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Riku Voipio
Works at Linaro
Lives in Kirkkonummi
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Riku Voipio

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Fastest way to change running dtb
Tollef posted about using BeagleBone Black for temperature monitoring . There was a passage about patching the DTB (device tree) file: ... This needs to be compiled into a .dtb. I found the easiest way was just to drop the patched .dts into an unpacked kern...
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NVMe looks like step into right direction. However, looking at the linux nvme driver, it seems NVMe exposes a just dumb block device. The blocks are of course stored to an undocumented filesystem implemented by proprietary firmware.

Of course the vendors prefer this way. Dumb interface lets vendors add value" on top of the bulk NAND flash by creating a slightly better write distribution algorithm than competitors - never mind the bugs in corner cases outside NTFS usecases...
 
This is the first time I see NVMe in a consumer product, hopefully it will replace AHCI based SSDs in all new products soon.

+Arnd Bergmann 
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Vladimir Pantelic's profile photoZygmunt Krynicki's profile photo
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Serial port IIRC
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Full room listening to +David Greaves talking​ about installing #sailfishos on android devices. #FOSDEM15
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Just in time for christmas
 
F21 final for AArch64 is out!
Announcing Fedora 21 for AArch64! Paul Whalen pwhalen at redhat.com. Wed Dec 17 21:47:06 UTC 2014. Previous message: Fedora 21 for Power Now Available; Next message: Fedora 21 for IBM System z release; Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] ...
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Riku Voipio's profile photoMarcin “hrw” Juszkiewicz's profile photo

Riku Voipio

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gcompris is cool, but indeed needs badly better and more uniform graphics. This crowdfunder intends fix that
 
For those who don't know it, +GCompris is probably the best educational free software, with around 140 activities for kids aged 2 to 10. And since the more than 10 years of its existence, it has always been released under the GPL. I personally know very well its main developer, +Bruno Coudoin, and he is fully committed to the free software principles.

Since several months, Bruno and other contributors have started a huge effort of rewriting GCompris in Qt/QML, in order to provide an Android version, which is already available for beta testers.

Now, they have started an Indiegogo crowdfunding campaign to vastly improve the graphic design in GCompris, see https://www.indiegogo.com/projects/new-unified-graphics-for-gcompris/x/9327724. The idea is to raise $25k in order to pay a professional graphic designer to create more consistent graphics accross the entire GCompris software. And of course, all graphic designs will be released under a free license!

So I would strongly encourage you to contribute to this crowdfunding campaign, and make sure that the free software world continues to have a best-in-class educational application for our kids!
Help us bring new improved and unified graphics to GCompris, the widely used educational software...
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Ohh I never realised this existed. It's about time my 3 year old started learning about the keyboard ;-)
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Riku Voipio

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A different kind of driving game - also check their homepage :) http://www.johannesrojola.com/msc/index.html
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One for +Matt Hart to try?
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100 years ago, tractors emulating horses, today SSD emulating hard drives. 
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Juha Hietapakka's profile photoDina Solveig Jalkanen's profile photoSeppo Pirttijärvi's profile photoAntti V Kantola's profile photo
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+Manne Teh Jonne Jos pahvi on puristettu MDF.si ... on se kovempaa kuin se mitä se matkii ! :)))
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Vladimir Pantelic's profile photoTyler Baker's profile photoMartin Creutziger's profile photoAndriy Tymchenko's profile photo
 
Riku, I was stuck in the Wikimedia stand during basically the whole FOSDEM. And I could even say properly Hi! when you came. Anyway, next time. I'm very happy to see that you keep working on the cutting edge.
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Protip; On Aarch64 system, If running 32-bit arm programs work as root, but crash with "killed" or "segmentation fault" when running them with non-root users, check value of /proc/sys/vm/mmap_min_addr  (should be 32768 or less it seems).

Kernel sets it to a sensible value by default, but userspace might override it in the name of security.
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awesome tip!
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Adrian M Negreanu's profile photoRiku Voipio's profile photoMaksim Lin's profile photoNanik T's profile photo
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+Adrian M Negreanu possible, I haven't really thought about it since I still need to explain things myself anyways :)
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from "Yay it booted":

<5>[    0.000000] Linux version 3.10.40-g65ce881 (voipio@aimless)(gcc version 4.9.1 20140505 (prerelease) (crosstool-NG linaro-1.13.
1-4.9-2014.05 - Linaro GCC 4.9-2014.05) ) #9 SMP PREEMPT Tue Nov 11 22:10:46 EET 2014
<6>[    0.000000] CPU: NVIDIA Denver 1.0 [4e0f0000] revision 0
... to ...
<3>[    0.704622] kvm [1]: HYP mode not available
... oh crap. 

Probably blame the trusted OS:

<6>[    0.479651] trusty trusty.4: trusty version: Build: 1518259, Built: 20:42:20 Oct 15 2014

Trusted computing doesn't trust me enough to give me EL2 - a bit like "People's democratic" in a country name means it's neither. 
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+Måns Rullgård​ Virtualization is last season. The hype is in containers now...
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Have him in circles
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