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When I wanted to install Ubuntu 13.04 on my laptop(HP ENVY 17) i got this problem.

enter image description here

Please help me fix it.

answer from sudo gdisk -l /dev/sda : GPT fdisk (gdisk) version 0.8.5

Partition table scan: MBR: protective BSD: not present APM: not present GPT: present

Found valid GPT with protective MBR; using GPT. Disk /dev/sda: 1953525168 sectors, 931.5 GiB Logical sector size: 512 bytes Disk identifier (GUID): 58F18688-CA8F-4E96-AC22-95B762F30F18 Partition table holds up to 128 entries First usable sector is 34, last usable sector is 1953525134 Partitions will be aligned on 2048-sector boundaries Total free space is 3437 sectors (1.7 MiB)

Number Start (sector) End (sector) Size Code Name 1 2048 821247 400.0 MiB 2700 Basic data partition 2 821248 1353727 260.0 MiB EF00 EFI system partition 3 1353728 1615871 128.0 MiB 0C01 Microsoft reserved part 4 1615872 1895444479 903.0 GiB 0700 Basic data partition 5 1895444480 1953523711 27.7 GiB 0700 Basic data partition

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You are mixing up your sda and sdb. According to the picture, sda5 is an ntfs windows recovery partition and it is sdb5 that the installer is complaining about. How did you create that partition, and you need to have gdisk list sdb, not sda. –  psusi Sep 17 '13 at 19:15
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1 Answer

First, I recommend you read this page for background on the problem.

Second, you need to use a partitioning tool that enables you to view and specify partition start points to the sector, rather than rounded (2MiB or 12.7GiB or whatnot). I'm not sure if the Ubuntu installer can do this, offhand. You may need to quit from the installer and use a tool like gdisk, which comes with Linux emergency CDs like System Rescue CD. Alternatively, most tools align partitions properly by default. I thought that the Ubuntu installer did this, but either it's got a bug or you prepared your partitions using some other tool. If the latter, you could simply delete the partition and re-create it with the Ubuntu installer to fix the problem.

If you need more help, I recommend you boot an emergency disc and show us the output of one of the following two commands:

sudo gdisk -l /dev/sda
sudo parted /dev/sda unit s print
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