Notes and information about EKF CCM-BOOGIE:
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1) CCM-BOOGIE does not start after power is reapplied
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Sometimes the system does not start after power is reapplied to the board. In almost
all cases this is NOT caused by a hardware failure of the board! It is caused because
the board enters S4 or S5 state after power-up (like a "normal" PC), instead of
running state S0.

Sleep states S4 or S5 are indicated by front panel LED PG=off and one or both LEDs
GP/HD=ON). Chapter "PG (Power Good) LED" in User Guide of CCM-BOOGIE describes this
in detail: http://www.ekf.de/c/ccpu/ccm/ccm_uge.pdf

To bring the board back to working state the (red) ejector handle in front panel of
CCM-BOOGIE must simply be opened for a short time (important: less than 4 seconds).
Note: This implies that BIOS setup option "Function of front panel ejector:" is not
changed from its default setting "Power button". More info on this: Chapter "Reset"
in User Guide of CCM-BOOGIE. See also http://www.ekf.de/c/ccpu/img/reset_400.gif

Technical background:

On EKF CCM-BOOGIE there are 5 reasons why the system enters S4/S5 (sleep) state 
after power-up, instead of S0 (running) state:

1. The user sets BIOS Setup option "Advanced -> Miscellaneous Configuration -> State
   after Power-On:" to mode "Go to S4/S5". The default mode is "Go to S0".

   Description of BIOS Setup item, which controls board behaviour after power-up (G3):
   -> Setup (F2): Advanced -> Miscellaneous Configuration -> State after Power-On:
   Available options:
   a. Go to S0 (Factory Default): After power-on the system always enters S0 state,
      even if the system was in a sleep state at power-off
   b. Go to S4/S5: The system enters S0 state if it was not in a sleep state at power-off.
      It goes to S4 (or S5) sleep state if it was in state S4 (or S5) at power-off.

Even if user option above is set to "Go to S0" there are four reasons, controlled
by ICH9 internal hardware, which force sleep state S5 after power-up:

2. The corresponding bit in the SMBus unconditional power down message is set

3. ICH9 internal thermal sensor catastrophic condition (ICH9 overheating)

4. Assertion of THRMTRIP# signal at ICH9 (Processor or GS45 overheating)

5. A Power Button Override event (pressing Power Button more than 4 seconds)


2) Behaviour of LED GP in front panel of CCM-BOOGIE during POST
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LED GP (General Purpose) in front panel of CCM consists of two separate LEDs, one red,
one green. If both are switched on, it can be seen as orange through the panel. Note,
the following behaviour of LED GP is only valid if LED PG (Power Good) lights up green
and for CCM-BOOGIE BIOS Builds >= 108:
- A red blinking LED GP indicates: BIOS has not started (-> Board Failure)
- LED GP off immediately after Reset indicates a successful BIOS start
- Approximately one second after Reset green LED GP is switched on to indicate
  a successful start of Legacy BIOS
- Orange LED GP is switched on if the keyboard is ready for F2 key (BIOS Setup)
  or F11 key (Boot Menu). This eases the timing of F2/F11 key presses, cause some
  displays need too much time for their own initialization (i.e. they are not
  yet able to show messages sent from POST).
- Green LED GP is switched on again before BIOS Setup
- Green LED is switched off immediately before Boot


Last modified: 2013-06-11 EKF