Hi, thanks for posting here in Microsoft community, I understand how inconvenient it is when your keyboard and mouse stop working after sleep. From what you described, the root cause is likely tied to how the motherboard’s USB ports handle power states during sleep.
Even though the devices light up, the system may not reinitialize those ports correctly when waking up. Since you’ve already adjusted power settings, the next step is to check if USB selective suspend is disabled in your advanced power settings and confirm that your chipset and USB drivers are fully updated from the manufacturers site.
Also, review your BIOS settings to ensure USB wake support is enabled and that power management options aren’t restricting those ports. If the issue only happens on certain motherboard ports, try testing with different ones to rule out a hardware level problem.
Have you noticed if this happens after a specific duration of sleep or only intermittently? And do you have any third-party USB hubs or devices connected that might affect wake behavior? If these steps don’t resolve it, we can look into updating the BIOS or adjusting advanced sleep states like S3 or S4. Let me know what you find so we can narrow this down.
I hope this helps you out, let me know how it goes.
Chard