I have tried several times to install Ubuntu 12.04 on this HP Pavillon dv 4000 laptop, and each time the installation program stops silently in the initial phase, that is while the ubuntu logo and the moving dots are still on the screen.
Previously I installed Ubuntu 11 og this laptop. That installation was successful apart from the wireless network that did not work. When I tried to upgrade from Ubuntu 11 to 12.04, the laptop did not reboot properly after installation. In the boot process a message came up that there was not a proper firmware for the wireless and a website I could go to for finding the proper driver. However, since I was not able to make Ubuntu continue the boot process without that driver, I found no way of installing that driver. Hope this bug can be fixed as soon as possible. (As concerning the version it was the current version on your webside Friday that I downloaded that day.) I also would like to add that I have extended the RAM on that laptop, so the reason for the silent stop of the installation should not be lack of memory.
Thank you for taking the time to report this bug and helping to make Ubuntu better. We are sorry that we do not always have the capacity to look at all reported bugs in a timely manner. There have been many changes in Ubuntu since that time you reported the bug and your problem may have been fixed with some of the updates. It would help us a lot if you could test it on a currently supported Ubuntu version. If you test it and it is still an issue, kindly upload the updated logs by running only once:
apport-collect 995487
and any other logs that are relevant for this particular issue.