[opensuse-arm] Re: u-boot+EFI: how to debug grub2?

13.03.2016 14:30, Alexander Graf пишет:

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Am 13.03.2016 um 11:56 schrieb Matwey V. Kornilov :

Hello,

I am trying to boot on Phytec Wega board (TI AM33xx based) with u-boot+EFI+grub2 and just see

Booting `openSUSE-Tumbleweed-ARM-JeOS-wega [ VMX ]'

Loading linux.vmx... Loading initrd.vmx...

and then board is rebooted after some time (I think, by watchdog). I am sure that kernel console parameter is correct.

Before EFI was introduced to u-boot, I had booted this board successfully. Is there a simple way to somehow understand what is going wrong here?

My guess is that the device tree doesn't get loaded. Do you see a warning about it on serial? Try to add a line in grub2 to manually select the device tree:

Press e (edit current entry) at the end, add a new line saying "devicetree /boot/dtb/foo.dtb" Press ctrl-x (or f10) to boot

If that makes it work, the default U-Boot environment does not set the "fdtfile" variable. Add it to the env (in your board header) and you should be set :).

This doesn't help. There are also no any warnings, except gfxterm related. Environment size: 3985/131068 bytes => boot switch to partitions #0, OK mmc0 is current device Scanning mmc 0:1... 37937 bytes read in 71 ms (521.5 KiB/s) Found EFI removable media binary efi/boot/bootarm.efi reading efi/boot/bootarm.efi 461312 bytes read in 41 ms (10.7 MiB/s) ## Starting EFI application at 0x82000000 ... Scanning disks on usb... Scanning disks on mmc... Card did not respond to voltage select! MMC Device 2 not found MMC Device 3 not found Found 1 disks Welcome to GRUB! error: terminal `gfxterm' isn't found. error: no suitable video mode found. error: can't find command `terminal'. error: file `/boot/grub2/themes/openSUSE/ascii.pf2' not found. GNU GRUB version 2.02~beta3

Or do I misunderstand things and you're using the beaglebone image?

https://build.opensuse.org/project/monitor/home:matwey:pcm051:13.3

Alex

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