[Gta04-ubuntu-touch] [Tinkerphones] GTA04: TV-out working again!

H. Nikolaus Schaller hns at goldelico.com
Sun Jun 3 11:33:34 CEST 2018

Hi Jonatan,

> Am 03.06.2018 um 09:23 schrieb Jonatan Hatakeyama Zeidler <jonatan_zeidler at gmx.de>:
> Hi,
> we just started a community project¹ to bring Ubuntu Touch to the Raspberry Pi to enable people to build their own fully featured phones. If we succeed, it may be not that difficult anymore to bring Ubuntu Touch to tinkerphones, too. So both communities could combine their efforts, ubports on the software side and tinkerphones on the hardware side.

Regarding hardware, there is also the zero phone: https://wiki.zerophone.org

> What do you guys think about that?

That is a really interesting idea full in line with our overall goals. There was
some interest 2 years ago, and we already had installed a mailing list:


But it remained almost inactive. So let me invite you to just make use of it.
Your initiative can make the ball rolling again.

Let me ask some question that come to my (naive) mind:
* how does ubuntu touch differ from desktop ubuntu?
* do they share apt-get repositories?
* how is it installed? does a "apt-get install ubuntu-touch" suffice?
* what are minimum requirements to memory, screen resolution?

> regards,
> Jonatan
> ¹https://github.com/ubports/raspberry-pi


> Am 01.06.2018 um 23:04 schrieb H. Nikolaus Schaller:
>> Hi,
>> although there seems to be not much activity here, there is still progress
>> with the Letux OS / GTA04 code base. It is neither forgotten nor abandoned :)
>> I have finally made the TV-out of the GTA04 work again. It did already work long
>> time ago (I think in 3.12 kernel), but after upgrades to Device Tree we were not
>> able to catch up with upstream changes and understand them. And to be honest,
>> TV-out was not on highest priority.
>> But now I spent some hours and made it working again. Mainly there were typos
>> in the DT sources we had tried before. E.g.:
>>>>> &control_devconf1 {
>>>>> 	pinctrl-name = "default";
>>> ^^^ here is the bug: this property must be called "pinctrl-names".
>> And after finally recognizing that the video cable was broken overnight
>> (it was still working yesterday) and adding some "ti,invert-polarity;" the
>> TVout of the GTA04 works again :)
>> Quality isn't bad - so switching to a desktop mode (and taking care of
>> portrait vs. landscape dimensions) is just a matter of easy-to-use
>> user-space software...
>> So by connecting to a projector or monitor and adding a keyboard through
>> USB-OTG or Bluetooth you can easily convert your smart-phone into a desktop
>> PC with standard Debian inside...
>> There is no longer an excuse that there is no hardware capable of this...
>> Kernel and DT and hardware now finally support it. Please note that
>> I have "backported" the fixes also to the latest 4.16.13 kernel because the
>> 4.17-rc kernels have some other spurious bug on the GTA04A5 boards
>> we have not yet fixed.
>> So please dig out your GTA04 and give it a try!
>> For downloads see: http://projects.goldelico.com/p/gta04-kernel/
>> And, please consider donating to support further work on Letux OS,
>> especially if you want faster progress or new features:
>> 	http://shop.goldelico.com/wiki.php?page=Product&product=9602
>> As you can see nobody is getting rich so that you can imagine that
>> we do this almost voluntarily:
>> 	http://shop.goldelico.com/wiki.php?page=GTA04%3ADonation
>> So unless we get big donations to hire professionals, we need volunteers
>> or continue in slow pace.
>> Finally, here is a photo (well, I should have initialized the real time clock before :)
>> <DSC00922.jpeg>
>> BR and have fun,
>> Nikolaus
>> _______________________________________________
>> Community mailing list
>> Community at tinkerphones.org
>> http://lists.goldelico.com/mailman/listinfo.cgi/community
>> http://www.tinkerphones.org
> _______________________________________________
> Community mailing list
> Community at tinkerphones.org
> http://lists.goldelico.com/mailman/listinfo.cgi/community
> http://www.tinkerphones.org

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