After adding mitigations=off to the kernel command line, 5.4.0-132-generic boots successfully every time. This workaround satisfies me. I don't need those mitigations on that old PC, and turning them off probably speeds it up a bit.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-hwe-5.4 in Ubuntu. https://bugs.launchpad.net/bugs/1997160 Title: Kernels 128, 131 and 132 won't boot on Pentium 3, attempted to kill the idle task Status in linux-hwe-5.4 package in Ubuntu: New Bug description: I am running Ubuntu 18.04.6 LTS on an old PC with a Pentium 3 and Soltek SL-65KVB motherboard. The 5.4.0 generic kernels work fine up to and including release 126. Attempts to boot 128, 131 and 132 quickly lead to a panic every time. The error seems to be "Attempted to kill the idle task". I tried idle=halt and idle=poll kernel command line options without any change. The installation procedure for the kernels seems fine, because I installed kernel 125 after installing the problem kernels, and it worked. I am attaching a photo of what the screen shows when the crash happens. I could try to capture more of that via a serial port if that would be helpful. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-image-5.4.0-126-generic 5.4.0-126.142~18.04.1 ProcVersionSignature: Ubuntu 5.4.0-126.142~18.04.1-generic 5.4.203 Uname: Linux 5.4.0-126-generic i686 ApportVersion: 2.20.9-0ubuntu7.28 Architecture: i386 CurrentDesktop: XFCE Date: Sat Nov 19 18:01:57 2022 InstallationDate: Installed on 2012-10-07 (3695 days ago) InstallationMedia: Mythbuntu 12.04.1 "Precise Pangolin" - Release i386 (20120818.1) SourcePackage: linux-hwe-5.4 UpgradeStatus: Upgraded to bionic on 2018-04-08 (1686 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-hwe-5.4/+bug/1997160/+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
