Solved Bluetooth Keyboard not recognized on reboot

Recently decided to try my Logitech MX keys keyboard on Bluetooth connection instead of Unifying receiver same with my Logitech MX Ergo Trackball.
Everything went fine with pairing both to my PC work fine for both devices.

Except whenever i restart or shutdown my PC when it starts it goes directly to a BIOS screen saying it can not find keyboard.
Soon as i touch the keyboard it boots rest of way to lock screen.

Not sure what causes this yet not very familiar with using Bluetooth on PC much believe it or not.
Kind of like when PC sleeps tapping keyboard wakes it up.

One thing seemed to work was keeping the unifying receiver in USB port even though wasn't being used.
Both Keyboard and trackball have what is called an easy switch able to pair couple of devices to it and switch between them.

Be stupid keep USB receiver in USB port if not using it and using Bluetooth instead. Yes motherboard has Bluetooth of course.

All drivers are up to date including Bluetooth (Intel Wireless Bluetooth).

Any help is appreciated !

As to the keyboard error at bootup, most times the BIOS is set to Halt on keyboard error, might check that. The setting is intended for when a computer is controlled remotely and disabled to allow remote restarting when no keyboard is connected. I once worked in a shop [over 20 years ago] that had all the Dial-Up Modems for a company that provided Internet Service and used an APC Power rack for several computers and the Modems, convenient for resetting when shop was closed.

Berton said:

As to the keyboard error at bootup, most times the BIOS is set to Halt on keyboard error, might check that.

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Any ideas on what to look for in BIOS ?
https://dlcdnets.asus.com/pub/ASUS/...16887_ROG_STRIX_Z490-E_BIOS_manual_EM_WEB.pdf

Section 6.1 page 13. However, I missed the word Bluetooth in your question, there's other settings for that in your BIOS which is much newer than on my ASUS M52bc_M32bc computer.

Berton said:

Section 6.1 page 13.

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Saying change here, but which setting ? Bluetooth is main topic of questioning.

googling this issue seems to mostly show Macs having this problem and even with same keyboard as mine.
BIOS is up to date. Not to keen on tinkering in it unless i am sure of what i am changing.

Ran Bluetooth troubleshooter in Windows for hell of it and it said fixed something with radio status.
Not sure if that did anything, but when i restart or shutdown and reboot still goes to a BIOS screen with info about BIOS version and some of drives info says at bottom Keyboard not found as usual then within seconds go to boot up screen and lock screen.

Didn't do that before till i touched keyboard. Who knows ! Did browse through BIOS manual not sure recognize anything to change yet.

jds63 said:

Not sure if that did anything, but when i restart or shutdown and reboot still goes to a BIOS screen with info about BIOS version and some of drives info says at bottom Keyboard not found as usual then within seconds go to boot up screen and lock screen.

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Now that time between BIOS and startup screen is like a second, so to me now not much of an issue anymore i can live with it.
As long as it works.