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Author: BryanFRitt

Directions for Heat Sink?

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Post time 2015-12-8 22:39:20 | Show all posts
I don' t use the kernel by @loboris.
Test was done with u-boot binary and uImage provided by @ssvb on opi plus.
Restested with 600 Mhz and this time it failed at loop 1/8:
Bit Flip            : testing 111READ FAILURE: 0xffffdfff != 0xffffffff at offset 0x0054a294 (bitflip)

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Post time 2015-12-9 17:33:21 | Show all posts
fritz replied at 2015-12-8 22:39
I don' t use the kernel by @loboris.
Test was done with u-boot binary and uImage provided by @ssvb o ...

Seems to be related to DRAM initialisation in the early boot stage: https://groups.google.com/d/msg/ ... 4k8nIE/PKkl7cwUAQAJ

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Post time 2015-12-9 18:19:25 From the mobile phone | Show all posts
Edited by dvl36 at 2015-12-9 18:29
bronco replied at 2015-12-8 21:20
I don't know whether heatsink temperature is relevant here at all. As far as I understand the lima ...

@ssvb at linux-sunxi Google groups:
-----
Currently U-Boot v2016.01-rc2 fails the lima-memtester check unless
the DRAM clock speed is reduced to 456 MHz on my Orange Pi PC. But
if I use the boot0 bootloader to boot the same kernel image
(uImage-3.4-sun8i-h3-lima-memtester), then the test works fine.
This means that there must be still something wrong with the H3
DRAM init code in U-Boot, or maybe some clocks are wrong
------

How we can test it using boot0 bootloader?


Post time 2015-12-9 19:10:49 | Show all posts
I would suspect by using any of the 'legacy' images and exchanging uImage and providing the initramfs -- see below why.
Might be necessary that you check out his branch. You could then use a different target (sun8i_h3_defconfig instead of sun8i_h3_lima_memtester_defconfig) to get a normal uImage + modules to be used.

  1. root@opennms:/var/git/H3/linux-sunxi/arch/arm/configs# diff sun8i_h3_*
  2. 2a3
  3. > CONFIG_KERNEL_LZMA=y
  4. 18a20
  5. > CONFIG_INITRAMFS_SOURCE="initramfs/rootfs.cpio.lzma"
Copy the Code


Then you should be able to use the lima-memtester binary within your normal distro since in ssvb's kernel the Mali stuff works. BTW: I could use all the H3 stuff available the last days here and there also with the A83T the so called "Banana Pi M3" uses. The fixes to use more recent GCC versions and backports of zsram work also with the A83T "SDK"/BSP: http://pastebin.com/xvJ04Pi2

That's good news for customers that were unfortunate enough to buy a Banana Pi M3 since this means chances are great that they could benefit from the 'H3 community' since their vendor is pretty clueless (comparable to the situation here with Xunlong the first months and then the community taking over)

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Post time 2015-12-10 04:39:25 | Show all posts
bronco replied at 2015-12-9 10:33
Seems to be related to DRAM initialisation in the early boot stage: https://groups.google.com/d/ms ...

OK seems fixed now.
With latest patch 672Mhz is OK, test passed.


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Post time 2015-12-10 18:17:56 | Show all posts
Edited by dvl36 at 2015-12-10 21:04
fritz replied at 2015-12-10 04:39
OK seems fixed now.
With latest patch 672Mhz is OK, test passed.

696Mhz - passed.  720Mhz  passed OK.
744Mhz failed after 2 min.
P.S. Using fel-boot-lima-memtester-on-orange-pi-pc-v3
ADD: Covered by small cardboard box OPI PC still running with 720Mhz DRAM frequency.


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Post time 2015-12-19 00:27:36 | Show all posts
I managed to mount a heat sink and a fan into the transparent acrylic case for the Orange Pi PC. It took some drilling (which is not the best looking) but it works. I connected the fan to 3.3V (pins 1 and 6 on the GPIO) so the fan is a bit more silent.I still have to do some measurements  of the temperature under load...
C:\Users\simon\Documents\OrangePi\SlikeHladilnik\IMG_20151211_212435.jpg

C:\Users\simon\Documents\OrangePi\SlikeHladilnik\IMG_20151211_212450.jpg



C:\Users\simon\Documents\OrangePi\SlikeHladilnik\IMG_20151218_170046.jpg


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Post time 2015-12-19 02:53:45 | Show all posts
baltazar replied at 2015-12-19 00:27
I managed to mount a heat sink and a fan into the transparent acrylic case for the Orange Pi PC. It  ...

Do you really like a noisy fan? Why not both stop overvolting/overclocking and the fan?

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Post time 2015-12-19 22:03:43 | Show all posts
Yeah, there is no need for fan or heatsink, if you apply @bronco's sane voltage/frequency settings.

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Post time 2015-12-21 02:29:31 | Show all posts
Edited by dvl36 at 2015-12-21 08:44
bronco replied at 2015-12-19 02:53
Do you really like a noisy fan? Why not both stop overvolting/overclocking and the fan?

Liquid cooling would be the best.

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