I have an Dell XPS 7390 that I wanted to use as a test before I buy a dedicated device for it.
I put openwrt on a pendrive and booted , but it gets stuck on i915 0000:00:02.0: Failed to load DMC firmware,disabling runtime power management.
It does not continue after.I have pressed all buttons, waited for half hour. I have tried latest snapshot as well as old version like 21 and ofcourse the latest stable one.
How did you install OpenWrt on the pendrive? There is nothing in your post that resembles any OpenWrt related error messages.
The more you can detail the steps you took in trying to install OpenWrt the better someone here can assist. ie, installation instructions followed, firmware version downloaded, boot process, . . . Anything!
It sure looks like a USB issue for the keyboard, all those device not responding messages can't be good. Is the keyboard plugged into a USB 3 port, maybe try a USB 2 one???
I attached an external keyboard but its still not reacting. However ctrl+alt+delete does reboot the laptop so keyboard is working. Same with internal one (its a laptop)