[Letux-kernel] LetuxOS: Kernel: m-latest 5.7-rc1 successful

H. Nikolaus Schaller hns at goldelico.com
Sat Apr 18 10:58:56 CEST 2020

Hi Stefan,

> Am 18.04.2020 um 09:48 schrieb Stefan Leichter <sle85276 at gmx.de>:
> Hello Nikolaus,
> The kernel dump I posted was from the kernel on your download page.
> My self-build kernel doesn't generate anything in /var/log folder.
> Therefore I assume the kernel still panics.
> I have no serial debugging option here (at least I don't know about any).

Well, I am working on a solution for that problem. I.e. a tiny adapter
for an USB cable that you can plug into the audio/tv-out socket of the

> To get the kernel source build I had to apply the attached patch on top
> of letux-5.7-rc1

Ok, I'll have to take a look for that.

> and the patch
> (https://patchwork.kernel.org/series/268431/mbox/). Maybe I screwed
> something up.

The biggest source of trouble with a self-built kernel may be
installation on the SD card. The complied .dtb files and modules
should also be installed to match the uImage.

Anyways, I have looked into the

> [   33.765747] WARNING: CPU: 0 PID: 2116 at drivers/base/dd.c:270 driver_deferred_probe_check_state+0x44/0x5c


The real reason is 

[   33.166473] omap3isp 480bc000.isp: deferred probe timeout, ignoring dependency

which means that something required by the image signal processor (camera
interface) inside the omap3 chip is not becoming available. May be some
clock or gpio.

Generally this should not be harmful and just make the GTA04 camera inoperational
(the OpenPandora hasn't one). But it may have unexpected side-effects.


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