Comment 8 for bug 431963

Ok, here's some steps to reproduce/debug the issue we are seeing.

1. get latest image from http://cdimage.ubuntu.com/ports/daily-live/current/ and flash it to a SD card following the instructions at https://help.ubuntu.com/community/Installation/FromImgFiles.

2. After booting, Run "Install Ubuntu 9.10" by double clicking on the icon on the desktop. Follow the prompts for time zone and locale. Use the entire drive for install. To switch to ext3, select "Specify partitions manually" and create two partitions (root and swap).

3. Once the system is done installing, reboot. System will startup and hang once it gets into X. To get dmesg output, change the fconfid script by removing "quiet splash" and adding "console=ttymxc0,115200 console=tty0". To get into a console, add "single" to the kernel cmdline to boot into rescue mode.

Booting into rescue mode will give you several options including networking. This way, you can download and install additional tools like bonnie++ to run some benchmarking. YOu can run in this mode reliably for days without failure. It is only when starting X that you will start seeing errors like "end_request: I/O error, dev sda, sector 12859015".