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by Mark_F
Sat Oct 24, 2020 2:02 am
Forum: General discussion
Topic: Clock speed changes after kernel upgrade
Replies: 6
Views: 386

Re: Clock speed changes after kernel upgrade

A Pi4 1GB with USB bot and the beta 64bit OS which vcgencmd measure_clock arm reports 700207040. My 4GB Pi4 with 64 bit kernel and 32 bit userland reports 1500398464 Your Pi 4 1GB is idle so is running at a lower clockspeed. Hmmm. Yes. Good point... :) And of course my 4GB Pi4 is far from idle... :)
by Mark_F
Sat Oct 24, 2020 1:25 am
Forum: General discussion
Topic: Clock speed changes after kernel upgrade
Replies: 6
Views: 386

Re: Clock speed changes after kernel upgrade

My Rpi 1B+ was using the overclock pre-set of 950MHz, but after installing the latest kernel (5.4.72+ #1356), the clock speed is now 1000MHz. Is this a bug? Is it a bug ? Probably not but there does appear to be a bit of strangeness happening. Maybe it has something to do with the latest updates. D...
by Mark_F
Wed Oct 07, 2020 3:02 am
Forum: Networking and servers
Topic: Problems with Apache2
Replies: 8
Views: 575

Re: Problems with Apache2

Well I thought it was fixed but, of course, it wasn't. I have however, after considerable research and log reading, identified the cause and the circumstances whereby it happens. Here goes an explanation.... This only happens with the Apple Safari browser using Apple WebKit. It happens with no other...
by Mark_F
Thu Sep 17, 2020 12:56 am
Forum: Raspberry Pi OS
Topic: How to get CPU load as a single value?
Replies: 6
Views: 333

Re: How to get CPU load as a single value?

Is there a way to get the CPU load as in the %CPU column from the top command as a single value? I'd like to put that on a 16x2 LCD next to the temperature from vcgencmd measure_temp, which I have got displaying. It would be nice to also see the CPU load but obviously the output from top is too com...
by Mark_F
Thu Aug 27, 2020 3:05 am
Forum: Advanced users
Topic: [Help]Need Config.txt raspbian (64 bit)
Replies: 2
Views: 276

Re: [Help]Need Config.txt raspbian (64 bit)

Here's mine.... It's totally unmolested from new... :D pi@raspberrypi:~ $ cat /boot/config.txt # For more options and information see # http://rpf.io/configtxt # Some settings may impact device functionality. See link above for details # uncomment if you get no picture on HDMI for a default "safe" m...
by Mark_F
Wed Aug 26, 2020 2:46 am
Forum: Networking and servers
Topic: Problems with Apache2
Replies: 8
Views: 575

[solved] Re: Problems with Apache2

No problem! Hope it's already fixed :D Well I reckon that it's fixed. Over the last few days I've put everything back to what it was when I had the problem. I did it bit by bit with no problems until I reinstalled php-fpm whereon the problem restarted. I removed it and the problem went away again a...
by Mark_F
Fri Aug 21, 2020 3:06 am
Forum: Networking and servers
Topic: Problems with Apache2
Replies: 8
Views: 575

Re: Problems with Apache2

Thanks again, I've done few things which means that I won't know which one fixed the problem if indeed it is fixed. 1. "arm_64bit=1" is left in /boot/config.txt 2. The Wordfence plugin for WordPress has been removed after reading reports of it causing segfaults. 3. php-fpm has been removed - I hardl...
by Mark_F
Thu Aug 20, 2020 3:48 am
Forum: Networking and servers
Topic: Problems with Apache2
Replies: 8
Views: 575

Re: Problems with Apache2

Thanks HEAPS for getting back. My betting is also tending to sway towards errant behaviour rom a WordPress plugin too. The problem is I can't pin this behaviour down to a time, apart from "it started probably a couple of months ago". That's about as useful as a chocolate tea pot though. I'm using an...
by Mark_F
Wed Aug 19, 2020 1:21 am
Forum: Networking and servers
Topic: Problems with Apache2
Replies: 8
Views: 575

