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Linux causing failing wake-on-RTC function on an ASUS A8N-SLI motherboard



Hi list,

I have an ASUS A8N-SLI nForce4-based motherboard, running Debian testing. A 
few months back the wake-on-RTC function stopped working. It turns out that 
something about Linux is causing this. When I boot Linux, whether I shutdown 
properly or hit the power-button, wake-on-RTC won't work - the machine won't 
boot at a given time like I tell it to in the BIOS. However, if after setting 
the time to boot in the BIOS I switch the machine off before it gets a chance 
to boot, wake-on-RTC works just fine, and also, when booted into WinXP and 
shutdown properly. Interestingly, when booted to WinXP and powered-off 
manually (improperly), wake-on-RTC doesn't work.

So I'm pretty perplexed. It's like there's something about the wake-on-RTC the 
motherboard forgets upon booting an OS, possibly from loading a driver, and 
WinXP, but not Linux, remembers to set it back when shutting down. Or 
something.

I have a feeling it might've started around when the kernel went from 2.6.16 
to 2.6.17, but I'm not sure.

Anyone have any ideas where I should look? Who I should ask?

Peace,
Brendon

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