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by ejolson
Mon Sep 09, 2019 2:09 am
Forum: General discussion
Topic: Raspberry Pi 4 usb boot?
Replies: 303
Views: 49878

Re: Raspberry Pi 4 usb boot?

NOOBS doesn't use kexec. It uses a flag in the SoC (somewhere under /sys) that specifies which partition to use for the next boot, then performs a reboot. That is my understanding as well. Is there any documentation? What are the details? /sys/module/bcm270x/parameters/reboot_part is long gone and ...
by ejolson
Sun Sep 08, 2019 11:24 pm
Forum: Staffroom, classroom and projects
Topic: PiNet for Buster and the Pi 4B
Replies: 6
Views: 2061

Re: PiNet for Buster and the Pi 4B

So I have a Pi 4B in front of me and an Ubuntu 18.04.3 VM installing currently, as tonight I have been able to set aside some time, so perhaps it will get a little closer... Actual progress can be followed on this branch https://github.com/PiNet/PiNet/tree/buster-development It would appear that th...
by ejolson
Sun Sep 08, 2019 9:34 pm
Forum: Networking and servers
Topic: WireGuard on the Raspberry Pi
Replies: 11
Views: 526

Re: WireGuard on the Raspberry Pi

you don't need to download from source. latest version is on debian unstable and you can use apt pinning. just go to the wireguard website and they explain everything. you can also use angristan's script to configure everything automatically, although i did have to change one line in the script bec...
by ejolson
Sun Sep 08, 2019 9:13 pm
Forum: General discussion
Topic: Raspberry Pi 4 usb boot?
Replies: 303
Views: 49878

Re: Raspberry Pi 4 usb boot?

Then make a chainloader. USB boot is intentionally limited in scope to "find the first valid boot disk and boot from it". I'm trying to make a chain loader. It will be called slug. Do you have any idea how to make kexec work on the Raspberry Pi? How does NOOBS do it? NOOBS doesn't use kexec. It use...
by ejolson
Sun Sep 08, 2019 7:15 pm
Forum: General discussion
Topic: Raspberry Pi 4 usb boot?
Replies: 303
Views: 49878

Re: Raspberry Pi 4 usb boot?

jdb wrote:
Sun Sep 08, 2019 5:29 pm
Then make a chainloader. USB boot is intentionally limited in scope to "find the first valid boot disk and boot from it".
I'm trying to make a chain loader. It will be called slug.

Do you have any idea how to make kexec work on the Raspberry Pi?

How does NOOBS do it?
by ejolson
Sun Sep 08, 2019 6:27 pm
Forum: Networking and servers
Topic: WireGuard on the Raspberry Pi
Replies: 11
Views: 526

WireGuard on the Raspberry Pi

Recently a way to encrypt network connections called WireGuard was announced that operates like IPSec at the kernel level for efficiency; uses 4000 lines of code instead of 600,000 lines. Here is a summary of results for WireGuard using the Pi 4B and two Xeon E5-1650 servers. Direct WireGuard Relati...
by ejolson
Sun Sep 08, 2019 4:45 pm
Forum: General discussion
Topic: Wildhog alarm
Replies: 5
Views: 243

Re: Wildhog alarm

The function should work as this; Hog enter motion sensor area Motion sensor starts camera Motion sensor starts speaker Hopefully hog runs away Motion sensor stops speaker Motion sensor stops camera. What do you think guys? Perhaps instead of speaker some disco light might be lit or something. Migh...
by ejolson
Sun Sep 08, 2019 4:02 pm
Forum: General discussion
Topic: Raspberry Pi 4 usb boot?
Replies: 303
Views: 49878

Re: Raspberry Pi 4 usb boot?

I can't think of a plausible situation in which you would have connected 2 SSDs with Pi bootloaders on and need to switch between the two. It seems likely to me that even a single disk might have multiple Pi boot directories that one would like to choose from. After searching, a grand unified bootl...
by ejolson
Sun Sep 08, 2019 2:54 pm
Forum: General programming discussion
Topic: Liberation through Computer Literacy
Replies: 1125
Views: 49724

Re: Liberation through Computer Literacy

John_Spikowski wrote:
Sun Sep 08, 2019 11:18 am
What is the goal? Speed or reach?
The goal is liberation through computer literacy.

