[Tinkerphones] No video on Pandora after letux kernel boot

[H. Nikolaus Schaller]

Hi Grond,


> Am 25.11.2021 um 01:16 schrieb Grond <grond66 at riseup.net>:
> 
> On Sat, Nov 20, 2021 at 10:48:41AM +0100, H. Nikolaus Schaller wrote:
>> Hi Grond,
>> 
>>> Am 19.11.2021 um 23:36 schrieb Grond <grond66 at riseup.net>:
>>> 
>>> 
>>> Hi.
>>> 
>>> Having recently encountered a slew of software incompatibility issues on
>>> my Pandora related to it's ancient (3.2) kernel, I thought I give the
>>> letux kernel a try as I'd heard it could at least boot on the Pandora.
>> 
>> Yes, just tested yesterday...
>> But with some Letux OS Debian.
>> 
>> What I do not know if it boots well with the original OS.
>> 
> 
> Hmm. That's odd. I was able to get kernels to boot (both the ones that
> came from the makesd script and my own custom-built ones), but the only
> way I was able to tell that anything was running was the heartbeat LED
> flashing. The LCD screen was never initialized.

Some ideas:
- use letux_defconfig (omap2plus_defconfig is incomplete)
- kernel may not find the modules in /lib/modules

> I've ordered a Pandora
> serial adapter to try and debug the problem, but in the meantime, what
> kernel did you get to boot? I built and tried letux-5.4.160
> (7c7255c3463641b8f699472f9114b0435dbfe707) and whichever 5.4.160 kernel
> is currently installed via makesd (probably the same git revision).

I just did build 5.4.161 (13796081373dda954bb3bb59403fc70708cbbcff).

It gets stuck for ca. 20 seconds and later reports a NULL pointer issue in
the pvrsrvkm. But after a minute I get a display.

Maybe you can try 5.15.y? There, the pvrsrvkm issue is solved.

But there is a known bug with the bandgap sensor inside the omap3530 (600 MHz).
And something about an I2C bus timeout which hasn't been seen on dm3730 (1 GHz)
based devices. 

> 
>>> 
>>> Unfortunately, it seems that there is something wrong with the git
>>> server HTTP(S) server instance running on git.goldelico.com. I've tried
>>> both cloning the repo from the URL given on the project page
>>> (https://git.goldelico.com/letux-kernel.git) and adding it as a remote
>>> to my existing kernel source trees. In both cases it gets stuck with the
>>> message "Fetching objects: 2" printed to the terminal, and never
>>> completes, even after an hour or two (though it does continue to consume
>>> bandwidth the whole time).
>> 
>>> 
>>> I have managed to download the letux kernel source from both the github
>>> mirror and over git protocol via git://git.goldelico.com/gta04-kernel.git
>>> without issues (although I have also encountered similar problems with
>>> downloading from the later source in the past). But I thought I'd send a
>>> problem report to this mailing list, as I suspect that the maintainer(s)
>>> of git.goldelico.com are subscribed and might not have encountered this
>>> issue before.
>> 
>> Well, this is more or less expected. The git repo has grown to almost 3GB
>> and the server has a 10 MBit/s connection - and serves other things as well.
>> 
>> So it takes at least 40 minutes to fetch all the raw files through http
>> before git starts to do something. An upgrade to 40 MBit/s is planned to
>> come soon.

The upgrade happened on this monday so speed should be higher now.

BR,
Nikolaus