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.
** No longer affects: linux (Ubuntu) ** Changed in: plymouth (Ubuntu) Status: In Progress => New -- 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/2012698 Title: Plymouth is just a plain black screen Status in Plymouth: Unknown Status in plymouth package in Ubuntu: New Bug description: 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 To manage notifications about this bug go to: https://bugs.launchpad.net/plymouth/+bug/2012698/+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