Have you compared the speed of Script Basic running in 64-bit mode to 32-bit mode? Does it run faster or slower under the 64-bit Gentoo image?
by ejolson
Sun Sep 08, 2019 5:27 am
Forum: Gentoo
Topic: Updated 64-bit Gentoo Image for RPi3 Released (now also for RPi3B+ and RPi4B)
Replies: 257
Views: 66298

Re: Updated 64-bit Gentoo Image for RPi3 Released (now also for RPi3B+ and RPi4B)

Maybe im going to go to libelec or somenthing like this, you know if libelec you can use chrome? to go to another websites outside kodi? or maybe inside kodi by addons? Pass, but if you post a short query in the General discussion forum here, I'm sure someone who does know about this stuff will be ...
by ejolson
Sun Sep 08, 2019 4:43 am
Forum: Off topic discussion
Topic: Raspberry Pi Zero W Revision
Replies: 7
Views: 647

Re: Raspberry Pi Zero W Revision

In case that there will be a new Raspberry Pi Zero W in development, I would like to see a USB 3.0 port as well as a dual core processor with a heat spreader and possible more RAM (as RAM prices are dropping slightly). Please do not post wish lists, it has all been asked before, it is insulting to ...
by ejolson
Sun Sep 08, 2019 4:29 am
Forum: General discussion
Topic: Why moving to 64bit?
Replies: 259
Views: 18070

Re: Why moving to 64bit?

Heater, your Rust tests were ARMv6 baselined and thus invalid. Please see my posts above and rerun your tests. How do you specify ARMv7 and with Cortex-A53 tuning using the Rust compiler? I have rerun and updated the Python3 timings for the anagram programs here . The loss in performance when movin...
by ejolson
Sun Sep 08, 2019 2:33 am
Forum: Advanced users
Topic: Industrial pi
Replies: 9
Views: 462

Re: Industrial pi

Hello everyone, I wanted to know if we can upgrade hardware of raspberry pi 4 and make it more suitable for industrial environment. Like real time clock and stable PWM in noisy environments etc. Are there any industry hardened pi already available? How can we make sure that the pi doesn't face data...
by ejolson
Sat Sep 07, 2019 11:56 pm
Forum: Networking and servers
Topic: Make RPi show in Network List in Windows 8 or 10
Replies: 9
Views: 453

Re: Make RPi show in Network List in Windows 8 or 10

Hopefully just something stupid I have done. I just want to see my RPi (3+B) in the list of computers when I look at the network display of devices in Windows 8 or 10. I can ping the RPi with the DHCP assigned IP(4) address. I can see the Shared Folder contents on the RPi using Samba. But I can not...
by ejolson
Sat Sep 07, 2019 6:44 am
Forum: General programming discussion
Topic: Liberation through Computer Literacy
Replies: 1125
Views: 49724

Re: Liberation through Computer Literacy

To set it as such, once you have the image running issue: demouser@pi64 ~ sudo eselect python set python3.7 I've downloaded the latest Gentoo 64-bit image and performed the eselect command to make the new Python interpreter active. After rerunning the insane Python anagram programs, the 64-bit perf...
by ejolson
Sat Sep 07, 2019 2:18 am
Forum: Networking and servers
Topic: Gigabit Switch for Pi 4
Replies: 14
Views: 951

Re: Gigabit Switch for Pi 4

Thanks for all the recommendations of gigabit switches that do work with the Raspberry Pi 4B--that will be useful to avoid any further problems! Woohoo! The TP-LINK TL-SG108 Unmanaged 10/100/1000Mbps 8-Port Gigabit Desktop Switch is now on order. If all goes well, I'll be back to my file-server exp...
by ejolson
Fri Sep 06, 2019 4:35 pm
Forum: General discussion
Topic: Raspberry Pi 4 Thread - general discussion
Replies: 861
Views: 88343

Re: Raspberry Pi 4 Thread - general discussion

SynGreis wrote:
Fri Sep 06, 2019 4:29 pm
My thoughts precisely.

