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by ejolson
Wed Jan 22, 2020 4:29 am
Forum: Off topic discussion
Topic: What was your first computer?
Replies: 484
Views: 184991

Re: What was your first computer?

And the other 5 similarly huge and complex boards that went with it! That's a fantastically sharp image. I can read the markings on almost all of the chips and recognize them. Here is what a GPU looks like today: https://images.tweaktown.com/news/6/0/60136_04_nvidia-titan-teardown-reveals-beautiful...
by ejolson
Tue Jan 21, 2020 5:27 pm
Forum: Troubleshooting
Topic: Dynamic "turbo" frequency not engaging
Replies: 2
Views: 113

Re: Dynamic "turbo" frequency not engaging

Just upgraded to the RPI4 from RPI3B (overclocked to 1450) to use as a desktop. It seemed to be going very slow (running raspbian) and I started troubleshooting. Made sure everything including BIOS was up to date. My CPU freq was holding at 600mhz under idle as expected but when I hit it with a sys...
by ejolson
Tue Jan 21, 2020 4:35 pm
Forum: General discussion
Topic: Future of raspberry pi - software related
Replies: 274
Views: 9373

Re: Future of raspberry pi - software related

This appears to be a commercial installation type of use case. No, it is not: In my case, I am retired and am working benevolently for an association promoting environmental measurement stations. The stations are deployed at homes of people, who are willing to provide a station on their own expense...
by ejolson
Tue Jan 21, 2020 4:15 pm
Forum: Staffroom, classroom and projects
Topic: Piserver shared folders
Replies: 1
Views: 67

Re: Piserver shared folders

Hoping for some fairly easy instrucstions here. I have Piserver setup and have been using it with success. However, I need to recreate a couple of shared folders. One folder for distributing project resources and ideally another folder for handing in completed work. The Piserver Tool makes it easy ...
by ejolson
Tue Jan 21, 2020 3:45 pm
Forum: General discussion
Topic: How to control one Pi from another over Ethernet?
Replies: 34
Views: 936

Re: How to control one Pi from another over Ethernet?

AFAIK, the disk-less NFS installation needs a ramdisk. The usual way of setting up a diskless computer using a Unix-like operating system is to mount the root filesystem read-write over NFS. The filesystem used to be organised in such a way that the part with which could be mounted read-only was cl...
by ejolson
Tue Jan 21, 2020 3:10 pm
Forum: Off topic discussion
Topic: What was your first computer?
Replies: 484
Views: 184991

Re: What was your first computer?

What I did not know until checking just now is that Jez San also helped Nintendo develop the Super FX Graphics Support Unit (GSU) for the Super Nintendo Entertainment System (SNES). Was that the first 3D GPU in the world? Maybe the first 3D GPUs were the Geometry Engines shipped in the Silicon Grap...
by ejolson
Mon Jan 20, 2020 11:47 pm
Forum: Off topic discussion
Topic: PCB Engineering - Legal side questions
Replies: 7
Views: 303

Re: PCB Engineering - Legal side questions

If the schematic or PCB design was published with the product, as they often were in the old days of radios, tvs, test gear and the like, then that is all subject to copyright law. The terms of which last forever, at least as far as anyone alive today is concerned. Forget about any "statute of limi...
by ejolson
Mon Jan 20, 2020 11:11 pm
Forum: Networking and servers
Topic: NFSv4 with user-level Kerberos
Replies: 1
Views: 109

Re: NFSv4 with user-level Kerberos

Has anyone here set up a Pi 4B as a NFSv4 file server using Kerberos for user level authentication? I'm about to embark upon such an adventure (maybe) and was wondering if anyone else has already documented what needs to be done and how or at least knows some reliable sources of information. I've m...
by ejolson
Mon Jan 20, 2020 5:05 pm
Forum: General discussion
Topic: Future of raspberry pi - software related
Replies: 274
Views: 9373

