Comment 8 for bug 77966

ubuntu 9.04 beta : I've got the same problem.
I used manual partitioning, resized a fat32 partition, this gave me 2.1GB free. I created an ext4 partition for / with this 2.1GB partition. No warning at this step about the size of the partition.

At 87%, the installer disappears, leaving only the progress bar opened (87%).
2 processes are still runing and eating up CPU time (see below the first lines of "top")
  PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
  663 root 20 0 0 0 0 R 34.5 0.0 101:46.54 pdflush
 1462 root 20 0 80948 60m 28m R 33.9 6.9 106:58.70 install.py
 3991 root 20 0 73008 30m 6352 S 19.3 3.5 40:13.49 Xorg
 5545 ubuntu 20 0 146m 70m 21m S 5.4 8.0 1:09.58 firefox
 4082 root 20 0 90380 53m 14m S 4.8 6.1 23:25.11 ubiquity
 4077 ubuntu 20 0 35076 25m 9024 S 1.5 2.9 0:29.58 metacity
 5694 ubuntu 20 0 2444 1172 920 R 0.2 0.1 0:00.34 top
  814 root 15 -5 0 0 0 S 0.1 0.0 0:13.11 kjournald2
 4080 ubuntu 20 0 29140 8788 6712 S 0.1 1.0 0:04.00 gnome-settings-
 4911 ubuntu 20 0 16592 5100 3920 S 0.1 0.6 0:20.45 gnome-screensav
    1 root 20 0 3084 684 564 S 0.0 0.1 0:02.63 init
    2 root 15 -5 0 0 0 S 0.0 0.0 0:00.00 kthreadd