Unfortunately i got this from Canakit and their number is just telling people to email them.

when i receive a response ill be sure to tie them into this forum.
My impression is that Canakit is a pretty reputable vendor. It will be interesting to see what happens.
by ejolson
Fri Sep 06, 2019 4:27 pm
Forum: General discussion
Topic: Raspberry Pi 4 Thread - general discussion
Replies: 861
Views: 88343

Re: Raspberry Pi 4 Thread - general discussion

thats a good question. but i did no modifications for clock and performance. it was overheating with stock image. I even slapped a fresh install just with buster lite(just terminal) and it was giving off those readings. Mine is the 2GB model. I wonder if the 4GB model runs noticably hotter. Given t...
by ejolson
Fri Sep 06, 2019 4:07 pm
Forum: General discussion
Topic: Raspberry Pi 4 Thread - general discussion
Replies: 861
Views: 88343

Re: Raspberry Pi 4 Thread - general discussion

And note that the Pi doesn't technically overheat. It throttles itself so it doesn't overheat, as do PC's and phones etc nowadays. According to I cannot put the case on because it overheats and shuts off while giving me the temperature warning. Before it shuts down i run the command vcgencmd measur...
by ejolson
Fri Sep 06, 2019 4:48 am
Forum: General discussion
Topic: Upgrade from pi 2B rev 1.1 to pi 4B(4GB)
Replies: 7
Views: 265

Re: Upgrade from pi 2B rev 1.1 to pi 4B(4GB)

Hi, I've just ordered a new pi 4B (4GB) to replace my existing pi 2B rev 1.1. Can I just take the SD card out and plug it straight into the new pi, or should I reinstall everything from scratch? Are there any hardware specific things in the install? I'm using OSMC and Kodi and using it as a TV/Movi...
by ejolson
Fri Sep 06, 2019 4:39 am
Forum: Advanced users
Topic: RPi 4b as desktop computer
Replies: 5
Views: 421

Re: RPi 4b as desktop computer

diogen151 wrote:
Thu Sep 05, 2019 6:43 pm
Yes, GNU Octave is slow and almost dysfunctional: file browser is unusable.
This is quite strange. I haven't tried Octave on a Pi recently, but will try it soon. I assume you have an HDMI monitor connected rather than logging in through RealVNC. Is that right?
by ejolson
Thu Sep 05, 2019 4:57 pm
Forum: Advanced users
Topic: RPi 4b as desktop computer
Replies: 5
Views: 421

Re: RPi 4b as desktop computer

diogen151 wrote:
Thu Sep 05, 2019 12:55 pm
-OCTAVE, strange behaviour in file-browser
Thanks for posting. By Octave do you mean

https://en.m.wikipedia.org/wiki/GNU_Octave

In what way doesn't it work?
by ejolson
Thu Sep 05, 2019 3:51 pm
Forum: General programming discussion
Topic: Sorting files by date & outputting to list
Replies: 6
Views: 489

Re: Sorting files by date & outputting to list

I'm fairly new to all things Raspberryey / Linuxey, but I'm moving some Windows scripts over to my new Raspbery Pi home server. This PowerShell code copies footage from my CCTV camera storage (stored in ~250MB chunks) and copies it to a single file using ffmpeg. The struggling to create a script to...
by ejolson
Thu Sep 05, 2019 2:44 pm
Forum: General discussion
Topic: Raspberry Pi computer looks down on Earth
Replies: 15
Views: 759

Re: Raspberry Pi computer looks down on Earth

I've got visions of a 1,000,000 cows in a big shed with a pipe coming off filling the rocket now :lol: Moo. While carbon neutral is nice, after the politics are finished, being nitrogen neutral may be more important. Moo. I've always been too overprotective of my Pi computers to let them go near ou...
by ejolson
Thu Sep 05, 2019 5:31 am
Forum: General discussion
Topic: Network Interfaces (worm-shaped appendix)
Replies: 18
Views: 230

Re: Network Interfaces

Is there a better way for applications to be notified of WiFi devices being plugged and unplugged, of access points becoming available and disappearing again, etc ? As is required for those little widgets in the corner of our screens that we use to connect to WiFi. Other than taking up space in the...

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