postmarketOS

landrover a9

Contributors

• alexlep

Random information

• Obscure phone:

  This is just another clone from millions of devices from Chinese manufacturers.

• MT6582 CPU
• Product code F090_GPS_KK

Status

• a boot.img file with kernel, initramfs and dtb file from pmOS does not work.
• alexlep has a boot.img file from the vendor somewhere (extracted from the device?), that works when flashed via fastboot boot. It can not be extracted like a normal boot.img file, as reported on IRC. Probably the extraction tool can't handle the files.
• according to alexlep, there is a 512b header in front of the kernel and initramfs:

  ramdisk and kernel has 512 bytes added in the beginning of the files

  custom header with file description

• ...and simply prepending that header in front of a custom initramfs/kernel does not work, as he reports.

extracted boot.img, first bytes of pmOS initramfs (not working):

sp@sppc:~/else/pmbs_work/chroot_native/pmos/extracted$ xxd -l 50 ramdisk
00000000: 1f8b 0800 0000 0000 0203 949a 0d70 1ce5  .............p..
00000010: 79c7 5fb0 09b2 621b 411d ac16 0317 c7a1  y._...b.A.......
00000020: 0ed8 d6d9 96b1 2026 11b5 70d4 5814 4344 ...... &..p.X.CD
00000030: ea49                                     .I

extracted boot.img, first bytes of the vendor's initramfs (working):

sp@sppc:~/else/pmbs_work/chroot_native/olololo/extracted$ xxd -l 50 ramdisk
00000000: 8816 8858 f5a7 0c00 524f 4f54 4653 0000  ...X....ROOTFS..
00000010: 0000 0000 0000 0000 0000 0000 0000 0000  ................
00000020: 0000 0000 0000 0000 ffff ffff ffff ffff  ................
00000030: ffff

Links

• #73 lists lots of issues with the device, and additional information, such as fastboot's partitions output
• This might be the same phone?