The Raspberry Pi Thread

[ZirconiumX]

Julien,

*Don't* do any compiling on the raspberry pi. It takes an hour just to compile Quake 3, and 42 minutes to compile completely the cutechess project.

So you'd better have plenty of time on your hands.

1) KP has never happened for me. I've used the Debian distro, Arch Linux, and now Raspbian. All quite stable, so long as you don't do e2fsck on it. (I truly am a stupid idiot)

Mac users don't need a virtualizer at all. Just use Terminal:

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$ df -h
<hard disk stuff>
$
<insert sd card reader with sd card in>
$ df -h
<hard disk stuff>
<new device, in my case disk1s1>
$ diskutil unmount <name of new device>
Device <name of new device> unmounted.
$ dd bs=1m if=path/to/image.img of=/dev/<raw disk name; remove the s1 bit and add r to the front; for me this is rdisk1>
<a long wait later>
<disk stuff>
$ diskutil eject <name of new device>
Disk <name of new device> ejected.
$
You can now use your sd card.

2) See above post.

Matthew:out

Thanks for the SD tips for Mac users, very usefull!

Compiling Pred on the RP was very easy: I just had to use my configs for OSX and 32 bits instead of 64, and it compiled. It went quite fast actually (a few seconds). But the FPC compiler is very fast and Pred is only 5000 lines long.

Well, it's quicker than GCC!

Now, about the performances... errr... how shall I put this? Snail Pred?
Despite I activated all the compiler's optimizations I get 380Kn in perft (12.8 seconds to run a perft 5! ), and about 30Kn in game...

I warned you...

Matthew:out

[JuLieN]

hmm... xboard doesn't want to run (unable to create font set), and gnuchess won't start either (malloc() cannot allocate memory)...

[ZirconiumX]

The xboard problem is a known problem. The best I can suggest is

apt-get remove xboard

apt-get update && apt-get dist-upgrade

apt-cache search xfonts-* | grep xfonts-* | apt-get install -

apt-get install xboard

The above may or may not work.

The second by closing every non essential program, and trying again.

If that doesn't work you may have to try more extreme measures.

Matthew:out

[JuLieN]

The xboard problem is a known problem. The best I can suggest is

apt-get remove xboard

apt-get update && apt-get dist-upgrade

apt-cache search xfonts-* | grep xfonts-* | apt-get install -

apt-get install xboard

The above may or may not work.

The second by closing every non essential program, and trying again.

If that doesn't work you may have to try more extreme measures.

Matthew:out

Thanks Matthew! Now XBoard is running!

But I can't get it to use Predateur as its engine. Each time I try to add it I get

Failed to start first chess program polyglot -noini -ec "Desktop/Predateur" -ed "Desktop" -uci NalimovCache=4 on localhost: polyglot: No such file or directory

I'm no Linux expert (that's an understatement...) but obviously it can't find polyglot. Did you get Xboard to load a UCI engine on the Raspburry Pi?

[geots]

It appears that the designated merchant of the Raspberry Pi for US residents is at http://www.newark.com/ and currently the board is out of stock. However, the site has a form where one can register their name and email address to be contacted at a later date.

One report states that the current estimated delivery date for new orders has now slipped to mid May.

My apologies if this post sounds like an advertisement; I'm only trying to get the information out so as to save others the time and effort of searching.

Yes, with all the threads you have posted about the thing it certainly sounds like you are getting part of the profits. But i'm ok with that too- it just won't be from me.


gts

[mephisto]

Julien
Have you got Arena to work?

[ZirconiumX]

Julien,

apt-get install polyglot

Problem solved.

Bryan,

Arena simply won't run. Linux on x86 is unstable, to say the least, so god forbid what might happen if you tried it on the RasPi.

Matthew:out

[JuLieN]

Julien
Have you got Arena to work?

Hmm, I don't think there is an Arena version for ARM Linux yet...

Julien,

apt-get install polyglot

Problem solved.

Bryan,

Arena simply won't run. Linux on x86 is unstable, to say the least, so god forbid what might happen if you tried it on the RasPi.

Matthew:out

Thanks Matthew, that (almost) did the trick!

Now, I have one problem remaining: the only way I found for not getting polyglot to protest because it couldn't find my engine if I had it in "hom" or on the "desktop" was to put it in usr/games (Yes, right with Fairymax and Fruit...), something I had to do as Root... Surely there's a simpler way to do this?

Whatever, Pred is working fine in Xboard... at 20-30 Kns... ^^

[ZirconiumX]

Surely you know how to make an ini file for Predateur!

If not:

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[PolyGlot]

EngineDir = ~/Desktop/
EngineCommand = ./Predateur

Book = true

Resign = true
ResignScore = 500

[Engine]

Hash = 16

Copy the above and paste it into a text file called predateur.ini in /usr/games (it's important). Put Predateur back on the Desktop and run:

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xboard -fd /usr/games -fcp "./polyglot predateur.ini"

As always, I cannot guarantee that this works.

Matthew:out

[ZirconiumX]

Julien,

As for the speed problem, try copying this and pasting it in /boot/config.txt

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arm_freq = 900
gpu_freq = 350
sdram_freq = 500

and reboot.

**IMPORTANT**

If the raspberry pi doesn't boot up with this, turn the Pi off, remove the SD card, plug it into your computer. You should find a file called config.txt (I wonder where that came from) open it with your favourite text editor and replace

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arm_freq = 900

with

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arm_freq = 850

Eject the sd card, plug it in, start the RasPi up. If it doesn't boot *then*, try

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arm_freq = 800
gpu_freq = 300
sdram_freq = 450

Rinse and repeat.

If it doesn't boot then, let me know.

Matthew:out[/code]