Re: Future of raspberry pi - software related

Wow, Enlightenment is still ongoing. And Rasterman is still working on it. Haven't seen any mention of Enlightenment anywhere for a decade and more. I gave Enlightenment a go back in 1998 when I was into endless building and rebuilding of Linux installations. I recall it worked very well and you co...
by ejolson
Mon Jan 20, 2020 4:28 pm
Forum: Off topic discussion
Topic: For mahjongg Moderator , On his remark on my post
Replies: 22
Views: 748

Re: For mahjongg Moderator , On his remark on my post

This post is to mahjongg " Moderator" concerning his remark to my Post on the print spacing. I thought you was a bit blunt , saying the post was Unreadable, yes I should have spaced it better I hope the post contents was not wrong or misleading, as this could give the impression to some reading the...
by ejolson
Mon Jan 20, 2020 3:08 am
Forum: General discussion
Topic: How to control one Pi from another over Ethernet?
Replies: 34
Views: 936

Re: How to control one Pi from another over Ethernet?

If displaying a pi from one command, was so easy, What prevents one from displaying all the pis in the world? There must be some sort of difficulty involved in the setup, or one could eg: be snooping off someone else's activity online! Privacy is one thing that needs to be carefully evaluated when ...
by ejolson
Sun Jan 19, 2020 11:10 pm
Forum: General discussion
Topic: what does "-bash: fg: no job control" on login mean?
Replies: 18
Views: 655

Re: what does "-bash: fg: no job control" on login mean?

Sticking set -x somewhere at the top of the usual login scripts -- .login, .bashrc, .bash_login etc. -- might be useful. I've seen it before and it was definitely because something was broken, but I can't remember what. Maybe something like the /tmp filesystem being full or the wrong permissions in...
by ejolson
Sun Jan 19, 2020 5:09 pm
Forum: Troubleshooting
Topic: [Pi4] file transfer problems from USB 3 HDD to USB 3 thumbdrive
Replies: 2
Views: 100

Re: [Pi4] file transfer problems from USB 3 HDD to USB 3 thumbdrive

Pi4 on raspbian Buster kernel 4.19 Trying to transfer files from an externally powered WD mybook to a thumbdrive. both plugged in the usb 3 ports. initially copies the files okay, but ssh & ftp connection crashes (hangs) after a while when transferring a large file (24GiB). I can reconnect via ssh,...
by ejolson
Sun Jan 19, 2020 4:23 pm
Forum: Troubleshooting
Topic: Pi 4 won't boot without HDMI plugged in
Replies: 13
Views: 2132

Re: Pi 4 won't boot without HDMI plugged in

For any Pi, using Raspbian and RealVNC, and that may be required to run headless (ie. without a display temporarily or "permanently") I strongly suggest that use is made of the RealVNC server's virtual mode. FWIW, I have posted several examples here: https://www.cpmspectrepi.uk/raspberry_pi/MoinMoi...
by ejolson
Sun Jan 19, 2020 4:16 pm
Forum: Raspberry Pi Desktop for PC and Mac
Topic: VNC for Raspberry Pi Desktop (PC and Mac)
Replies: 4
Views: 172

Re: VNC for Raspberry Pi Desktop (PC and Mac)

@ejolson he has a newer laptop with Intel integrated graphics. He could play Minecraft just fine for example, but not Destiny 2. Also the vm audio was fine on my desktop, but when I connected to it with my laptop over the network I got the bad audio. The visual experience was fine (not great). Are ...
by ejolson
Sun Jan 19, 2020 4:00 pm
Forum: General discussion
Topic: Future of raspberry pi - software related
Replies: 274
Views: 9373

Re: Future of raspberry pi - software related

I know the ability to enter a WPA-supplicant file in Boot, but that must be teached first. It is not intuitive at all (and mostly not even known) for newcomers. That should also be the fallback behaviour whenever a headless system cannot connect for a given time, enabling you to reconfigure the con...
by ejolson
Sun Jan 19, 2020 5:13 am
Forum: Off topic discussion
Topic: algorithms and ethics at the Barbershop
Replies: 37
Views: 1225

