Failure to boot after upgrading R-01 OS about devterm

[cuu]

sorry to hear that
but R01 use the devel branch of ubuntu(because we had to , for latest mesa to work with)

it has risks to upgrade, according your feed back ,it seems that the kernel has been misplaced

so mount the sd card(with R01 os) on a PC (like Linux )

then go into the boot partition of the sd card

you will see

extlinux.conf  
extlinux.conf.cpi.bak  

replace extlinux.conf with extlinux.conf.cpi.bak

the extlinux.conf.cpi.bak is for this kind of situation

the apt upgrade will mess up the content of exlinux.conf

[thomasdstewart]

The official image leaves the Ubuntu RISC V kernels installed and after they get upgraded u-boot-update runs, which overwrites the extlinux.conf. Much like on a x86 system installing a new kernel updates the grub config file. The u-boot-update run makes a guess at which kernels you want to use, makes a menu to let you pick them all (you don't see the menu unless you see u-boot output in the debug uart) of course it assumes you want the latest version of linux, which does not boot. If you look at the content of the extlinux.conf after a u-boot-update run and the extlinux.conf.cpi.bak you can see they are completely different, as u-boot does not know about any of the custom allwinner d1 options. Probably the best quick option is setting that U_BOOT_UPDATE=false. The correct way would be to package the devterm r-01 kernel properly and understand how to integrate with u-boot-update more gracefully.

[jw-0]

Thanks this worked, appreciate it

[nzmichaelh]

FWIW, /boot/exlinux/extlinux.conf is updated by u-boot-update. It looks like you can turn off automatic updating by adding U_BOOT_UPDATE=false to /etc/default/u-boot.

[cuu]

FWIW, /boot/exlinux/extlinux.conf is updated by u-boot-update. It looks like you can turn off automatic updating by adding U_BOOT_UPDATE=false to /etc/default/u-boot.

great!

[andypiper]

Could you say more about the Mesa issue, please? I'd like to be able to install libsdl2-dev but that seems to have a conflict caused by the version of Mesa (or something else in the graphics stack).

What's the specific change to extlinux.conf that causes the boot failure?