apport information ** Tags added: apport-collected zena
** Description changed: **Title:** `rcu_tasks_wait_gp stalls on linux-image-7.0.0-28/29-generic (HWE noble), not present on 6.17.0-40-generic` **Description:** System: Intel Core i7-8700K, Linux Mint 22.3 "Zena" (Ubuntu 24.04 noble base), x86_64 Affected kernels: `7.0.0-28-generic` and `7.0.0-29-generic` (linux-generic-hwe-24.04) Working kernel: `6.17.0-40-generic` — zero occurrences of the same issue **Symptom:** Repeated `rcu_tasks_wait_gp` grace-period warnings in the kernel log shortly after boot, occurring continuously during normal desktop use (not idle). **Reproduction / measurements:** - On `7.0.0-28-generic`: ~656 occurrences of `rcu_tasks_wait_gp` logged over roughly 6 hours of normal desktop use (`journalctl -k`) - On `7.0.0-29-generic`: 19 occurrences within the first 10 minutes after boot (~114/hour), rising to worse than the -28 rate - On `6.17.0-40-generic`: 0 occurrences over multiple days of equivalent use, including with identical workload (LocalWP/Electron app running MySQL + Node/GraphQL services) **Correlated symptom:** While on the affected kernels, an Electron-based local dev app (LocalWP) exhibited unexpected MySQL service restarts (multiple `mysqld` startups within a couple of minutes, on changing ports) that did not occur on `6.17.0-40-generic` under the same usage pattern. This may or may not be directly caused by the RCU stalls but was consistently reproducible alongside them. **To reproduce:** 1. Boot into `7.0.0-28-generic` or `7.0.0-29-generic` 2. Run: `journalctl -k -b 0 --no-pager | grep -c "rcu_tasks_wait_gp"` after 10+ minutes of normal use 3. Compare against the same check on `6.17.0-40-generic` after equivalent uptime **System info:** ``` Linux z-390 6.17.0-40-generic #40~24.04.1-Ubuntu SMP PREEMPT_DYNAMIC Tue Jun 23 16:48:12 UTC 2 x86_64 x86_64 x86_64 GNU/Linux Distributor ID: Linuxmint Description: Linux Mint 22.3 Release: 22.3 Codename: zena CPU: Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz ``` + --- + ProblemType: Bug + ApportVersion: 2.28.3-0ubuntu0.1 + Architecture: amd64 + AudioDevicesInUse: + USER PID ACCESS COMMAND + /dev/snd/controlC0: robertfeddes 3626 F.... wireplumber + /dev/snd/controlC1: robertfeddes 3626 F.... wireplumber + /dev/snd/seq: robertfeddes 3623 F.... pipewire + CRDA: N/A + CasperMD5CheckResult: pass + CurrentDesktop: X-Cinnamon + DistroRelease: Linux Mint 22.3 + InstallationDate: Installed on 2025-11-07 (287 days ago) + InstallationMedia: Linux Mint 22.2 "Zara" - Release amd64 20250828 + MachineType: Gigabyte Technology Co., Ltd. Z390 GAMING X + NonfreeKernelModules: nvidia_modeset nvidia + Package: linux (not installed) + ProcFB: 0 nvidia-drmdrmfb + ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-29-generic root=UUID=121c84a6-bf21-49c3-abcd-99a489cb9cb6 ro quiet splash zswap.enabled=1 zswap.zpool=zsmalloc zswap.compressor=lz4 + ProcVersionSignature: Ubuntu 7.0.0-29.29~24.04.2-generic 7.0.12 + PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. + RelatedPackageVersions: + linux-restricted-modules-7.0.0-29-generic N/A + linux-backports-modules-7.0.0-29-generic N/A + linux-firmware 20240318.git3b128b60-0ubuntu2.29 + RfKill: + 0: hci0: Bluetooth + Soft blocked: no + Hard blocked: no + Tags: zena + Uname: Linux 7.0.0-29-generic x86_64 + UpgradeStatus: No upgrade log present (probably fresh install) + UserGroups: adm cdrom dip docker kvm lpadmin ollama plugdev sambashare sudo users + _MarkForUpload: True + dmi.bios.date: 12/21/2023 + dmi.bios.release: 5.13 + dmi.bios.vendor: American Megatrends Inc. + dmi.bios.version: F11 + dmi.board.asset.tag: Default string + dmi.board.name: Z390 GAMING X-CF + dmi.board.vendor: Gigabyte Technology Co., Ltd. + dmi.board.version: Default string + dmi.chassis.asset.tag: Default string + dmi.chassis.type: 3 + dmi.chassis.vendor: Default string + dmi.chassis.version: Default string + dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF11:bd12/21/2023:br5.13:svnGigabyteTechnologyCo.,Ltd.:pnZ390GAMINGX:pvrDefaultstring:rvnGigabyteTechnologyCo.,Ltd.:rnZ390GAMINGX-CF:rvrDefaultstring:cvnDefaultstring:ct3:cvrDefaultstring:skuDefaultstring:pfaDefaultstring: + dmi.product.family: Default string + dmi.product.name: Z390 GAMING X + dmi.product.sku: Default string + dmi.product.version: Default string + dmi.sys.vendor: Gigabyte Technology Co., Ltd. ** Attachment added: "AlsaInfo.txt" https://bugs.launchpad.net/bugs/2164624/+attachment/5994061/+files/AlsaInfo.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2164624 Title: rcu_tasks_wait_gp stalls on 7.0.0-28/29-generic (HWE noble), absent on 6.17.0-40-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2164624/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
