[Bug 1254283] [NEW] Ubiquity miscalculates maximum partition size

[Seppe Stas]

Public bug reported:

When trying to combine 2 partitions during the installation of Ubuntu Gnome, I got the following message:
"Can't have a partition outside the disk!''
Image: https://pbs.twimg.com/media/BZw5plkCMAEoSD8.png:large

This message was stuck in a loop, so I couldn't continue or close the installation.
I combined the partitions by removing one of them, and incresing the size of the other partition to the max size. The second time I tried this, I calculated the maximum size of the new partition, and noticed this was 1MB smaller than the size ubiquity pruposed. 

This bug is probably caused by a rounding error.

Ubuntu release: 13.10
Ubiquity: 2.15.26

** Affects: ubiquity (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: ext4 partition rounding

** Attachment added: "syslog"
   https://bugs.launchpad.net/bugs/1254283/+attachment/3915523/+files/syslog

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https://bugs.launchpad.net/bugs/1254283

Title:
  Ubiquity miscalculates maximum partition size

Status in “ubiquity” package in Ubuntu:
  New

Bug description:
  When trying to combine 2 partitions during the installation of Ubuntu Gnome, I got the following message:
  "Can't have a partition outside the disk!''
  Image: https://pbs.twimg.com/media/BZw5plkCMAEoSD8.png:large

  This message was stuck in a loop, so I couldn't continue or close the installation.
  I combined the partitions by removing one of them, and incresing the size of the other partition to the max size. The second time I tried this, I calculated the maximum size of the new partition, and noticed this was 1MB smaller than the size ubiquity pruposed. 

  This bug is probably caused by a rounding error.

  Ubuntu release: 13.10
  Ubiquity: 2.15.26

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