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My laptop is a toshiba satellite C55.

Here is the url for the boot-repair

http://paste.ubuntu.com/13089017/

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  • Do you mean that you removed windows during the Ubuntu installation? Or afterwards? – ph0t0nix Nov 3 '15 at 9:35
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If you want to keep only Ubuntu (and no Windows), then the best option is to do a clean install and during the install wipe (format) the entire hard disk..

That way you have a clean system and rest of the things will work fine

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  • Varun, thank you for replying. I did the clean install and wiped the entire disk. I used the boot-repair, and when I rebooted I made sure the boot order was correct (Hard-disk then usb). Without the usb, I was able to boot but then it went to a black screen and i get the error "ACPI PCC probe failed".Disk check ensures and then i am dropped to root terminal screen. – razgriz Nov 3 '15 at 4:22
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This problem is quite tricky to solve from what I've seen. If you changed your display driver(from X.Org Nouveau) to NVIDIA you will need to do the following:

  1. Use the X.Org Nouveau display driver (by purging the Nvidia binary drivers as described in other answers). The drawback is that it will impact the graphics performance which is better with an official Nvidia driver.
  2. Install the Nvidia driver and boot with the 'nomodeset' flag. To do this, configure Grub as described in the answer to this question.

Source

Otherwise, it could be a BIOS setting, as suggested here.

Then again, a clean install of Ubuntu is supposed to work.

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