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by rpdom
Wed Jul 10, 2019 11:16 am
Forum: Troubleshooting
Topic: Pi 4 with Buster - No hardware acceleration for Video/WebGL in Chromium?
Replies: 44
Views: 3080

Re: Pi 4 with Buster - No hardware acceleration for Video/WebGL in Chromium?

Interesting. My old laptop (about 4 years old) gets 11-12fps with 500 fish at that resolution, so the Pi 4B is a lot better.

My current laptop gets 60fps with 1000 fish, but it cost slightly more than a Pi 4B 4GB ;-)
by rpdom
Wed Jul 10, 2019 10:54 am
Forum: Troubleshooting
Topic: Swapping the SD card between a Raspi 3a+ and a Zero
Replies: 6
Views: 170

Re: Swapping the SD card between a Raspi 3a+ and a 3Zero

Ah, ok. I haven't had any problems with my Zeroes, apart from the first one which died I assume because I somehow short circuited it. Here's one example of one of mine pi@raspi9:~ $ uptime 11:50:47 up 370 days, 5:47, 1 user, load average: 0.32, 0.34, 0.30 pi@raspi9:~ $ cat /sys/firmware/devicetree/b...
by rpdom
Wed Jul 10, 2019 10:44 am
Forum: General discussion
Topic: forgot the password.
Replies: 11
Views: 367

Re: forgot the password.

epoch1970 wrote:
Wed Jul 10, 2019 10:32 am
Does "mount -o remount,rw /dev/mmcblk0p2 /" work better?

This assumes you're using Raspbian where the root filesystem is in the second partition "p2", the boot FAT partition being "p1"
FTFY
by rpdom
Wed Jul 10, 2019 9:51 am
Forum: Troubleshooting
Topic: Swapping the SD card between a Raspi 3a+ and a Zero
Replies: 6
Views: 170

Re: Swapping the SD card between a Raspi 3a+ and a 3Zero

Perhaps you can clarify what the actual issue was?

By saying it was "suboptimal" you appeared to be saying that the Zeroes ran slower - which they do.
by rpdom
Wed Jul 10, 2019 9:46 am
Forum: General discussion
Topic: Create new Image SD Card - Pi 4
Replies: 4
Views: 218

Re: Create new Image SD Card - Pi 4

once completed shutdown the pi swap your existing SD card in the pi for the new one and it should just boot as before , you will need to run sudo raspi-config and use that to expand the OS to use all of your new SD card . You don't need to do that. The SD Card Copier automatically resizes the data ...
by rpdom
Wed Jul 10, 2019 9:43 am
Forum: Troubleshooting
Topic: Raspberry Pi 4 temperature
Replies: 286
Views: 54741

Re: Raspberry Pi 4 temperature

I think a solution for keeping the CPU cold, while having a HAT attached, is to design a "cooling HAT" between the Pi and the "useful" HAT stacked on to ! A thin blowing fan (like on laptop ones) on the "cooling HAT" could extract the hot air above the CPU and send it to one side, allowing a lower ...
by rpdom
Wed Jul 10, 2019 7:04 am
Forum: General discussion
Topic: Raspberry Pi 4 B won't boot from SD card
Replies: 3
Views: 284

Re: Raspberry Pi 4 B won't boot from SD card

Same problem here, buy I'm quite sure my issue was self inflicted, as I believe I shorted 5.0 VDC Power with 3.3 VDC power. :x This is not the same problem as you said you are using a Pi 3B+, while this thread is about the 4B. Yes, shorting the power pins will kill your 3B+. The SD card is probably...
by rpdom
Wed Jul 10, 2019 6:34 am
Forum: General discussion
Topic: RPi Cluster Web Server
Replies: 4
Views: 195

Re: RPi Cluster Web Server

Don't know about a cluster, but I have recently worked on a distributed system with web servers, database servers and application servers in multiple locations globally. The servers were all Linux and all the software is available for the Pi. One database server at each location using MariaDB with m...
by rpdom
Wed Jul 10, 2019 6:25 am
Forum: For sale
Topic: Raspberry Pi 4B in USA
Replies: 28
Views: 1546

Re: Raspberry Pi 4B in USA

the us power supply is the hotter item to get , with out it your new pi4 will not work properly as it has a usb-c special circuit. Huh? I'm using the old 2.5amp Pi PS. Not really enough for USB hard drive so those will get external power. 4B4 is scarce downunder too, but my 4B1 is pretty good for s...
by rpdom
Wed Jul 10, 2019 4:42 am
Forum: General discussion
Topic: When are people in the U.S. getting their Pi 4s?
Replies: 113
Views: 4387

Re: When are people in the U.S. getting their Pi 4s?

jamesh wrote:
Tue Jul 09, 2019 9:24 pm
alphanumeric wrote:
Tue Jul 09, 2019 9:15 pm
I would have said inexpensive instead of cheap ;) . I bought what I know works and was tested to work on a Pi 4, like the official one was. Not all that hard to do.
Inexpensive is a much better word!
I like Affordable, or even Reasonably Priced (which is what the "rp" in "rpdom" stands for).
by rpdom
Wed Jul 10, 2019 4:19 am
Forum: General discussion
Topic: program that counts gpio pin pulses
Replies: 6
Views: 258

Re: program that counts gpio pin pulses

Are you thinking of piscope?
by rpdom
Tue Jul 09, 2019 8:57 pm
Forum: Troubleshooting
Topic: Swapping the SD card between a Raspi 3a+ and a Zero
Replies: 6
Views: 170

Re: Swapping the SD card between a Raspi 3a+ and a 3Zero

The Zero range is much slower than the Pi 3 range and only has a single CPU core instead of four.
by rpdom
Tue Jul 09, 2019 6:54 pm
Forum: Compute Module
Topic: LAN9514
Replies: 28
Views: 4641

Re: LAN9514

dp11 wrote:
Tue Jul 09, 2019 4:23 pm
Do you need Gigabit ethernet? if not can you use the lan9512?
That won't be much different from the 9514. Both have 100Mb ethernet. The 9512 has two USB ports and the 9514 has four.
by rpdom
Tue Jul 09, 2019 10:41 am
Forum: General discussion
Topic: Pi4 kit, where to buy in London?
Replies: 6
Views: 338

Re: Pi4 kit, where to buy in London?

