Re: hardware/ software problem on boot
Re: hardware/ software problem on boot
- Subject: Re: hardware/ software problem on boot
- From: "Tony OCallaghan" <email@hidden>
- Date: Tue, 20 Jun 2006 14:31:58 +0100
hi jonas,
thank you for your reply.
if you type in cmd option n v nvram to google you will get a few references,
http://homepages.gold.ac.uk/suzanne/startup.html
for example
cmd option p r only clears the pram as far as i am aware.
I reset the pmu but the same problem persists (i know it worked because it reset my system clock back a few decades :)
if you have any more ideas, please let me know,
thank you,
tony
On 20/06/06, Jonas Maebe <email@hidden> wrote:
On 20 jun 2006, at 14:45, Tony OCallaghan wrote:
> nvram autoboot?="false" in the terminal, this causes the machine to
> go into
> the open firmware, however at the start it still requires me to
> hold down
> the cmd + option + f + o. Upon further investigation I found that just
> holding the cmd key will boot the machine (it doesn't however give
> me the
> choice of operating systems to boot like it should).
You have to hold down option to get that dialog, not cmd.
> I tried resetting the
> pram by using the command cmd + option + p + r, however this did
> not work
> properly, I did however get the reset the pram while in the open
> firmware
> prompt. This obviously did not fix the problem. Then i tried to
> reset the
> nvram by using the command cmd + option + n + v at startup,
I've never before heard of the the combination cmd + option + n + v.
The way to reset most of the nvram is by holding cmd + option + p + r
until the machine has rebooted itself three times (as opposed to only
once).
> which actually
> brought me to the dialogue you would expect when you hold down the cmd
> button only i.e. it brought me to the dialogue where you can select
> which
> operating system you want to boot.
Probably triggered by the option key you were holding down.
> I reset the nvram when I was in the open
> firmware prompt which had no effect. It cannot be a problem with the
> keyboard input boot driver since when i'm in open firmware it
> recognises all
> the buttons on the kayboard correctly.
> Does anyone have an clue what is going on. It doesn't seem to be a
> problem
> with the firmware.
You can try to reset the pmu:
http://docs.info.apple.com/article.html?artnum=14449
Jonas
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