Problems with Apache2

Hi all, I hope that this is the right place for this. maybe an Apache forum would be a better place but I thought I'd try here first as the level of knowledge on these forums is pretty damn good. For the last few months I've been having problems with Apache2. It manifests as not being able to connec...
by Mark_F
Sat Aug 15, 2020 4:39 am
Forum: General discussion
Topic: 150 meter Wifi connection to Pi
Replies: 20
Views: 969

Re: 150 meter Wifi connection to Pi

You could put a 50 ohm resistor across one of the antenna ports which would effectively reduce the chance of reception on that port to near zero. If that works then the now spare yagi could go to the dongle and replace the whip antenna. From what I've read here about your setup you won't be transmit...
by Mark_F
Fri Aug 07, 2020 2:29 am
Forum: General discussion
Topic: How do I get roblox on Raspberry PI 4 - OS: Raspbian. (NOOBS)
Replies: 11
Views: 3716

Re: How do I get roblox on Raspberry PI 4 - OS: Raspbian. (NOOBS)

fruitoftheloom wrote:
Fri May 01, 2020 4:43 pm
SinglePringle wrote:
Fri May 01, 2020 3:37 pm
Oh okay!

https://en.help.roblox.com/hc/en-us/art ... quirements
Much to the horror of my 5 yo grandson.
by Mark_F
Mon Jul 27, 2020 1:55 pm
Forum: Python
Topic: Python Adafruit Oled screen gives errors
Replies: 5
Views: 257

Re: Python Adafruit Oled screen gives errors

I probably can't help at all. I've just had my first experience with a small Adafruit OLED display and python and it took a fair bit of Googling and messing around to get it working. Good thing Adafruit have some good doco. I've put up a bit of a post at https://jandmf.com/index.php/2020/07/26/a-nea...
by Mark_F
Wed Jul 15, 2020 1:55 am
Forum: Off topic discussion
Topic: Worst "production" Pi hardware installation
Replies: 26
Views: 2307

Re: Worst "production" Pi installation

I don't see a problem - all my Pis are mounted like this. It has the advantage that you can't drop a screwdriver on it, and it can't accidentally touch a conductive surface. Though admittedly I think the ethernet cable should have a half-hitch to hold it in place, otherwise it'll unthread itself wh...
by Mark_F
Fri Jul 03, 2020 7:30 am
Forum: General discussion
Topic: dmesg curiosity
Replies: 5
Views: 376

Re: dmesg curiosity

It's not a problem, it's just the system polling for an sd card that isn't there. If it happens with an sd card present it might indicate a failing sd card. Maybe a curiosity would better describe it. My questions about it first appearing at Jul 2 00:00:12 still stand though. While the sd_poll_once...
by Mark_F
Fri Jul 03, 2020 2:45 am
Forum: General discussion
Topic: Is it possible to have a "cluster" of Raspberry Pis?
Replies: 107
Views: 3337

Re: A silly question perhaps

Welcome to the Forum. Short answer: no. Longer answer: It is possible to "cluster" Pis and use specially written software to distribute tasks over all the Pis. But the lack of any really fast interconnects stops such a system working like a single processor with multiple cores. The interconnect tha...
by Mark_F
Fri Jul 03, 2020 1:42 am
Forum: General discussion
Topic: dmesg curiosity
Replies: 5
Views: 376

Re: dmesg curiosity

I have found when the problem started - Jul 2 00:00:12. Up until then that message never appeared. USB booting was implemented on June 27 so it wasn't an artefact of USB booting. That leads me to believe that there were changes made just before the problem started. These changes, whatever they were,...
by Mark_F
Thu Jul 02, 2020 9:47 am
Forum: General discussion
Topic: dmesg curiosity
Replies: 5
Views: 376

