Booting BT3 off battery

I recently got a new laptop (Lenovo T500) and decided to upgrade to BT3.

I've found that I can boot off a CD or thumb drive when plugged into AC, but not while on battery power. Is this typical behavior?

When it fails, I get the Loading /boot/vmlinuz line and the Loading /boot/initrd.gz line. Then the screen goes blank and the system restarts. Over and over.

When booting off of AC power, it takes twice. The system restarts once (like mentioned above) and then boots OK after that.

Any help would be appreciated. Thanks.

KenMz

Have you tried various boot opts? such as maybe acpi=off ?

You could also try disabling ACPI through your BIOS settings to narrow down the issue (conflicted ACPI request from BT or hardware misinterpreting a request).

Thanks for the suggestions guys. acpi=off had effect=none. The Lenovo bios has about a half-dozen power options with a couple dozen total sub-options. I can play around with those to see if I can get some improvement.

One thing I've found is that I can boot when the battery is fully charged, just not when it's worn down a bit.

did you ever find an answer to this?