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by fanoush
Fri Feb 28, 2020 6:31 am
Forum: Networking and servers
Topic: Problems adding a USB 3.0 SSD to PI4
Replies: 19
Views: 412

Re: Problems adding a USB 3.0 SSD to PI4

ejolson wrote:
Fri Feb 28, 2020 5:35 am
I wonder if shielded USB cables would help. Are you sure the noise isn't coming from your power supply instead?
Interesting paper about this usb 3.0 interference issue
https://www.intel.com/content/www/us/en ... paper.html
by fanoush
Fri Feb 21, 2020 1:10 pm
Forum: Advanced users
Topic: Pi4 64-bit raspbian kernel for testing - Focus on Pi4
Replies: 299
Views: 84332

Re: Pi4 64-bit raspbian kernel for testing - Focus on Pi4

I don't get it. Why you cannot confirm it yourself by commenting out the 'arm_64bit=1' in config.txt, rebooting, testing if the issue is gone and reenabling that line again? Takes like 1 minute?
by fanoush
Fri Feb 21, 2020 8:39 am
Forum: Advanced users
Topic: Pi4 64-bit raspbian kernel for testing - Focus on Pi4
Replies: 299
Views: 84332

Re: Pi4 64-bit raspbian kernel for testing - Focus on Pi4

After upgrading I noticed that vscode server, used for remote development using vs-code, doesn't seem to work any more on the pi. Well, anything that tries to determine architecture of the system now gets 'aarch64' from the 64bit kernel so that may break it. You can confirm this is the case by swit...
by fanoush
Tue Feb 11, 2020 11:43 am
Forum: Bare metal, Assembly language
Topic: Pi Zero W - Alternative boot options
Replies: 11
Views: 425

Re: Pi Zero W - Alternative boot options

I was wondering if No-one has done it because it isn't worth the effort for what you get. is true? I saw that christinaa's work was not finished but at least somewhat working. Or do you mean that no one has made a Pi successfully and completely boot with a custom bootloader? There is also fork that...
by fanoush
Mon Feb 10, 2020 3:41 pm
Forum: Bare metal, Assembly language
Topic: Pi Zero W - Alternative boot options
Replies: 11
Views: 425

Re: Pi Zero W - Alternative boot options

It can boot over USB, so if your chip can do USB host it is possible. Also there is possibly SPI boot mode but I didn't find working example. But as the boot ROM can be read and disassembled it is possible to figure it out I guess.

BTW why not to use Circle or Ultibo?
by fanoush
Wed Feb 05, 2020 6:26 pm
Forum: General discussion
Topic: Raspberry Pi Zero - Version 2?
Replies: 63
Views: 2177

Re: Raspberry Pi Zero - Version 2?

jdb wrote:
Wed Feb 05, 2020 5:52 pm
Because you would get a model that had neither Ethernet nor USB. Well, no USB host ports - but a single OTG port.
Which is just like A+ or 3A+?
And maybe on 4A+ you could put M.2 or mini pci-e slot on the bottom side?
by fanoush
Sat Feb 01, 2020 6:44 pm
Forum: General discussion
Topic: New Pi 4B v1.2?
Replies: 331
Views: 45849

Re: New Pi 4B v1.2?

W. H. Heydt wrote:
Sat Feb 01, 2020 6:18 pm
This is a minor error. Unless one is going to particularly expensive power cables or supplies, one would never notice the "problem".
There is also the reboot issue with hat attached https://github.com/raspberrypi/linux/issues/3065
by fanoush
Fri Jan 31, 2020 1:31 pm
Forum: Beginners
Topic: ARM Frequency
Replies: 16
Views: 931

Re: ARM Frequency

Botspot wrote:
Wed Jan 29, 2020 12:38 am
Please ignore Gavinmc42 , they misunderstood the question being asked.
Oh, I always thought there must be far more people behind Gavinmc42 than just one ;-)
However in this case I think at least one of them did understood the question and answered quite sensibly :-)
by fanoush
Fri Jan 31, 2020 12:57 pm
Forum: Troubleshooting
Topic: Swap file full with real RAM at 5% ??? Memory doubts
Replies: 9
Views: 548

