Monday, November 1, 2010

Desire HD - rooting and shutdown, restart and fastboot modes

The Desire HD has 3 modes when it comes to shutdown and startup :
  • full shudown : it's the classical way of shutting down Android. All processes are killed and the caches are flushed. After a shutdown, there is a cold start which takes quite a lot of time : about 25s to get the htc logo with the djingle + 40s more to load Android and ask you to enter your PIN code + 25s more to register on the network.

    rooting : After a full shutdown, the temporary rooting needs to be done again, and any package that may have been disabled (see [GUIDE] Disabling Stock/System Apps) has to be disabled again.
  • restart (reboot) : it's also a classical way to restart Android that takes approximately the same time the full shutdown process takes.

    rooting : After a reboot, the temporary rooting needs to be done again, and any package that may have been disabled (see [GUIDE] Disabling Stock/System Apps) has to be disabled again, like after a full shutdown.
  • fastboot shutdown : this is a new shutdown mode introduced by HTC in its latests smartphones. It basicaly freeze everything (processes, cache, ...) in its state and then has just to unfreeze them to startup. The startup process is then very fast : less than 5s for the phone to ask you to enter your PIN code + 25s more to register on the network.

    rooting : After a fastboot shutdown, the temporary rooting that may exists before the fastboot still exists and does not need to be done again, and any package that may have been disabled (see [GUIDE] Disabling Stock/System Apps) is still disabled. By the way, any app that have been launched before the fastboot is still awake and available through a long press on the Home button.



The power-down screen look like :


The fastboot shudown mode has to be activated from the "Menu" -> "Settings" -> "Applications" -> "Fast boot" checkbox :


The restart option ask for a confirmation :

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