Date: Sat, 05 Mar 2005 13:25:02 -0500 (EST)
From: vcjones@networkingunlimited.com (Vincent C Jones)
Subject: APM vs. USB BlueTooth in 2.6.11
To: linux-kernel@vger.kernel.org
Message-id: <20050305182502.53B21224E6@X31.networkingunlimited.com>
Organization: Networking Unlimited, Inc.
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SuSE 9.2 on IBM ThinkPad X31 (2884-JUU), 2.6.11 kernel. Great having a
notebook where everything just works.

Bluetooth (hci_usb) works fine, but after suspend/resume cycle using
APM the BlueTooth interface dies (LED goes out) and I can't get it back
by unloading/reloading modules. However, if I compile the bluetooth and
hci_usb into the kernel rather than as modules, suspend resume seems to
work fine. (APM is configured to stop/start Bluetooth service around a
suspend/resume cycle).

Any idea why?

FWIW: I still use APM because ACPI suspend to RAM consumes 1250
mW/hour while APM suspend to RAM is only 360 mW/hour, not worth the
fancy features, but that is another topic. Windows XP ACPI suspend
to RAM consumes 525 mW/hour. 

Any suggestions on how to reduce power consumption when suspended
using ACPI?

-- 
Dr. Vincent C. Jones, PE              Expert advice and a helping hand
Computer Network Consultant           for those who want to manage and
Networking Unlimited, Inc.            control their networking destiny
Phone: +1 201 568-7810
14 Dogwood Lane, Tenafly, NJ 07670
VCJones@NetworkingUnlimited.com     http://www.networkingunlimited.com
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