I have the same issue on a desktop Intel i5 4th gen NVidia GTX970
I have a fresh Install Ubuntu with encryption. By default it uses Nouveau Driver >From the driver UI, I switch to nvidia, then I reboot and the problem appear. Scenarios 1. default kernel loading It prompt with a low res screen and the disk decryption password doesn't work. When I type nothing is shown. If I switch terminal with CTRL+ALT+F6 then CTRL+ALT+F7, I can see the password in clear Text and it doesn’t reload the UI 2. Most Recent kernel with (Upstart) same as default 3. Most Recent kernel Recovery Enter password in text mode When Prompt, select "Resume normal boot" Works fine 4. Previous Kernel (default) Ask GUI disk password and work fine 5. Previous Kernel Upstart Ask disk password and hangs there 6. Pervious Kernel Recovery same as 3 but stock in 1024x768 res I made the following changes : GRUB_GFXMODE=2560x1440 GRUB_GFXPAYLOAD_LINUX=keep GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash noplymouth” -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1386005 Title: Password not accepted graphical boot for encrypted root system To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/plymouth/+bug/1386005/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs