[mythtv-users] Hacking a Hauppauge pvr350 to generate ACPI wakeup?

Mike Perkins mikep at randomtraveller.org.uk
Thu Sep 29 13:32:23 UTC 2011

On 28/09/11 21:40, tortise wrote:
> On 27/09/2011 4:22 a.m., Marc MERLIN wrote:
>> This allows me to wake up via keyboard, or more importantly by sending a
>> small voltage on the serial port RI pin, which I can link to a trigger out
>> on my AV receiver.
> I've also wondered if an old PCI modem card might be used in various
> ways.  Mimicking a "ring in" in many cases can be configured to wake a
> system and is probably very widely supported from what I've seen of
> motherboard BIOS.
> Many of the modem cards have a relay that might also be switched by
> sending modem commands.  The relay outputs can be commandeered to some
> useful purposes, e.g. being the initiating switch to powering all other
> devices.
> The cost of these unwanted cards is also negligible these days.
You don't need a card. Serial ports are still provided on a lot of motherboards, 
even if it is only as a pin-header. All these will have a RI pin and also a DTR 
pin if you want to control anything external.


Mike Perkins

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