hexdump0815/imagebuilder

chromebook_veyron: problem: Veyron to emmc installation: partitioning problem on Medion S2015

techorix opened this issue · 2 comments

techorix commented

I followed the guide on how to install to emmc here https://github.com/hexdump0815/imagebuilder/blob/main/doc/install-to-emmc-on-arm-chromebooks.md but ran into problems witth the partitioning. Several devices simply could not be created so I had to recover the original chrome OS.

Here is the partition table from fdisk -l that I got working at the moment:

Disk /dev/mmcblk0: 14.68 GiB, 15758000128 bytes, 30777344 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 29F80876-EA43-124F-9630-7C9013CB0602

Device            Start      End  Sectors  Size Type
/dev/mmcblk0p1  8704000 30777295 22073296 10.5G Linux filesystem
/dev/mmcblk0p2    20480    53247    32768   16M ChromeOS kernel
/dev/mmcblk0p3  4509696  8703999  4194304    2G ChromeOS root fs
/dev/mmcblk0p4    53248    86015    32768   16M ChromeOS kernel
/dev/mmcblk0p5   315392  4509695  4194304    2G ChromeOS root fs
/dev/mmcblk0p6    16448    16448        1  512B ChromeOS kernel
/dev/mmcblk0p7    16449    16449        1  512B ChromeOS root fs
/dev/mmcblk0p8    86016   118783    32768   16M Linux filesystem
/dev/mmcblk0p9    16450    16450        1  512B ChromeOS reserved
/dev/mmcblk0p10   16451    16451        1  512B ChromeOS reserved
/dev/mmcblk0p11      64    16447    16384    8M unknown
/dev/mmcblk0p12  249856   315391    65536   32M EFI System

Partition table entries are not in disk order.


Disk /dev/mmcblk0boot0: 4 MiB, 4194304 bytes, 8192 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mmcblk0boot1: 4 MiB, 4194304 bytes, 8192 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

As I have no idea how I should modify the sgdisk or cgpt cIommands accordingly, I was hoping, maybe the information above can help you recommend something to me. Maybe I should only delete certain partitions and write the kernels to the original kernel partitions p2, p4, p6?

hexdump0815 commented

it might be related to the problems described in the below issues and links - maybe have a look at them and see if anything of that helps - in general it should work on the medion s2015 as i have one myself and linux is running fine on it on emmc.

here is some background about why the partitioning is so complicated on veyron:
https://www.osfc.io/2023/talks/when-boot-security-goes-wrong-the-story-of-the-ignoreme-gpt/

techorix commented

Downgrading cgpt did the trick. It still felt a bit flaky due to all these error messages and warnings but worked like a charm, after all. Am very happy now. Thanks :)

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