Re: algorithms and ethics at the Barbershop

'Algorithm' is simply a modern term. They have been employed for thousands of years. They have become faster and more complex with the aid of computers. 'AI' is just a bastardization of 'pattern recognition'. Non-human intelligence is not even on the horizon. Wake me when a computer can tell me wha...
by ejolson
Sun Jan 19, 2020 4:42 am
Forum: Beginners
Topic: Static IP address
Replies: 12
Views: 359

Re: Static IP address

I guess in this case I assumed (not necessarily correctly) that since OP was accessing the Pi from outside the LAN, via port forwarding, they had access to the router configuration. They want a consistent IP on the Pi so that port is forwarded to the correct device on the LAN. The reason that doing...
by ejolson
Sun Jan 19, 2020 4:22 am
Forum: Troubleshooting
Topic: Scrolling causes Terminal app to crash...
Replies: 1
Views: 74

Re: Scrolling causes Terminal app to crash...

I have noticed that if the Terminal app has a bunch of lines in its buffer and that grabbing the scroll button and moving it up and down fairly quickly will cause the Terminal app to crash. If I VNC into my rpi this does not happen. Am I the only one with this problem? I have an rpi 4b 4GB of memor...
by ejolson
Sun Jan 19, 2020 3:59 am
Forum: Raspberry Pi Desktop for PC and Mac
Topic: VNC for Raspberry Pi Desktop (PC and Mac)
Replies: 4
Views: 172

Re: VNC for Raspberry Pi Desktop (PC and Mac)

I am running the Raspberry Pi Desktop in VirtualBox and I cannot install VNC server. I tried sudo apt install realvnc-vnc-server realvnc-vnc-viewer from here: https://www.raspberrypi.org/documentation/remote-access/vnc/README.md as well as the download available here: https://www.realvnc.com/en/con...
by ejolson
Sun Jan 19, 2020 3:47 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Serial on RPi B works; won't work on RPi Zero W
Replies: 4
Views: 184

Re: Serial on RPi B works; won't work on RPi Zero W

I have an old RPi B (yes, the 2012 board) that I used to prototype a serial device. I went to move everything to a RPi Zero W so it would fit in a smaller project case, but I couldn't get the serial connection to work. Things I tried: Yes, I have disabled the terminal on the serial port, edited /bo...
by ejolson
Sat Jan 18, 2020 4:51 pm
Forum: General discussion
Topic: How to control one Pi from another over Ethernet?
Replies: 34
Views: 936

Re: How to control one Pi from another over Ethernet?

NFS will eat quite a lot of their limited RAM memory. Are you sure? I haven't measured the difference, but thought it would be less than 1MB. I find with GB networking that things run pretty quickly. Anyway, either an SD card or network boot can then be used with RealVNC, which seems to be the remo...
by ejolson
Sat Jan 18, 2020 4:35 pm
Forum: General discussion
Topic: New Pi 4B v1.2?
Replies: 209
Views: 21631

Re: New Pi 4B v1.2?

I would like to add myself to the list of people that travel with a pi. Presently it is a pi zero w that I access as an OTG device. In the future when I update to a newer laptop with USB-C, I'll take along a 4 instead. It would be nice if they are compatible with the same cables as the laptop, so a...
by ejolson
Sat Jan 18, 2020 6:05 am
Forum: General discussion
Topic: How to control one Pi from another over Ethernet?
Replies: 34
Views: 936

Re: How to control one Pi from another over Ethernet?

...Since wired networking is good for clustered arrangements (even if upstream is through WiFi), then the present use case involving BOINC suggests booting over the network and subsequently mounting the root filesystem using NFS from a convenient server... ...suggests booting over the network? Cons...
by ejolson
Fri Jan 17, 2020 10:25 pm
Forum: General discussion
Topic: How to control one Pi from another over Ethernet?
Replies: 34
Views: 936

Re: How to control one Pi from another over Ethernet?

Absolutely not! I just clone my master and change the hostname. That's it!... Ok, your method includes building a new SD card image for every machine which is totally unnecessary. PeterO "Which is totally unnecessary"??? How will you else build up your SD card? Piclone is the easiest method to get ...

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