Re: Swap file full with real RAM at 5% ??? Memory doubts

BTW what is the purpose of a 100MB swap file To kill your SD card with swap-hell when you go slightly over physical memory limits ;-) It was important to make is too small or otherwise you would notice and could prevent it when you notice the slowdown. With 100MB it is from full speed into swap hel...
by fanoush
Fri Jan 24, 2020 4:11 pm
Forum: Beginners
Topic: Is this possible to do with RaspberryPi - serial control of TV
Replies: 8
Views: 324

Re: Is this possible to do with RaspberryPi - serial control of TV

If you go this route, it is ESSENTIAL to use an adapter based on MAX3232, or equivalent with 3V3 connection to the Pi. Good point about 5V vs 3.3V. The adapter looks like it has only 4 pins - GND,VCC,RX,TX so hopefully you can put 3.3V from Pi to VCC and TX/RX levels will then match. Here is anothe...
by fanoush
Fri Jan 24, 2020 12:21 pm
Forum: Beginners
Topic: Is this possible to do with RaspberryPi - serial control of TV
Replies: 8
Views: 324

Re: Is this possible to do with RaspberryPi - serial control of TV

Looks like it can be done in two different ways , with multiple HDMI ports and a serial port. I also have the documentation for this serial port which shows that via serial commands it should be possible to change standby to on and off, and change input from HDMI1 to HDMI2. If the serial port on TV ...
by fanoush
Wed Jan 22, 2020 11:15 pm
Forum: Advanced users
Topic: Pi4 64-bit raspbian kernel for testing - Focus on Pi4
Replies: 299
Views: 84332

Re: Pi4 64-bit raspbian kernel for testing - Focus on Pi4

In that GitHub issue: https://github.com/docker/distribution/issues/3008 they've posted some workarounds. You can add either --privileged or --security-opt seccomp:unconfined . Wow that's great, it works! And there is also third solution mentioned which hopefully keeps security restrictions enabled...
by fanoush
Tue Dec 31, 2019 10:31 pm
Forum: Beginners
Topic: Pi Zero W - mini hdmi to VGA
Replies: 11
Views: 391

Re: Pi Zero W - mini hdmi to VGA

W. H. Heydt wrote:
Tue Dec 31, 2019 3:17 am
it is unlikely that you'll find a mini-HDMI to VGA converter.
I have one from ebay, was for same price like the full hdmi to vga (~5USD?). see photo here https://ibb.co/KD4TBkj
by fanoush
Mon Dec 23, 2019 8:31 am
Forum: General discussion
Topic: Pi Zero W multi purchases
Replies: 64
Views: 4100

Re: Pi Zero W multi purchases

X-Gen wrote:
Mon Dec 23, 2019 7:00 am
The wifi on the Zeros can easily be switched to a different channel.
In USA there are about 11 channels (I believe 13 for UK) to set each device to.
This prevents cross talk, network collisions etc...
In fact those channels overlap a lot. What you said it true only when using channels 1,6 and 11.
by fanoush
Tue Dec 10, 2019 1:53 pm
Forum: General discussion
Topic: Pi Zero W multi purchases
Replies: 64
Views: 4100

Re: Pi Zero W multi purchases

The $5 Pi Zero price, and the $10 Pi Zero W price are a One-Per-Customer introductory price (so everyone can get at least one cheap computer). This is what we were told years ago by representatives of RPF, and nothing has changed (and is not likely to change, ever). When mentioning this it would be...
by fanoush
Thu Dec 05, 2019 3:00 pm
Forum: Off topic discussion
Topic: Does this forum have a 'dark' mode ?
Replies: 27
Views: 3402

Re: Does this forum have a 'dark' mode ?

I think OP asked for visual dark mode of this forum ;-)
Sometimes it is quite dark even with shiny colours.
by fanoush
Sat Nov 30, 2019 12:53 pm
Forum: General discussion
Topic: Why isn't deb.debian.org not a default repo?
Replies: 13
Views: 823

Re: Why isn't deb.debian.org not a default repo?

