On 08/11/21 02:04, Joe Ayers wrote:
Openwrt Github commit notes, Forum posts, and Documentation, refer to: "The mtd partitions layout for XM-type devices changed from AirOS v5.5 to AirOS v5.6. Before installing OpenWrt, downgrade first to AirOS 5.5." reference: https://openwrt.org/toh/ubiquiti/common While the documentation is a path to succeed loading openwrt firmware, this commit fixed the soft-brick issue (soft-brick meaning tftp recovery with serial cable is possible): https://github.com/openwrt/openwrt/commit/076d58d3440f382c536ea8874f58b0df23c263bc It is a key message, that openwrt firmware after this commit, will no longer soft-brick the device, not communicated. The key misunderstanding is around the root cause due to Ubiquiti tightening up uboot to further check partition sizes. The root cause was identified as a bad openwrt size definition that older versions of uboot accepted, without end user awareness. The reason I raise this issue is due to users in the https//www.arednmesh.org community struggling to downgrade to AirOX v5.5, and we spend time working with them only to do tftp "hold-reset-button" firmware loads to succeed as quickest path. Note, however, there are still issues where newer Uboot versions expect images to have particular naming conventions, which are also addressed in later fixes: https://github.com/openwrt/openwrt/commit/6009b3fd586a1fd91400074080afb9545c6cf7e2 Thus, firmware before this time will not tftp "hold-reset-button" load due to this 2nd issue, but not soft-brick the device. I've not found the time to track down how to contact the relevant stakeholders to address this issue in the documentation, consequently, blasting out in this list in hopes of triggering someone to update the relevant openwrt documentation to add more clarity to the issue.
The documentation is a wiki and it can be edited by anyone that has registered an account. If you know enough about these particular devices and want to edit that page to update the information, please contact me (at this email) or tmomas (at [email protected]) in private to get an account, or go through the forum.
See the forum thread here about the "new" manual registration of new accounts in the wiki
https://forum.openwrt.org/t/applying-for-openwrt-wiki-account/101671 -Alberto _______________________________________________ openwrt-devel mailing list [email protected] https://lists.openwrt.org/mailman/listinfo/openwrt-devel
