Public bug reported:
Note: I'm attaching a video below demonstrating the issue. In it I'm
reproducing the problem with the amd64 ISO of 15.04.
Steps to reproduce:
1. Have a (virtual) machine with a clean 10 GB hard disk and 8 GB of RAM.
2. Start the installer, select "Erase disk and install Ubuntu", click "Install
now".
What happens:
A "Do you want to return to the partitioner?" window pops up, saying "Some of
the partitions you created are too small. Please make the following partitions
at least this large:
/ 3.5 GB
If you do not go back to the partitioner and increase the size of these
partitions, the installation may fail."
Selecting Continue then goes on to an installation which fails due to
lack of space as promised. This is because the installer has partitioned
the disk with a 8+ GB swap partition, and only what remains of the 10 GB
after that allocated to /.
What I expect to happen:
I know this is a tricky corner case, but I think there are better ways to deal
with it than exhibited by the installer above. Here are some alternative
suggestions I came up with:
1) change the way the disk space requirement is calculated for the
"Preparing to install" view: make it require at least the minimum "/"
size + expected swap size, thus notifying the user beforehand if the
requirement is not met. (As you see in the video, currently it has the
green checkmark even when the installer is about to fail predictably.)
2) have the installer select a partitioning scheme where "/" is the
minimum required and allocate whatever remains for swap; warn the user
that swap will be too small to do hibernation.
3) at the very least, have the "Do you want to return to the
partitioner?" window describe the situation better. It was the biggest
source of confusion for me because the wording implied I had partitioned
the disk (which I hadn't done) and prompting me to "return to the
partitioner" where I hadn't been to.
** Affects: debian-installer (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "15.04 installer demonstrating the issue of non-working
automatic partitioning"
https://bugs.launchpad.net/bugs/1451902/+attachment/4391503/+files/out.ogv
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https://bugs.launchpad.net/bugs/1451902
Title:
Non-working partitioning scheme selected when a small hard drive is
coupled with relatively large RAM
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