Re: dmesg curiosity

Use the sd_poll_once DT param to turn off MMC scanning. You lose hotplug of the SD card though IIRC. Thank you Sir. It seems to work like a charm. I must admit that I haven't done as much reading of the config.txt doco as I should have. Losing the SD card is no great loss - the main reason I went w...
by Mark_F
Thu Jul 02, 2020 7:41 am
Forum: General discussion
Topic: dmesg curiosity
Replies: 5
Views: 376

dmesg curiosity

Hi folks, At regular 30 second intervals I get from "dmesg --ctime" the following [Thu Jul 2 17:28:45 2020] mmc0: Timeout waiting for hardware cmd interrupt. [Thu Jul 2 17:28:45 2020] mmc0: sdhci: ============ SDHCI REGISTER DUMP =========== [Thu Jul 2 17:28:45 2020] mmc0: sdhci: Sys addr: 0x0000000...
by Mark_F
Mon Jun 29, 2020 2:49 am
Forum: General discussion
Topic: STICKY: USB-MSD boot EEPROM fourth update - 2020-06-15
Replies: 193
Views: 38148

Re: STICKY: USB-MSD boot EEPROM third update - 2020-06-15

Success. Seagate 1TB SSD works fine. The only trouble I had is doing rsync from one SSD to another when both are connected to USB-3 ports. There's no trouble when going from USB-3 to USB-2. I suspect that it is a power problem however even though I'm using a genuine Raspberry power supply. https://j...
by Mark_F
Fri May 29, 2020 2:56 pm
Forum: General discussion
Topic: STICKY: Raspberry Pi OS (64 bit) beta test version feedback
Replies: 442
Views: 87674

Re: Raspberry Pi OS (64 bit) beta test version

Just for giggles...................... I already have my Pi 4 ( 4GB ) with the BETA bootloader for USB-MSD so..................... Yesterday evening I found a 16GB USB flash drive, downloaded the 64 bit image and flashed it to the drive. Plugged it into my Pi and turned it on. :o It booted straight...
by Mark_F
Sat May 16, 2020 2:08 pm
Forum: General discussion
Topic: 12v battery state of discharge with buck convertor
Replies: 1
Views: 172

Re: 12v battery state of discharge with buck convertor

Although I haven’t looked instructables.com will probably have a simple circuit. Look for BMS with low voltage cutoff.
by Mark_F
Sun May 03, 2020 5:32 am
Forum: General discussion
Topic: VLC curiosity
Replies: 6
Views: 598

Re: VLC curiosity

jerryrp wrote:
Sun May 03, 2020 4:34 am
Looks like vlc is working as it should right now (after today's update).
Yep it appears fixed. Video is smooth and CPU usage is back to where it was - about 5%. Good work.
by Mark_F
Sun May 03, 2020 12:53 am
Forum: General discussion
Topic: VLC curiosity
Replies: 6
Views: 598

Re: VLC curiosity

See https://www.raspberrypi.org/forums/viewtopic.php?f=66&t=272835&p=1653695#p1653695 And that appears to be the problem. It was all good before the upgrade and no good after. Now all I have to do is to work out how to roll back to the previous version. I suspect that this could be a whole new adve...
by Mark_F
Sat May 02, 2020 3:16 pm
Forum: General discussion
Topic: VLC curiosity
Replies: 6
Views: 598

VLC curiosity

Hi all, Today (02 May 2020) I did an "apt update" followed by a "apt full-upgrade". I noticed that vlc was one of the upgrade targets. Since the upgrade vlc has been jerky with bad lip sync. VLC CPU usage seems to be a lot higher than it was and the temp, normally less than 40 deg C is now running a...
by Mark_F
Wed Apr 29, 2020 11:23 pm
Forum: General discussion
Topic: Disappointment: why Raspberry Pi 4 was made exclusively for the "Linux Market"?
Replies: 98
Views: 7623

Re: Disappointment: why Raspberry Pi 4 was made exclusively for the "Linux Market"?

The ver first computer I had anything to do with was a Honeywell H800 with 3/4” tapes and 8K of memory. It’s processing speed was about the same as pencil and paper. Well, maybe a little bit faster.

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