So, what are the next steps here (if any)? To summarize, the regular Ubuntu 20.04 GA kernel (v5.4) works reliably for me so long as "nomodeset" is provided as a kernel boot parameter. Without this parameter that kernel and others I was invited to test all hang occasionally on boot.
Is there anything more that needs to happen on this ticket? Do you need me to test other kernel builds for example? Or, is the issue "resolved", and I should keep using "nomodeset" indefinitely? -- 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
