>> via the -proposed pocket you could even try out the latest version 6.11.0-1010.10.
With the proposed pocket the issue is improved- the issue occurs about ~50% of the time the test is repeated. Linux ubuntu 6.11.0-1010-raspi #10-Ubuntu SMP PREEMPT_DYNAMIC Tue Feb 25 02:37:49 UTC 2025 aarch64 aarch64 aarch64 GNU/Linux I added 'proposed' to the config in /etc/apt/sources.list.d/ubuntu.sources and installed with sudo apt install linux-image-raspi -t oracular-proposed sudo apt install linux-firmware -t oracular-proposed I've attached dmesg output for the two cases: 6_11_1010_dmesg_after_panic_initialized_ok.txt 6_11_1010_dmesg_after_panic_initialization_failed.txt That seems like progress - do you have any recommendations on further troubleshooting/investigation steps from here? ** Attachment added: "dmesg output from 6.11.0-1010-raspi" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2099935/+attachment/5860659/+files/6_11_1010_dmesg_after_panic.zip.zip -- 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/2099935 Title: PCI initialization failure following kernel panic reboot on Raspberry Pi CM4 Status in linux package in Ubuntu: Invalid Status in linux-raspi package in Ubuntu: Confirmed Bug description: Ubuntu Server 24.10 Linux ubuntu 6.11.0-1004-raspi #4-Ubuntu SMP PREEMPT_DYNAMIC Fri Sep 27 22:25:34 UTC 2024 aarch64 aarch64 aarch64 GNU/Linux We're seeing that following a kernel panic and reboot, the PCI fails to initialize correctly and associated devices (such as Wi-Fi card) are not available. Issue Description: • On the first boot, everything works correctly. • However, after a Kernel Panic, the device reboots, but PCIe does not reset or re-initialize properly. • When this happens: o The Wi-Fi card is not recognized. o The lspci command shows no PCI devices. o The dmesg log includes the message: [ 0.591441] brcm-pcie fd500000.pcie: link down • A soft reboot does not fix the issue. • The only way to recover is to completely remove and reconnect power (hard reboot). We have tried modifying /boot/firmware/config.txt and /boot/firmware/cmdline.txt, which has reduced but not fully resolved the issue. How to Reproduce The Problem: 1. Power up the hardware 2. Run ‘lspci’ – observe the result includes the PCI Bridge and Wi-Fi card 3. Trigger a kernel panic with the command ‘echo c | sudo tee /proc/sysrq-trigger’, causing a reboot 4. Run ‘lspci’ – observer the output is now empty The same issue does not occur on Raspberry Pi OS - it seems to be specific to Ubuntu. Any assistance/guidance on how to troubleshoot this would be much appreciated! To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2099935/+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
