Public bug reported: The new CM4 (2021), which has UKCA sign on the board, here is its cpuinfo : Hardware : BCM2835 Revision : b03141 Model : Raspberry Pi Compute Module 4 Rev 1.1
Once it is connected to internet, the security patch creates in /boot lrwxrwxrwx 1 root root 43 Oct 12 14:31 dtb-5.4.0-1071-raspi -> dtbs/5.4.0-1071-raspi/./bcm2711-rpi-4-b.dtb At the same time, in /boot/firmware, all .elf files and .dat files are backed up and replaced. The new files make the next boot crash. If we connect it to screen, it shows that the cm4 needs new software to boot. The fix from our side is to mount as usb disk and replace all .elf and .dat files by the latest here : https://github.com/raspberrypi/firmware/tree/master/boot and then it can boot again. On CM4 (2020) this security patch doesn't crash on boot. Revision : b03140 Model : Raspberry Pi Compute Module 4 Rev 1.0 Here is the product change note : https://pip.raspberrypi.com/categories/645 This bug seems to be introduced before, the 1070 patch cause the same boot problem already. ** Affects: linux-raspi (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-raspi in Ubuntu. https://bugs.launchpad.net/bugs/1992671 Title: cm4 2021 version failed to boot on 20.04 Status in linux-raspi package in Ubuntu: New Bug description: The new CM4 (2021), which has UKCA sign on the board, here is its cpuinfo : Hardware : BCM2835 Revision : b03141 Model : Raspberry Pi Compute Module 4 Rev 1.1 Once it is connected to internet, the security patch creates in /boot lrwxrwxrwx 1 root root 43 Oct 12 14:31 dtb-5.4.0-1071-raspi -> dtbs/5.4.0-1071-raspi/./bcm2711-rpi-4-b.dtb At the same time, in /boot/firmware, all .elf files and .dat files are backed up and replaced. The new files make the next boot crash. If we connect it to screen, it shows that the cm4 needs new software to boot. The fix from our side is to mount as usb disk and replace all .elf and .dat files by the latest here : https://github.com/raspberrypi/firmware/tree/master/boot and then it can boot again. On CM4 (2020) this security patch doesn't crash on boot. Revision : b03140 Model : Raspberry Pi Compute Module 4 Rev 1.0 Here is the product change note : https://pip.raspberrypi.com/categories/645 This bug seems to be introduced before, the 1070 patch cause the same boot problem already. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-raspi/+bug/1992671/+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