I would say send me money and I'll order a kit for you and bring it to London. But even though I'm about 30 minutes away by train, the train ticket would cost me half as much as the Pi itself :(
by rpdom
Tue Jul 09, 2019 10:26 am
Forum: Off topic discussion
Topic: Got too many raspberries?
Replies: 25
Views: 1346

Re: Got too many raspberries?

These are my Pi that are currently in use: Raspberry Pi Model A Rev 2 Raspberry Pi Model B Rev 1 Raspberry Pi Model B Plus Rev 1.2 Raspberry Pi Zero Rev 1.3 Raspberry Pi Zero Rev 1.3 Raspberry Pi 2 Model B Rev 1.1 Raspberry Pi 2 Model B Rev 1.1 Raspberry Pi 3 Model B Rev 1.2 Raspberry Pi 3 Model B R...
by rpdom
Tue Jul 09, 2019 10:09 am
Forum: Off topic discussion
Topic: RIP 32 BIT
Replies: 223
Views: 7766

Re: RIP 32 BIT

I stuck with Windows through to 98SE and NT4.0 at home, 2000 at work. Then I switched entirely to Linux as I found Windows far too restrictive for my development needs. I had been using various Unix systems at work for a few years and took one of them home (It took a few trips as it was too heavy fo...
by rpdom
Tue Jul 09, 2019 6:47 am
Forum: HATs and other add-ons
Topic: PoE hat, Raspberry Pi 4, not able to power off
Replies: 39
Views: 1999

Re: PoE hat, Raspberry Pi 4, not able to power off

What does sudo poweroff do?
by rpdom
Tue Jul 09, 2019 6:32 am
Forum: Off topic discussion
Topic: OMG - I can't believe I did this
Replies: 11
Views: 714

Re: OMG - I can't believe I did this

I backup my systems weekly every Sunday morning. On the first Sunday of each month I take a full backup of each system to a server with sufficient disk space. On the remaining Sundays I use an incremental backup to only store the files that have changed since the previous backup. I also make additio...
by rpdom
Tue Jul 09, 2019 4:59 am
Forum: Automation, sensing and robotics
Topic: Adafruit Perma Proto Bonnet Mini confusion
Replies: 10
Views: 295

Re: Adafruit Perma Proto Bonnet Mini confusion

Having holes connecting to nothing is not only silly, but pointless. I disagree. There are many generic "proto" boards on the market that just consist of a matrix of through plated holes that aren't connected to anything. Components can be soldered to these boards and connections made between them ...
by rpdom
Mon Jul 08, 2019 6:10 pm
Forum: Off topic discussion
Topic: The Great Raspberry Pi Computers.
Replies: 105
Views: 4189

Re: The Great Raspberry Pi Computers.

Hmm, one of my first big projects was a two valve (tube) oscilloscope that didn't have a PCB, just tags to solder the components to. I should check if it still works. Since then I have used various types of strip board and home made PCBs. I looked at SMD and gave it a go. It even works on stripboard...
by rpdom
Mon Jul 08, 2019 1:11 pm
Forum: General discussion
Topic: Recommended Software error
Replies: 3
Views: 782

Re: Recommended Software error

Or do

Code: Select all

apt-get update --allow-releaseinfo-change
which will clear the warning and allow the update to continue.
by rpdom
Mon Jul 08, 2019 9:32 am
Forum: Beginners
Topic: "apt-get update testing to stable" [FIXED]
Replies: 19
Views: 8908

Re: "apt-get update testing to stable" [FIXED]

I guess this is because Debian Buster was released today. Is it worth waiting until this is fixed, I fear using: apt-get update --allow-releaseinfo-change Will do something irreversible or mess it up at a later date. Thanks There is no issue here. Debian/Raspbian Stretch used to be the "stable" rel...
by rpdom
Mon Jul 08, 2019 9:25 am
Forum: Troubleshooting
Topic: I can´t boot from usb in pi 4
Replies: 74
Views: 3899

Re: I can´t boot from usb in pi 4

Please be patient. An announcement will be made in the official Blog when it is ready.
by rpdom
Mon Jul 08, 2019 9:24 am
Forum: Off topic discussion
Topic: The Great Raspberry Pi Computers.
Replies: 105
Views: 4189

Re: The Great Raspberry Pi Computers.

Is it done by robots yet? Most of the board assembly work is done by robots. The components are too small to be done by hand in any sort of quantity, but other parts are handled by actual humans which is great. IIRC the Sony factory in Wales used to make old CRT televisions and was close to being s...
by rpdom
Mon Jul 08, 2019 9:20 am
Forum: General discussion
Topic: Update Error
Replies: 7
Views: 407

Re: Update Error

DougieLawson wrote:
Mon Jul 08, 2019 9:18 am
The pragmatic answer is upgrade to Buster on a new SDCard then move your programs & data over from the retired & unsupportable OS.
Dougie. Please read the posts. This is happening if you already have Buster.

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