Spot-on prediction! I decided to revert back to Raspbian's chromium-browser so I purged everything chromium-related, disabled the deb.debian.org repository, then installed chromium-browser and rpi-chromium-mods. But now when I run chromium-browser, I get a segmentation sault. [email protected]:~ $ chr...
by fanoush
Thu Nov 28, 2019 7:02 am
Forum: General discussion
Topic: New Raspian Buster with 64 Bit...(arm64v8)
Replies: 70
Views: 5091

Re: New Raspian Buster with 64 Bit...(arm64v8)

Its a prime number benchmark heavily dependent on 64-bit division. Of course in 64-bit mode that division is one instruction and very fast, but in 32-bit mode it is a library call and obviously very slow. Hence the large performance gain for 64-bit. That's the trouble with simplistic benchmarks. Wa...
by fanoush
Wed Nov 27, 2019 2:46 pm
Forum: General discussion
Topic: New Raspian Buster with 64 Bit...(arm64v8)
Replies: 70
Views: 5091

Re: New Raspian Buster with 64 Bit...(arm64v8)

Did I mention the codes I'm testing are 30% to 40% faster running as 64 bit. Despite the fact they only do 32 bit integer maths. Try to compile sysbench from source (e.g. the 0.4 version https://github.com/akopytov/sysbench/tree/0.4 ) under both and run its standard cpu benchmark computing primes '...
by fanoush
Sun Nov 24, 2019 4:49 pm
Forum: Troubleshooting
Topic: QEMU emulating i386 machine in RPi
Replies: 9
Views: 334

Re: QEMU emulating i386 machine in RPi

you don't need qemu-system to run x86 linux kernel, for your case qemu userspace emulation should be good enough and probably much easier and faster see https://wiki.debian.org/QemuUserEmulation This will keep your arm kernel and translate just the code in x86 binaries
by fanoush
Fri Nov 15, 2019 7:26 pm
Forum: General discussion
Topic: Pi4 as Desktop computer
Replies: 270
Views: 31312

Re: Pi4 as Desktop computer

For windows 10 check Winaero Tweaker, it can disable or tune many annoying features. Each tweak is also documented what it does to registry so you can do it by hand if you wish. This is first thing I install in each new win10 vm to keep some sanity.
by fanoush
Mon Nov 11, 2019 9:29 pm
Forum: Off topic discussion
Topic: Espruino on $9.99 fitness tracker
Replies: 9
Views: 6453

Re: Espruino on $9.99 fitness tracker

Just a heads up. If you are interested in this concept of running javascript on your watch, things got more professional now. There is kickstarter done by Espruino author which started today and is already funded after few hours. https://www.kickstarter.com/projects/gfw/banglejs-the-hackable-smart-w...
by fanoush
Wed Oct 30, 2019 7:29 pm
Forum: Beginners
Topic: Is the current Pi 4 useable as 64bit?
Replies: 21
Views: 2471

Re: Is the current Pi 4 useable as 64bit?

You don't need that experimental kernel, there will be one preinstalled for you, but you need to enable it yourself in config.txt
Then after booting (still 32bit) raspbian with 64bit kernel you can run other distributions inside raspbian via chroot or schroot or systemd-nspawn or any other way.
by fanoush
Wed Oct 30, 2019 7:00 pm
Forum: Networking and servers
Topic: communication between Raspis over 60GHz band
Replies: 9
Views: 853

Re: communication between Raspis over 60GHz band

So maybe that documentation can be changed to prevent confusion and either remove those two places mentioning 60GHz mode The possible values for hw_mode are: a = IEEE 802.11a (5 GHz) b = IEEE 802.11b (2.4 GHz) g = IEEE 802.11g (2.4 GHz) ad = IEEE 802.11ad (60 GHz) or clearly say that this mode is no...
by fanoush
Sat Oct 26, 2019 4:28 pm
Forum: Bare metal, Assembly language
Topic: RTOS on GPU ?
Replies: 33
Views: 2889

Re: RTOS on GPU ?

Check https://github.com/christinaa/rpi-open-firmware There is also gcc port so with enough motivation porting some RTOS is possible.

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