[wellylug] strange power-related problem

Chris Hodgetts chris at archnetnz.com
Wed May 26 22:16:44 NZST 2004

I dont know if this will help or not.

On my compaq laptop, I had this issue, kinda, when you rebooted Linux it
would not get any further than the Bios Splash Screen.

I had to turn off the Local APNIC in the kernel, and that has fixed the

But again, not sure if this is excatly your problem... but it may not be
the powersupply...

> On Wed, 26 May 2004, Enkidu wrote:
>> In spite of the comments from the others, it might be worth throwing a
>> different PSU in there. I presume it's ATX type?
> An ATX system can 'power down' into one of several 'S' states. You can set
> the ACPI powerdown state in the BIOS (usually). To allow Linux to make use
> of this, you have to compile ACPI support into your kernel, if it's not
> there already. One sign that ACPI is working properly is that your mobo
> powers off the PSU after shutdown. If it sits there saying 'Power Off' or
> somesuch, ACPI isn't doing it's thing. Perhaps this affects how the mobo
> responds to 'power on' events - depending on the 'S' state, there will be
> different ways of waking the system up (e.g. Wake-on-Lan, keyboard, mouse
> click, long front panel button depress, etc).
> Having never seen this problem specifically, I can only speculate and
> hopefully point people in the right direction. Hope this helps.
> And Linux 2.6 has much better ACPI support (although nowhere near
> perfect).
> --
> David.
> --
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