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I just installed RedHat Enterprise Linux 7.3 on a new system. After booting into the first-boot set up GUI, my keyboard and mouse are not working. They aren't even powered. I saw during the boot process these two errors:

usbserial: usb_serial_init - usb_register failed

usbserial: usb_serial_init - returning with error -19

I don't know if that's related to my problem. My keyboard/mouse are not connected via a hub, and I tried connecting to different USB ports but they still don't work. Interestingly, they work at the BIOS stage and in the RHEL GUI installer.

How do I fix this problem? Thanks.

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I re-installed RHEL a couple more times, and it finally worked! I don't know why but changing the security policy to something else made USB work.

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