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I'm currently running 14.04 beta on a Lenovo Thinkpad Twist (s230u). As the OS boots into the login screen, the built-in mouse and keyboard are disabled. The touch screen remains active, however.

I've found a way around this: using the touch screen I reboot the system. As it boots for the second time, the keyboard is functional. The mouse however remains inactive until i log in.

I've experienced the same issues on 13.10. Any help is appreciated. Thnx!

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I had the same problem but found a solution by changing my BIOS settings of my Lenovo Flex 15 Easypad. I had to change the BIOS-setting "UEFI optimized for Windows 8" (was preinstalled on this laptop, I erased it and installed Lubuntu 14.04) to "Other OS". That did the trick for me.

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There is a bug in several Linux distributions with keyboard/trackpad recognition.

You can fix with this line to /etc/default/grub

GRUB_CMDLINE_LINUX="i8042.nomux=1 i8042.reset"

Then update grub file with sudo update-grub

Check this link for details (this is for Mint distro, but same issue).

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