<div dir="ltr"><div class="gmail-_3xX726aBn29LDbsDtzr_6E gmail-_1Ap4F5maDtT1E1YuCiaO0r gmail-D3IL3FD0RFy_mkKLPwL4" style="max-width:800px"><div class="gmail-_292iotee39Lmt0MkQZ2hPV gmail-RichTextJSON-root">Hello.I've installed the ubuntu jammy iso image created by "hexdump0815" to my sd card because I wanted to install a recent ubuntu distro powered by the mainline kernel. This is the kernel of the iso file : <a href="https://github.com/hexdump0815/imagebuilder/releases/download/220619-01/chromebook_snow-armv7l-jammy.img.gz" class="gmail-_3t5uN8xUmg0TOwRCOGQEcU" rel="noopener nofollow ugc" target="_blank">https://github.com/hexdump0815/imagebuilder/releases/download/220619-01/chromebook_snow-armv7l-jammy.img.gz</a> So,now,I'm going to explain what's the content of the partitions on the sd card. <blockquote class="gmail-_28lDeogZhLGXvE95QRPeDL"><ol class="gmail-_1eJr7K139jnMstd4HajqYP"><li class="gmail-_3gqTEjt4x9UIIpWiro7YXz">/dev/sdh1 = unknown = 16 MB</li><li class="gmail-_3gqTEjt4x9UIIpWiro7YXz">/dev/sdh2 = unknown = 16 MB</li><li class="gmail-_3gqTEjt4x9UIIpWiro7YXz">/dev/sdh3 = ext2 = BOOT</li></ol></blockquote> Inside the partition /dev/sdh3 I have : <blockquote class="gmail-_28lDeogZhLGXvE95QRPeDL">a) dtb-5.18.1-stb-cbe+ = directoryb) extlinux = directoryc) extra = directoryd) config.5.18.1-stb-cbe+ : filee) initrd.img-5.18.1-stb-cbe+ : filef) System.map-5.18.1-stb-cbe+ : fileg) vmlinux.kpart-5.18.1-stb-cbe+ : fileh) zImage-5.18.1-stb.cbe+ : file</blockquote> Inside the directory "dtb-5.18.1-stb-cbe+" there are the following files : <blockquote class="gmail-_28lDeogZhLGXvE95QRPeDL">a) exynos5250-snow.dtbb) exynos5250-snow-rev5.dtbc) exynos5250-spring.dtb</blockquote> Inside the directory "extlinux",there is the file called extlinux.conf that has the following content : <pre class="gmail-_3GnarIQX9tD_qsgXkfSDz1"><code class="gmail-_34q3PgLsx9zIU5BiSOjFoM">TIMEOUT 30 DEFAULT linux-snow-rev4 MENU TITLE snow chromebook boot options # rev4 snow chromebook LABEL linux-snow-rev4 MENU LABEL linux rev4 snow LINUX ../zImage-5.18.1-stb-cbe+ INITRD ../initrd.img-5.18.1-stb-cbe+ FDT ../dtb-5.18.1-stb-cbe+/exynos5250-snow.dtb APPEND console=tty1 root=LABEL=rootpart ro rootwait net.ifnames=0 ipv6.disable=1 fsck.repair=yes noresume # rev5 snow chromebook LABEL linux-snow-rev5 MENU LABEL linux rev5 snow LINUX ../zImage-5.18.1-stb-cbe+ INITRD ../initrd.img-5.18.1-stb-cbe+ FDT ../dtb-5.18.1-stb-cbe+/exynos5250-snow-rev5.dtb APPEND console=tty1 root=LABEL=rootpart ro rootwait net.ifnames=0 ipv6.disable=1 fsck.repair=yes noresume # spring chromebook - untested LABEL linux-spring MENU LABEL linux spring LINUX ../zImage-5.18.1-stb-cbe+ INITRD ../initrd.img-5.18.1-stb-cbe+ # rev4 snow chromebook FDT ../dtb-5.18.1-stb-cbe+/exynos5250-spring.dtb APPEND console=tty1 root=LABEL=rootpart ro rootwait net.ifnames=0 ipv6.disable=1 fsck.repair=yes noresume </code></pre> Inside the extra directory there are the following files : <blockquote class="gmail-_28lDeogZhLGXvE95QRPeDL">a) kernel-chromebook_snow-legacy.tar.gzb) uboot.kpart.cbe-snowc) uboot.kpart.cbe-snow-alternatived) uboot.kpart.cbe-spring</blockquote> 4) /dev/sdh4 : inside here I have copied all the files of the jammy userland prepared by hexdump0818. That's all. What I want to know is which method he used to boot Ubuntu like this ? I don't see grub.cfg and I don't see u-boot. So what method has hexdump0818 used ? I want to know this because my plan is to enable KVM on the kernel 5.4 and to do this I need to install a not verified u-boot bootloader on the first partition of the sd card that I should chain u-boot with something. And I should understand what this something is.</div></div>-- <div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature">Mario. </div></div>