Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

Messages - Jojo

Pages: 1 2 [3] 4 5 ... 13
Jojo, Ich habe keinen A10 zuhause. Daher kann ich da keine Portierungen machen und diese testen. Sorry.

Ich auch nicht :) . Ich dachte nur du wüßtest zufällig darüber Bescheid. Dann hätte ich ikeeki damit etwas unterstützen können.


Super! Klone mir grad die .97er Version :) .

Wie ist es mit der A10 Kompatibilität? Welches ist da der aktuellste Kernel oder kann ich den .97er dafür auch nehmen?


It will work,
But it took some time and tricks to get it working.
(see above)

As I understand the specs of your HDDs is will take up to 1A max (I think at spin-up). Please have a look here:


I am using two 2,5" HDDS in that constellation. But it took some time and tricks to get it working. For example I bypassed the current limiter IC for the USB port I attached the HDD to.
See here:

And I increased the voltage coming from my PSU. During startup, the two HDDs plus the board takes up to 3A. Writing operations on both HDDs at the same time also need >2A. So you will have a significant voltage drop on your cable. I increased my PSU output voltage to 5,35V. In worst case, only 5,05V really reach my board/the HDDs. With lower PSU voltage, the HDDs were not able to spin-on correctly.

But in general it is possible and not harmful ;) ...


oh, and you might beef up (or bypass as I did ;) ) the board fuse! It is a 2A SMD fuse, and bypassing that fuse decreases also the voltage drop and protects my CB from shutting down permanently ;) . But you have to keep in mind, that you lose some safety features by doing that!

Cubieboard v2 Hardware (A20 Based) / Re: USB Ports
« on: July 03, 2014, 03:43:37 am »
I know the Cubieboard v2 has 2 USB 2.0 ports on it, but upon further inspection of the board; it appears that it was designed to be able to fit 4 USB 2.0 ports.

How do you see that?! I doubt that. Looking at the schematic, it does not look like there would be a possibility for that.

And diogoc is right, you should use an USB hub. Even if you theoretically could add more USB ports, there are no safety components like for the normal two ports.


Tips, Tricks and Guides / Re: A20 (A10?) Temperature logging script
« on: June 26, 2014, 04:30:07 am »
Hello again,

I want to give an update/feedback about the last tests.

thank you for that link. I like the idea to have direct access to processor registers. Even if that requires a lot of reading datasheets, to be sure about what you are doind :) .

About the patch: I have been able to apply the stand-alone patch to some of my test-kernels. It worked like a charm! The previous problems were somewhere deep inside my old Linux Mint OS. I reinstalled it and compilation worked without any problems.

I have also found an updated version of the TP driver, which adds support for the temperature sensor. Found here:!searchin/linux-sunxi/touch/linux-sunxi/296dOr2MWM4/SIr2JijWhjUJ
 I tried to apply that patch in the same way as SSVB has described it a few posts ago, but that did not work. Sadly, I can not remember the error messages from the terminal at the moment. And the were in german  :-\ .
I think the problem could be, that the driver seems to be written for A10 devices. But how does the patch know, that I am running an A20  :o ?! Or is there another way to get the updated version of the driver working?


Beginners / Re: Help needed configuring 4TB drive as rootfs
« on: June 24, 2014, 03:38:58 pm »
Very good :) !
Congrats and thanks for sharing!

Beginners / Re: Help needed configuring 4TB drive as rootfs
« on: June 23, 2014, 05:14:03 pm »

correct me, if I am wrong, but if the HW specs of the CT are similar to those of CB1 and CB2 then 2TB could be maximum. Look here:

But I didn't try. Just an idea...


More screenshots:
  • invalid CPU
  • core choice (A20 only)
  • frequency choice
  • Error

Some screenshots:
  • Startup screen
  • Default table notification
  • A10 detected
  • A20 detected


after making some tests with overclocking or other CPU speed adjustments, I started to feel unhappy with the way to do it: entering the console, typing long commands and paths, etc... Also not every frequency worked properbly and you have to figure out, which one is available... complicated and not beautiful of course ;) .

So I wrote a script, that lets me choose which core's speed I want to change, and also gives me a list with more or less available frequencies, which are known to work.

NOTE 1: this is one of my very first scripts, so I don't garantee for anything  :-X ! Use it on your own risk!!!

For a basic GUI style, I used "dialog" (a program for basic grafical thing in the terminal). This has to be installed first!
Code: [Select]
sudo apt-get install dialog

The script needs to be started with "root" privileges, because the CPU frequency file it will be edited. After starting the script with
Code: [Select]
sudo bash
the script does:
  • look for the folder "/sys/devices/system/cpu/cpu0/cpufreq/"
    • if it does exist: go on...
    • if it does not exist: report and exit
  • look for "cpux" directories (which are the cores) in "/sys/devices/system/cpu/"
    • if there is only one (cpu0, A10 board) or two cores (cpu0 AND cpu1, A20 board): go on...
    • if there are >2 cores: report and cancel
  • giving a choice which core shall be adjusted (A20 board)
  • lists up available frequencies to make a choice from (see notes please)
  • setting the maximum core frequency to the chosen value ("/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq")

Note 2:
  • the script does NOT check of it is really a A10/A20 CPU. It just counts the directories (cores). Depending on the core count, it assumes the CPU type!!!
  • the default frequency table has been created by me after testing all available frequencies on MY CB2!!! The possible frequencies on your board may vary!
  • the clock speed change is NOT permanent!

oooops, what I have forgotten to explain:
  • Ja = Yes
  • Nein = No
  • Abbrechen = Cancel
The labels will be in your system default language ;) ...

Please try out and let me know your thoughts. If I get positiv feedback and/or some constructive critics, I might think about an improved release ;) .

The script is attatched  8) !


Irgendwie hat JoJo Ikeeki überredet, den 3.4.91 kernel von Igor in Aruntu 0.666 zu verwenden. Damit wird die Testbasis deutlich vergrößert!

Oder was ist dein Beitrag gewesen, damit dein Name in "aRUNTU 0.666 JOJO’S BIZARRE EDITION" auftaucht ?  ;D ;D ;D

WTF?!? Da weiß ich ja noch gar nichts von  :o ! Omfg, das bedeutet ja wieder Testes, was da Zeug hält...  8) .

Oh, peinlich! Hab ganz vergessen Liveplayer für die Tip und die Erklärungen zu danken  :-[ ... !
Also, hiermit HERZLICHEN DANK AN LIVEPLAYER! Ich werde berichten, ob/wenn ich was hingekriegt hab :) .

General Discussion / Re: I think i blew my cubie, please help
« on: June 14, 2014, 06:20:01 pm »

that sounds not so good :( . Kind of worst case...

If you take a look into the schematic, you see that there are several things which are directly supplied by the 5V rail. You might have blown up the ethernet IC, the HDMI IC and maybe (surely) other things. The PMU IC might have survived, and with him the CPU. But I belive that it is not worth to repair it, sorry.

Please take a look on the schematic to get an idea of what is potentionally dead  :-\ .


Deutsch / Re: Kernel-Basteleien jenseits von 3.4.75
« on: June 11, 2014, 06:16:24 am »
Fast alle kernels .79 sind von Patwood erstellt worden. Vieleicht fragst du den mal mit einer pm?

Ja, stimmt, das könnte ich mal machen. Aber es hat mich eben so gewurmt, daß ich dachte eine tolle Idee gehabt zu haben, und dann hat es nicht funktioniert  :'( .

Ich muß noch viel lernen ;) ...

Pages: 1 2 [3] 4 5 ... 13