树莓派论坛提到
https://forums.raspberrypi.com/viewtopic.php?t=361383
升级方法
Tue Dec 12, 2023 5:44 pm
3B+ v1.4 has a new PMIC and needs Sept 2021 or newer firmware.
Follow https://pip.raspberrypi.com/categories/ ... 6-WP-1.pdf to update the firmware in your image.树莓派更换了新的PMIC(电源管理芯片)
https://pip.raspberrypi.com/categories/685/documents/RP-003476-WP/RP-003476-WP-1.pdf
该PDF有说明最新固件情况
Updating only the firmware
Sometimes, going through the standard upgrade procedure may not be possible. For example, you may have acustomised distribution with no update facilities, or that cannot be upgraded without causing further issues. In thesecircumstances, and possibly others, you will need to update the firmware files in the distribution manually.You can download the firmware files from the following location:
https://github.com/raspberrypi/firmware/archive/refs/heads/stable.zip
This zip file contains a number of items, but the ones we are interested in at this stage are in the boot folder.
The firmwarefiles have names of the form
start*.elf, and their associated support files are fixup*.dat.
The basic principle is to copy the required start and fixup files from this zip file to replace the same named files in thedestination OS image.
The exact process will depend on how the OS has been set up, but this is an example of how itwould be done for a Raspberry Pi OS image:
1. Extract or open the zip file so you can access the required files.
2. Open up the boot folder in the destination OS image (this could be on an SD card, or a disk-based copy).
3. Determine which start.elf and fixup.dat files are present in the destination OS image.
4. Copy those files from the zip archive to the destination image.The image should now be ready for use on the latest Raspberry Pi Ltd hardware.
其实就是下载最新固件包 在压缩包里打开boot目录
替换start*.elf 和 fixup*.dat.
当然命令行系统 用的是start.elf fixup.dat
桌面系统用的是 start_x.elf fixup_x.dat