On Sun, Nov 7, 2021 at 5:07 PM Joe Ayers <[email protected]> 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
I went looking and found that this commit is in all releases starting with 17.01.x, but not in v15.05.1 > > 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 This one is in releases starting with v19.07.x, but not in v18.06.x and earlier. _______________________________________________ openwrt-devel mailing list [email protected] https://lists.openwrt.org/mailman/listinfo/openwrt-devel
