I am having this same issue on my Lenovo X220. Using Ubuntu 20.04.1 LTS. I am able to boot by disabling the splash screen using:
BOOT_IMAGE=/boot/vmlinuz-5.4.0-51-generic root=UUID=70d5c302-0fe3-4a83-9076-ca834b973ac3 ro nosplash I am using the stock kernel: Linux version 5.4.0-51-generic (buildd@lcy01-amd64-020) (gcc version 9.3.0 (Ubuntu 9.3.0-10ubuntu2)) #56-Ubuntu SMP Mon Oct 5 14:28:49 UTC 2020 I have not tried "nomodeset". -- 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/1877889 Title: Intermittent hangs on boot Ubuntu 20.04 on Lenovo E595 Status in linux package in Ubuntu: Confirmed Bug description: Hello, I see occasional hangs on boot. The hangs occur after entering the LUKS decryption password for the root filesystem, and before the login screen is displayed. The "/boot" filesystem is not encrypted, so the initramfs is loading fine etc. The hangs are intermittent. Sometimes I don't see a hang for 10+ boots in a row, and sometimes I'll get a hang 5 times in a row. When the hang occurs the boot splash screen is visible (not the login screen). The system is still responsive to SysRq keys, so I can somewhat safely issue S+U+S+B sequence to try booting again without corrupting much. I have tried removing the "quiet splash" kernel parameters that are enabled by default on Ubuntu desktop to see if any interesting messages occur that way. So far however I have not experienced a hang with "quiet splash" removed. This system is a Lenovo E595 (Ryzen 3500U) with the latest BIOS from Lenovo installed (v1.16), running Ubuntu 20.04 desktop. I am submitting this bug using `ubuntu-bug linux-image-generic`, but I don't know for sure if this is a kernel issue or something else. I suspect my bug might be the same as this one already reported ( https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1873594 ), but I'm filing my own anyway as a means to capture more details of my system. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-generic 5.4.0.29.34 ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30 Uname: Linux 5.4.0-29-generic x86_64 ApportVersion: 2.20.11-0ubuntu27 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: paul 2507 F.... pulseaudio /dev/snd/controlC0: paul 2507 F.... pulseaudio CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Sun May 10 20:09:53 2020 MachineType: LENOVO 20NFCTO1WW ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-29-generic root=UUID=f466d4ea-c251-4721-b071-bd70c82f00e1 ro rootflags=subvol=@ splash quiet vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-5.4.0-29-generic N/A linux-backports-modules-5.4.0-29-generic N/A linux-firmware 1.187 SourcePackage: linux UpgradeStatus: Upgraded to focal on 2020-04-24 (15 days ago) dmi.bios.date: 03/30/2020 dmi.bios.vendor: LENOVO dmi.bios.version: R11ET36W (1.16 ) dmi.board.asset.tag: Not Available dmi.board.name: 20NFCTO1WW dmi.board.vendor: LENOVO dmi.board.version: Not Defined dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrR11ET36W(1.16):bd03/30/2020:svnLENOVO:pn20NFCTO1WW:pvrThinkPadE595:rvnLENOVO:rn20NFCTO1WW:rvrNotDefined:cvnLENOVO:ct10:cvrNone: dmi.product.family: ThinkPad E595 dmi.product.name: 20NFCTO1WW dmi.product.sku: LENOVO_MT_20NF_BU_Think_FM_ThinkPad E595 dmi.product.version: ThinkPad E595 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1877889/+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
