USB problems

Just installed fresh copy of Manjaro and now my motherboard mounted USB ports are not working properly. If I plug a flash into them, nothing happens. Samething with a keyboard and mouse. I only have two working usb drives and they at cases mounted one. Please help. Thank you

What is the motherboard model #?

I also added the helpdesk tag, to your post.

According to the Ubuntu forums ( it can be solved by enabling IOMMU in the BIOS and adding iommu=soft to GRUB.

Open /etc/default/grub and change the line GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" to GRUB_CMDLINE_LINUX_DEFAULT="quiet splash iommu=soft"

Run sudo update-grub and reboot.

Worked perfectly thanks