Stuck on a plain black screen waiting for the disk unlock password

[Daniel van Vugt]

Plymouth never displays anything -- the boot process is a plain black screen.

Workaround:

Tap Esc once to see text mode.
Tap Esc a second time to get the Plymouth graphical screen.

I only figured that out when I had been waiting too long for the disk decryption prompt.

ProblemType: Bug
DistroRelease: Ubuntu 23.04
Package: plymouth 22.02.122-3ubuntu1
ProcVersionSignature: Ubuntu 6.2.0-18.18-generic 6.2.6
Uname: Linux 6.2.0-18-generic x86_64
ApportVersion: 2.26.0-0ubuntu2
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: pass
Date: Fri Mar 24 13:50:04 2023
DefaultPlymouth: /usr/share/plymouth/themes/bgrt/bgrt.plymouth
InstallationDate: Installed on 2023-03-24 (0 days ago)
InstallationMedia: Ubuntu 23.04 "Lunar Lobster" - Alpha amd64 (20230317)
MachineType: LENOVO 21CBCTO1WW
ProcCmdLine: BOOT_IMAGE=/vmlinuz-6.2.0-18-generic root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash vt.handoff=7
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-256color
 XDG_RUNTIME_DIR=<set>
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.2.0-18-generic root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash vt.handoff=7
SourcePackage: plymouth
TextPlymouth: /usr/share/plymouth/themes/ubuntu-text/ubuntu-text.plymouth
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/31/2023
dmi.bios.release: 1.36
dmi.bios.vendor: LENOVO
dmi.bios.version: N3AET71W (1.36 )
dmi.board.asset.tag: Not Available
dmi.board.name: 21CBCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0T76530 WIN
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.17
dmi.modalias: dmi:bvnLENOVO:bvrN3AET71W(1.36):bd01/31/2023:br1.36:efr1.17:svnLENOVO:pn21CBCTO1WW:pvrThinkPadX1CarbonGen10:rvnLENOVO:rn21CBCTO1WW:rvrSDK0T76530WIN:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_21CB_BU_Think_FM_ThinkPadX1CarbonGen10:
dmi.product.family: ThinkPad X1 Carbon Gen 10
dmi.product.name: 21CBCTO1WW
dmi.product.sku: LENOVO_MT_21CB_BU_Think_FM_ThinkPad X1 Carbon Gen 10
dmi.product.version: ThinkPad X1 Carbon Gen 10
dmi.sys.vendor: LENOVO

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Daniel van Vugt (vanvugt)]

I'm hoping this is hardware-specific (ADL-P, OLED, whatever). It doesn't seem to happen on other systems running lunar.

[Daniel van Vugt (vanvugt)]

There is nothing failing according to my plymouth debug log. Also it doesn't seem to occur on any other machine type. So this is on hold awaiting upstream advice.

[Daniel van Vugt (vanvugt)]

Actually I have found that adding an external monitor fixes the issue on the internal screen. So now I know it's not an unreachably low level kernel issue I can investigate the differences.

[Sebastien Bacher (seb128)]

Changing to rls-ll-notfixing, there has been no recent activity nor duplicate which suggests it doesn't need to be handle as a rls target issue

[Daniel van Vugt (vanvugt)]

^^^
We're guessing it's already fixed upstream by:
https://gitlab.freedesktop.org/plymouth/plymouth/-/commit/5d758194621ae40ef2b2613fd86101652114cbd3

[Daniel van Vugt (vanvugt)]

No it wasn't fixed.