This is fixed for me with the 2.6.31-14.46 kernel
from http://changelogs.ubuntu.com/changelogs/pool/main/l/linux/linux_2.6.31-14.46/changelog :
[ Upstream Kernel Changes ]
* ACPI: Clarify resource conflict message * ACPI: fix Compaq Evo N800c (Pentium 4m) boot hang regression
This is fixed for me with the 2.6.31-14.46 kernel
from http:// changelogs. ubuntu. com/changelogs/ pool/main/ l/linux/ linux_2. 6.31-14. 46/changelog :
[ Upstream Kernel Changes ]
* ACPI: Clarify resource conflict message
* ACPI: fix Compaq Evo N800c (Pentium 4m) boot hang regression