Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.13 kernel[0]. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.13 ** Changed in: linux (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1716258 Title: Keyboard input temporarily ignored when typing root encryption password Status in linux package in Ubuntu: Incomplete Bug description: Symptoms: The computer begins its boot process, then the root decryption password prompt appears (via Plymouth) and I start typing. The first letters are caught, but some letters are not captured. It's as if the keyboard shut down during a few seconds and then returned, and I could type the whole password properly. Things I tried: - Typing the password blindly (just inputting the entire password and hitting Enter without worrying about missing characters) but it rejected the password as incorrect. - Typing decryption password without Plymouth (this is not a Plymouth bug). This affects Debian 9 (didn't affect Debian 8), Fedora, Arch Linux and possibly others. It cannot be reproduced with Ubuntu or other distributions with old packages. Some component introduced this problem recently. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1716258/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp