** Tags added: kernel-daily-bug -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb https://bugs.launchpad.net/bugs/2150621 Title: regression: booting instability and large variance in booting success Status in linux package in Ubuntu: New Bug description: fresh install of ubuntu 26.04 from the installation media works fine and flawlessly. the laptop (thinkpad e14 gen 6, ryzen 5, radeon) boots fine each time etc. but as soon as i install our usual set of packages, which includes xfce4, all hell breaks loose. xfce4 namely pulls in lightdm and even when gdb3 is chosen over it, i observe the following spiral of events: first boot after a reboot is usually fine. second boot usually gets hung on a "underscore screen of death" where only a single underscore is shown in the upper left corner and the rest is just a black screen. the kernel is still running since ctrl- alt-del works and also REISUB but one cannot do anything else with it, ie no linux console accessible. so the booting usually does not go beyond the third time. i say "usually" since to triage the problem i have now made a fresh install of ubuntu already for the 11th time. always the same story. vanilla install works fine. as soon as (i guess non-wayland x11 stuff is installed) the booting experience is very different each time and finally fails. sometimes instead of the underscore screen i end up with a message about kdump-tools being started and ucsi_acpi USBC000:00: error -ETIMEOUT: PPM failed, but sometimes not. btw, i had to remove "splash" from the kernel options to see this stuff, with splash running the boots end up either spinning for ever, or with underscore black screen, or simply frozen spinner, which unfreezes on ctrl-alt-del and spews out all the shutdown messages. this has been very frustrating indeed, but with this laptop there were glimpses of this starting already with ubuntu 25.04 and then also in 25.10. what helped there was simply to disconnect the thinkpad docking station for boot and connect it back when fully booted and the gdm3 login appears. ProblemType: Bug DistroRelease: Ubuntu 26.04 Package: linux-image-7.0.0-14-generic 7.0.0-14.14 ProcVersionSignature: Ubuntu 7.0.0-14.14-generic 7.0.0 Uname: Linux 7.0.0-14-generic x86_64 ApportVersion: 2.34.0-0ubuntu2 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Wed Apr 29 09:42:06 2026 InstallationDate: Installed on 2026-04-28 (1 days ago) InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1) IwDevWlp2s0Link: Not connected. MachineType: LENOVO 21M3002TGE ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-14-generic root=UUID=28776a6c-f402-431c-ba0d-61e0053cdb0e ro quiet splash crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 05/09/2025 dmi.bios.release: 1.16 dmi.bios.vendor: LENOVO dmi.bios.version: R2KET33W (1.16 ) dmi.board.asset.tag: Not Available dmi.board.name: 21M3002TGE dmi.board.vendor: LENOVO dmi.board.version: ThinkPad dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.ec.firmware.release: 1.16 dmi.modalias: dmi:bvnLENOVO:bvrR2KET33W(1.16):bd05/09/2025:br1.16:efr1.16:svnLENOVO:pn21M3002TGE:pvrThinkPadE14Gen6:rvnLENOVO:rn21M3002TGE:rvrThinkPad:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_21M3_BU_Think_FM_ThinkPadE14Gen6:pfaThinkPadE14Gen6: dmi.product.family: ThinkPad E14 Gen 6 dmi.product.name: 21M3002TGE dmi.product.sku: LENOVO_MT_21M3_BU_Think_FM_ThinkPad E14 Gen 6 dmi.product.version: ThinkPad E14 Gen 6 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2150621/+subscriptions
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