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I have been using Ubuntu for a long time, recently I have installed Ubuntu in dual boot, but after installation when restart computer and choose Ubuntu from grub, it stuck on a black screen with blinking cursor. I have tried many solutions, but still no luck. I have tried starting using nomodeset and similar solutions.

Using Live USB start try Ubuntu and uninstall Nvidia driver and then reboot the system, this time I successfully used Ubuntu but problem is that in this situation when I boot into Windows, all the USB ports stop working.

When I used the following method from Ubuntu live CD in Try Ubuntu, I am able to boot Ubuntu installation, but if I switched off the power of the computer and start the computer again, I am facing the same problem, blinking cursor on boot.

# Remove existing drivers
sudo apt-get remove nvidia*
sudo apt-get purge nvidia*

# Housekeeping
sudo apt-get clean
sudo apt-get autoclean

# Handle any errors to due incomplete apt-get operations
sudo dpkg --configure -a
sudo apt-get update
sudo apt-get upgrade

# Remove xorg/X11/XFree86 references to graphics drivers
sudo rm /etc/X11/xorg.conf
sudo apt-get install ubuntu-desktop

# Clean up and unmount everything
exit
sudo umount /mnt/sys
sudo umount /mnt/proc
sudo umount /mnt/dev
sudo umount /mnt
exit

The output of fdisk in Try Ubuntu is displayed below. It is not showing * in front of Linux, why it not showing *?

Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x000b69dd

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *          63   512007614   256003776    7  HPFS/NTFS/exFAT
Partition 1 does not start on physical sector boundary.
/dev/sda2       512008190   609665023    48828417    5  Extended
Partition 2 does not start on physical sector boundary.
/dev/sda3       609665024   976771071   183553024    7  HPFS/NTFS/exFAT

Disk /dev/sdb: 120.0 GB, 120034123776 bytes
255 heads, 63 sectors/track, 14593 cylinders, total 234441648 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000d8748

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            2048    48828415    24413184   83  Linux
/dev/sdb2        48830462    97656831    24413185    5  Extended
/dev/sdb5        48830464    97656831    24413184   82  Linux swap / Solaris

Disk /dev/sdc: 7933 MB, 7933526016 bytes
255 heads, 63 sectors/track, 964 cylinders, total 15495168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x13bb8e7c

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1   *        2048    15495167     7746560    7  HPFS/NTFS/exFAT

Please guide me.

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is there any one who can help me?? –  nabeel Jan 23 at 12:36

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