[mythtv-users] WOL - was Backend powered off/shutdown unexpectedly!

[Mike Perkins]

On 30/01/14 16:25, BobW wrote:
> On 1/30/2014 5:58, Simon Fisher wrote:
>> Some other WOL anomalies I experience which you might find useful to know about
>>
>> One of my machines will respond to a WOL unless it's had mains power removed since being shutdown. That is with the
>> machine running I can issue a shutdown and later send a WOL and it will awaken and boot. If the machine is disconnected
>> from the mains power and reconnected it won't respond to a WOL but needs physical press button to boot.
>
> Sounds like you need to change the default power loss/restore option to
> start up the system. Then it should fall back under WOL and automatic
> shutdown / restart alarms.
>
> I wish I could find a list of motherboards that work well with WOL and
> scheduled startup/shutdown. I have two 5+yr old MBs that work great, but
> the new MB I just bought is a total loss.
>
There's the other old chestnut which bit me recently - if this is a system which 
has been around for a while then check your CMOS battery! It may be that the 
power was off long enough to lose the BIOS settings. Now, you might get a 
warning when rebooting, either in the BIOS or in dmesg but that's not guaranteed.

Most CMOS batteries don't have dates on them so one can only guess how old they 
are and what the charge state is. Certainly worth a check unless your board is 
brand new.

-- 

Mike Perkins