[Bug 986149] Re: crash while booting MacBook Pro 6,2 from USB

[Jason Harvey]

Just tried to debug. I set gfxpayload to text, and removed 'quiet' and
'splash'. The result was the exact same.

The last line displayed before the graphics corruption happened was
something with 'fbcon'. Loads a bit too fast to tell.


Also tried to boot the install CD with noapic, nolapic, acpi=off, and permutations of those settings. None of them resulted in a successful boot.

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https://bugs.launchpad.net/bugs/986149

Title:
  crash while booting MacBook Pro 6,2 from USB

Status in “plymouth” package in Ubuntu:
  Confirmed

Bug description:
  reproduce:

  1. Create bootable USB flash drive with "Startup Disk Creator" from image "ubuntu-12.04-beta2-desktop-amd64.iso"
  2. Boot MacBook Pro 6,2 from USB flash drive (hold "Option" while truning on, wait 30 seconds, select drive)
  3. Select "Try Ubuntu without Installing"
  4. Hit "Enter": after a few seconds a distorted screen appears, some pixels are changing rhytmically beween red and green, then nothing happens anymore

  
  remark:

  I tried both a SanDisk Cruzer 2GB and Hama 8GB: same behavior

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