  mem= entry is not required.

  The Acer C720 Chromebook is not a standard laptop, it has coreboot
  instead of a bios and in order to install anything other than chromeos
  I had to enable SeaBIOS legacy support inside coreboot.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: installation-report (not installed)
  ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9
  Uname: Linux 3.13.0-24-generic i686
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: i386
  CurrentDesktop: Unity
  Date: Sun May 11 18:50:43 2014
  InstallationDate: Installed on 2014-05-11 (0 days ago)
  InstallationMedia: It
  SourcePackage: installation-report
  UpgradeStatus: No upgrade log present (probably fresh install)

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