If you have problems during the boot process, such as the kernel hangs during the boot process, the kernel doesn't recognize peripherals you actually have, or drives are not recognized properly, the first things to check are the boot parameters. They can be found by pressing F1 when booting from the rescue disk.
Often, problems can be solved by removing add-ons and peripherals and then booting again. Internal modems, sound cards, and Plug-n-Play devices are especially problematic.
Tecras and other notebooks, and some non-portables fail to flush the cache when switching on the A20 gate, which is provoked by bzImage kernels but not by zImage kernels. If your computer suffers from this problem, you'll see a message during boot saying A20 gating failed. In this case, you'll have to use the `tecra' boot images.
If you still have problems, please submit a bug report. Send an email to email@example.com. You must include the following as the first lines of the email:
You should also include the following information in your bug report:
In the bug report, describe what the problem is, including the last visible kernel messages in the event of a kernel hang. Describe the steps you performed that put the system into the problem state.