Nick's PPA did sovled my low-graphic problem on a  HP laptop (I7/6770M)
for ubuntu 12.10/amd64

However there are 2 steps must to be taken, or-else still low-graphic(
segmentation fault shown in Xorg.0.log):

1. run "sudo dpkg-reconfigure Xorg" before reboot

2. when linux kernel is 3.7 or higher, another patch must be apply to Nick's 
fglrx-updates_9.010-0ubuntu1~andrik7_amd64.deb
for deb file usr/src/fglrx-updates-9.010/firegl_public.c, add follow 4 lines to 
the head of file

// VM_RESERVED is deleted in 3.7 or higher kernels.
#ifndef VM_RESERVED
#define VM_RESERVED (VM_DONTEXPAND | VM_DONTDUMP)
#endif

then rebuild the deb and install it, which would resolved the error msg

-- 
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which is subscribed to the bug report.
https://bugs.launchpad.net/bugs/1068404

Title:
  Low graphics mode in Hybrid ATI/Intel GPU systems after fglrx upgrade

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https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/1068404/+subscriptions

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