[Letux-kernel] LetuxOS: Replicant for GTA04

H. Nikolaus Schaller hns at goldelico.com
Sun Oct 25 10:05:36 CET 2020

Hi folks,

> Am 22.10.2020 um 18:04 schrieb Lukas Maerdian <luk at slyon.de>:
> Hi Nikolaus,
> Am 20.10.20 um 20:31 schrieb H. Nikolaus Schaller:
>> The status of my tests is:
>> Kernel 4.14.202 boots up to the Replicant logo and then stucks.
>> Kernel 4.19.152 writes ANDROID to the framebuffer but then reboots - this kernel should already support the GTA04A5 if I remember correctly.
>> Kernel 5.4.72 panics somewhere in omapdrm.
>> Kernel 5.9.1 drivers/staging/android/logger.c does not compile (problems with struct timespec).
>> So there is some progress and potentially fixable issues.
>> The most important one is that I do not know how to debug that there
>> is no progress after the Replicant logo with 4.14 kernel. There is
>> no console message, processes are running but nothing visible happens.
>> Touch remains inactive. Console shell works.
>> Ideas? Suggestions?
> Uhh... I remember something like this from a few years ago.
> Unfortunately, I can't remember how I fixed it back then.
> IIRC it was somehow related to a missing driver, I think it was omapdrm or panel related :-/ I think I got it somehow solved by loading all the required modules (and dependencies!) manually via load_modules.sh

I have some progress in analysing the situation.

1. I did test on a GTA04A4 where the Modem is broken

2. GTA04A5 works with the kernel which is part of the image

DEV=/dev/sdb makesd replicant -r https://download.goldelico.com/gta04-replicant/4.2/20170423-kernel-4.10-replicant.tbz

3. if I install the binary kernel from https://download.goldelico.com/gta04-kernel/letux-4.10.5-replicant in addition

EV=/dev/sdb makesd replicant -r https://download.goldelico.com/gta04-replicant/4.2/20170423-kernel-4.10-replicant.tbz -kboot https://download.goldelico.com/gta04-kernel/letux-4.10.5-replicant/uImage -dboot https://download.goldelico.com/gta04-kernel/letux-4.10.5-replicant/device-trees.tbz -m https://download.goldelico.com/gta04-kernel/letux-4.10.5-replicant/modules.tgz 

it also works.

4. if I checkout letux-4.10.y-replicant and run my build script the result hangs

So there is some subtle difference between https://download.goldelico.com/gta04-kernel/letux-4.10.5-replicant
and a fresh build.

Maybe a CONFIG or the way the kernel modules are built.

But having a working and a non-working setup with not too much differences
allows to inspect the diffs...


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