I think it's the power settings of the device about what You're talking. You have simply allowed this device to wake the computer. How the device does this depends on the specific device and its driver settings. There is nothing to do with the BIOS here and there is no need to change any BIOS settings. So check which devices you have allowed to wake up your computer and just disable the ones you no longer want. All I can add is that it is different for different devices, and if it used to be easy to do it through the Device Manager, now this table has been removed from there for quite some time ago. So you have to check the capabilities of your computer yourself. First of all check out what devices are allowed to wake up computer and then how they do it and how you can restrict or diable them.
I think it has to do with the BIOS. These are all settings under ACPI config (section 4.4.5 from the manual above) Quoting: PS/2 Keyboard Power On Allow the system to be waked up by a PS/2 Keyboard. Ring-In Power On Allow the system to be waked up by onboard COM port modem Ring-In signals. RTC Alarm Power On Allow the system to be waked up by the real time clock alarm. Set it to By OS to let it be handled by your operating system. USB Keyboard/Remote Power On Allow the system to be waked up by an USB keyboard or remote controller. USB Mouse Power On Allow the system to be waked up by an USB mouse. PCIE Devices Power On Allow the system to be waked up by a PCIE device and enable wake on LAN. Among other things, the option in bold, has to be enabled in order for this to work Then, as you said, for some devices, you can further do some config in Windows (under power management) e.g. wake on LAN, USB suspend etc But there is no setting within Windows, regarding PS/2 power setting, wake up or whatever Since I have disabled the PS/2 keyboard power on, the PC should no longer power on via the keyboard. But it does. Maybe a bug within the BIOS I didn't have this behavior in the past. It only started recently, after I initially enabled this option. And now, it wouldn't go away
If that's the case, it's in your computer's BIOS, then you're right and it should work if You can disable it there, but there are probably some other settings somewhere that duplicate or overwrite the BIOS setting. But where they are or what they are, I can't guess. I have never meet such a situation. But I'm sure someone knows, it's just a matter of time when somebody tell you.
I can be wrong on the definition of the switch and the function. Not enough information. Looks like PWM_CFG1 refers to other settings. Spoiler Author: wardog Subject: PWM_CFG1 header on Asrock Z170M Pro4 Posted: 01 Nov 2016 at 3:15am PWM_CFG1 is NOT a fan header. Forget it's even there. That "port' is what the factory uses to program each boards PWM settings. As most boards use the same controller it is easier for them to program each board while it's in the production line rather than to have individual bins of this and that boards specifically programmed controllers. If anything, write to the manufacturer's support. You might have found a bug that is unknown due to the rarity of the hardware combination. There is a chance to get a patched BIOS.
Have you try to remove the cmos battery leave it with it for a hour or so and install the battery back in maybe you have better luck
I was thinking of trying that too (although I shouldn't need to, as setting the CMOS reset jumper to 1, should be the same thing) But I ll try this I don't really count on ASRock support getting back to me on this. Historically, I ve never received any response regarding issues/queries on discontinued products
PWM stand for Pulse Width Modulation and (in that context) it's almost surely related to the fan regulation, maybe it changes via HW how the fan speedups on temperature changes. What you are looking for is usually indicated as Power STDBY or similar, and it just switches from the always present 5V or 5V present only when the PC is powered ON. It's meant mainly for a couple of USB ports, but the PS2 could be powered by the same line (for the same purpose, optionally power ON the PC from the keyboard USB or PS2) That said looks like such jumper is not present in this main-board.
I ll just try removing the battery for few minutes and clearing CMOS again Definitely wouldn't go that far like this guy did
Just an update, since I found an alternative way to reach to ASRock - and they did actually respond There is a BIOS option under Advanced >> Deep Sleep >> Enabled for S4-S5 That actually did the trick. Keyboard no longer powers up the PC. As I understand it, it stops power going through the motherboard altogether (once the PC is shut down). So no USB power, no wake functions (anything else?) I did a quick search on this option and didn't find something negative about it, so I might as well leave it on permanently The support staff also mentioned that I should ensure not to hot-plug the PS/2 keyboard, as this could cause hardware/component damage to the motherboard Unfortunately, I wasn't aware of that and I do recollect that in the past, I did hot-plug the keyboard once (it was not responding, so it seemed like the natural thing to do back then...) So I m a bit concerned if that action back then could have caused some sort of damage to the motherboard Are there any reliable diagnostics out there that I could use to do a self-test?
In my experience when the hot plug went bad, the diagnostic was "the keyboard or mouse don't work anymore", a different outcome can't be ruled out but I think it's unlikely