Public bug reported:

I was running Kubuntu 12.04 on an HP Elitebook 8540p with 8GB RAM and
Nvidia GPU This was installed on a external Western Digital My Passport
500GB No issues were encountered and the system operated normally

Overtime, I have to assume as upgrades where installed, the system began
to develop problems.

First is was: ata_id[XXX] HDIO_GET_IDENTITY failed for '/dev/sdb':
Invalid argument Then later I got: intel ipc turbo graphics disabled

After hours of reading forums and trying different fixes I managed to
screw up the system to where a reinstall was necessary.

My questions are why does the system operate perfectly from the live CD and not 
the installed system?
Why is there now the need for the turbo graphics work around?
Why does the acpi=off grub parameter need to there?
Why does the current installer not pick up these issues?

** Affects: ubuntu
     Importance: Undecided
         Status: New

** Attachment added: "12.04.3-Install"
   
https://bugs.launchpad.net/bugs/1235709/+attachment/3861320/+files/12.04.3-Install

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https://bugs.launchpad.net/bugs/1235709

Title:
  Kubuntu 12.04.3 Installation Problems

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