Created attachment 1800132 [details] Kernel log from: journalctl --no-hostname -k > dmesg.txt =====Problem description: After kernel update, F33 and F34 show many "soft lockup" errors and get stuck in booting up, running, shutting down; leading to component failures. =====Did it work previously / kernel version It does work previously with `5.10.23-200.fc33.x86_64`. First problematic kernel version is `5.11.7-200.fc33.x86_64`. =====Reproducibility: Always =====Steps to reproduce: * Upgrade to latest Fedora 33 packages on that machine * Restart =====Actual outcome: * When booting up, see several `watchdog: BUG: soft lockup - CPU#0 stuck for 26s!` and `watchdog: BUG: soft lockup - CPU#1 stuck for 26s!` at random points, often resulting in further issues (random example: `Timed out waiting for device /dev/mapper/fedora_localhost--live-home`) * If going into bootlevel 3, have quite some lag entering characters at prompt * If getting into UI, very slow mouse movement and responsiveness in GNOME =====Hardware: Acer Aspire 1 A114-32-C6L7 $> uname -m x86_64 $> uname -r 5.11.21-200.fc33.x86_64 $> sudo dmidecode System Information Manufacturer: Acer Product Name: Aspire A114-32 Version: V1.15 Base Board Information Mainfacturer: GLK Product Name: Bulbasaur_GL_S Version: V1.15 Type: Motherboard Processor Information Version: Intel(R) Celeron(R) N4000 CPU @ 1.10GHz =====Reproducibility with other kernel versions: * Problem also reproducible on F34's latest `kernel-5.12.14-300.fc34.x86_64`. * Problem also reproducible running `Fedora-Workstation-Live-x86_64-34-1.2.iso` from a USB stick on that machine. =====Running any modules not shipped with directly Fedora's kernel: No such modules used. =====Other information: * Further info how to debug is welcome. * Passing boot parameter `rcutree.use_softirq=0` did not help. * Seems like most similar tickets lack progress or info (e.g. bug 1943866)
Any hints how to further debug or track down? I'd like to update that machine to F34 at some point.
I might first recommend trying a 5.13 kernel https://fedoraproject.org/wiki/Test_Day:2021-07-11_Kernel_5.13_Test_Week has instructions and links. You can either try the full f34 ISO or just install the kernel. If that doesn't fix it, it might also be worth trying 5.14-rc1 https://koji.fedoraproject.org/koji/buildinfo?buildID=1780011 and post results. we can go from there.
To be explicit: I should manually install the latest F35 kernel on an F33 system, correct? (Currently travelling; will take a few weeks until I get hold of that machine again)
Still same problem with `5.13.12-100.fc33` (latest kernel offer for F33). Still same problem with manually installed `5.14.0-60.fc35`.
Still same problem with latest/last kernel available for F33 `5.14.18-100.fc33`. No problem anymore when using latest F34 kernel available `5.16.15-101.fc34` on Fedora 33.