Bug#637284: Can't install wheezy on a 2011 iMac

[Mike Hore <mike_hore@aapt.net.au>]

Package: wnpp
Version:

Details:
I used the Wheezy weekly build netinst.
Installation proceeded normally, but on attempting to boot into the new 
system, after a number of scrolling lines, the screen started showing 
bands of colour and there was no further progress.
I attempted to boot into rescue mode, but got the same result.

I suspect that the kernel 2.6.39-2 isn't compatible with the new AMD 
graphics card used by these iMacs.

The hardware:

Hardware Overview:

  Model Name:	iMac
  Model Identifier:	iMac12,1
  Processor Name:	Intel Core i5
  Processor Speed:	2.5 GHz
  Number Of Processors:	1
  Total Number Of Cores:	4
  L2 Cache (per core):	256 KB
  L3 Cache:	6 MB
  Memory:	4 GB
  Boot ROM Version:	IM121.0047.B00
  SMC Version (system):	1.71f21
  Serial Number (system):	C02FN6N9DHJF
  Hardware UUID:	0D156747-A0C6-5AC8-B540-494834088A82

Graphics:

AMD Radeon HD 6750M:

  Chipset Model:	AMD Radeon HD 6750M
  Type:	GPU
  Bus:	PCIe
  PCIe Lane Width:	x16
  VRAM (Total):	512 MB
  Vendor:	ATI (0x1002)
  Device ID:	0x6741
  Revision ID:	0x0000
  ROM Revision:	113-C2950H-136
  EFI Driver Version:	01.00.512

Cheers,  Mike.

---------------------------------------------------------------
          Mike Hore        mike_hore@aapt.net.au
---------------------------------------------------------------