I believe I'm experiencing the same bug after an in situ upgrade from Linux Mint 17.3 (based on Ubuntu 14.04) to 18.0 (running 4.4.0 kernel by default). I find that the boot process changes the graphics mode once (after selecting the default kernel) but with a black (but lit) screen (as opposed to the black unlit screen when modes switch), no visible text or graphics.
Prior to the upgrade I was also running a 4.4.0 kernel (with 17.3), and had no issues with getting the orange-ish decryption screen prior to the full boot. I find that I can enter my passphrase even without seeing a prompt, and (if typed successfully!) it then proceeds to a graphical login. Going back to an earlier kernel (4.2.0, still installed) gives me a text-mode decryption form (not the graphical mode version). I'm running this on a Thinkpad X1 Carbon (v2) with 1600x900 LCD, Intel graphics. I've implemented the suggested GRUB tweaks above and will report if they make any difference at my next reboot. -- 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/1359689 Title: cryptsetup password prompt not shown Status in linux package in Ubuntu: Triaged Status in linux source package in Utopic: Won't Fix Status in linux source package in Vivid: Triaged Status in plymouth package in Debian: Fix Released Bug description: Currently in utopic the following happens when booting an encrypted setup: Press enter in grub, after a while screen freezes (or turns completely black) and stays like that. When I press the down key, I can see the password prompt. When I press the up key again, I get to the graphical password prompt. This is demonstrated in the following screencast: https://drive.google.com/file/d/0B7EMvd1LJKgZREJocHBueEhpa2s/edit?usp=sharing Maybe this is related to the version of plymouth utopic currently uses, a similar debian bug report seems to be resolved with a newer version 0.9.0-6, see https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=752752. --- ApportVersion: 2.14.6-0ubuntu2 Architecture: amd64 DistroRelease: Ubuntu 14.10 InstallationDate: Installed on 2014-08-21 (0 days ago) InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140821) Package: plymouth 0.9.0-0ubuntu3 PackageArchitecture: amd64 ProcVersionSignature: Ubuntu 3.16.0-9.14-generic 3.16.1 Tags: utopic Uname: Linux 3.16.0-9-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: _MarkForUpload: True --- ApportVersion: 2.14.6-0ubuntu2 Architecture: amd64 DefaultPlymouth: /lib/plymouth/themes/ubuntu-logo/ubuntu-logo.plymouth DistroRelease: Ubuntu 14.10 InstallationDate: Installed on 2014-08-21 (0 days ago) InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140821) MachineType: Dell Inc. Precision M4600 Package: plymouth 0.9.0-0ubuntu3 PackageArchitecture: amd64 ProcCmdLine: BOOT_IMAGE=/vmlinuz-3.16.0-9-generic root=/dev/mapper/VG--Ubuntu-LV--Ubuntu--ROOT ro rootflags=subvol=@ cryptopts=target=Ubuntu,source=/dev/disk/by-uuid/6fc200da-aa04-4e73-b6a7-a2326f0b6204,lvm=VG-Ubuntu quiet splash vt.handoff=7 ProcFB: 0 nouveaufb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.16.0-9-generic root=/dev/mapper/VG--Ubuntu-LV--Ubuntu--ROOT ro rootflags=subvol=@ cryptopts=target=Ubuntu,source=/dev/disk/by-uuid/6fc200da-aa04-4e73-b6a7-a2326f0b6204,lvm=VG-Ubuntu quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 3.16.0-9.14-generic 3.16.1 Tags: utopic TextPlymouth: /lib/plymouth/themes/ubuntu-text/ubuntu-text.plymouth Uname: Linux 3.16.0-9-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: _MarkForUpload: True dmi.bios.date: 03/10/2013 dmi.bios.vendor: Dell Inc. dmi.bios.version: A14 dmi.board.vendor: Dell Inc. dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA14:bd03/10/2013:svnDellInc.:pnPrecisionM4600:pvr01:rvnDellInc.:rn:rvr:cvnDellInc.:ct9:cvr: dmi.product.name: Precision M4600 dmi.product.version: 01 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1359689/+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
