>> FWIW, can you test this kernel: https://people.canonical.com/~juergh/lp2099935/
Are you able to give some pointers on how to install this correctly? I've tried several things but I must be doing something wrong or missing a step. As a starting point my test system already had(/has) 6.11.0-1010-raspi installed. ubuntu@ubuntu:~$ uname -a 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 tried these steps: sudo dpkg -i linux-buildinfo-6.11.0-1009-raspi_6.11.0-1009.9+cbd1_arm64.deb sudo dpkg -i linux-headers-6.11.0-1009-raspi_6.11.0-1009.9+cbd1_arm64.deb sudo dpkg -i linux-image-6.11.0-1009-raspi_6.11.0-1009.9+cbd1_arm64.deb sudo dpkg -i linux-modules-6.11.0-1009-raspi_6.11.0-1009.9+cbd1_arm64.deb and they complete with no errors, but following reboot, 'uname -a' still reports 6.11.0-1010-raspi and not 6.11.0-1009-raspi as I assume it should. I note that the output to 'ubuntu@ubuntu:~/test_kernel$ sudo dpkg -i linux-image-6.11.0-1009-raspi_6.11.0-1009.9+cbd1_arm64.deb' indicated it was installing 1009 and then 1010... which looks suspicious (full output attached): update-initramfs: Generating /boot/initrd.img-6.11.0-1009-raspi Using DTB: bcm2711-rpi-cm4.dtb Installing /lib/firmware/6.11.0-1009-raspi/device-tree/broadcom/bcm2711-rpi-cm4.dtb into /boot/dtbs/6.11.0-1009-raspi/./bcm2711-rpi-cm4.dtb Taking backup of bcm2711-rpi-cm4.dtb. Installing new bcm2711-rpi-cm4.dtb. flash-kernel: deferring update (trigger activated) /etc/kernel/postinst.d/zz-flash-kernel: Using DTB: bcm2711-rpi-cm4.dtb Installing /lib/firmware/6.11.0-1009-raspi/device-tree/broadcom/bcm2711-rpi-cm4.dtb into /boot/dtbs/6.11.0-1009-raspi/./bcm2711-rpi-cm4.dtb Taking backup of bcm2711-rpi-cm4.dtb. Installing new bcm2711-rpi-cm4.dtb. flash-kernel: deferring update (trigger activated) Processing triggers for flash-kernel (3.107ubuntu13~24.10.2) ... Using DTB: bcm2711-rpi-cm4.dtb Installing /lib/firmware/6.11.0-1010-raspi/device-tree/broadcom/bcm2711-rpi-cm4.dtb into /boot/dtbs/6.11.0-1010-raspi/./bcm2711-rpi-cm4.dtb Taking backup of bcm2711-rpi-cm4.dtb. Installing new bcm2711-rpi-cm4.dtb. flash-kernel: installing version 6.11.0-1010-raspi -- 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: Triaged 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
