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by Ernst
Tue Nov 26, 2019 3:24 pm
Forum: Troubleshooting
Topic: Pi4: Chromium Browser Causes frequent hangs (5 seconds or so duration)
Replies: 15
Views: 409

Re: Pi4: Chromium Browser Causes frequent hangs (5 seconds or so duration)

jamesh wrote:
Tue Nov 26, 2019 2:33 pm
Interesting, not seen it on Pi, but I do get occasional pauses of about 10s on my x86 laptop (I7, 16GB RAM) when using Chrome. So I don't think it's limited to the Pi, or even the ARM architecture.
Lately I see this occasionally on my Samsung TAB S4.
by Ernst
Thu Nov 21, 2019 8:31 pm
Forum: Advanced users
Topic: How to hw-disable the Raspbery Pi-4 Wlan-/Sd-Card Controller CYW 43455 (aka BCM43438)
Replies: 29
Views: 1100

Re: How to hw-disable the Raspbery Pi-4 Wlan-/Sd-Card Controller CYW 43455 (aka BCM43438)

consuli wrote:
Thu Nov 21, 2019 7:48 pm
P.S.: Who is Mr Leitner?
Most likely somebody capable of reading and interpreting the cypress technical documents.

The answer to your question can be found here: https://www.raspberrypi.org/forums/view ... 1#p1566932

Please stop trolling, I am out of this conversation.
by Ernst
Thu Nov 21, 2019 1:15 pm
Forum: Advanced users
Topic: How to hw-disable the Raspbery Pi-4 Wlan-/Sd-Card Controller CYW 43455 (aka BCM43438)
Replies: 29
Views: 1100

Re: How to hw-disable the Raspbery Pi-4 Wlan-/Sd-Card Controller CYW 43455 (aka BCM43438)

Your one substantive "clarification": ... guaranteeing no traffic on the SD bus [from SoC SD host controller to SDIO device] is misleading, since it implies that traffic in the reverse direction is possible. It isn't. [from SoC SD host controller to SDIO device] refers to the SD bus, not the traffi...
by Ernst
Thu Nov 21, 2019 1:01 pm
Forum: Advanced users
Topic: How to hw-disable the Raspbery Pi-4 Wlan-/Sd-Card Controller CYW 43455 (aka BCM43438)
Replies: 29
Views: 1100

Re: How to hw-disable the Raspbery Pi-4 Wlan-/Sd-Card Controller CYW 43455 (aka BCM43438)

IMHO there is some confusion, I have made some changes in the quoted text: Please see PhilE's post above for what SDIO is actually present on the Pi4. But for completeness, I'll quote it here. To confirm what others have said, the SoCs have two SD host controllers (actually three on the BCM2711 in P...
by Ernst
Thu Nov 21, 2019 11:53 am
Forum: Advanced users
Topic: How to hw-disable the Raspbery Pi-4 Wlan-/Sd-Card Controller CYW 43455 (aka BCM43438)
Replies: 29
Views: 1100

Re: How to hw-disable the Raspbery Pi-4 Wlan-/Sd-Card Controller CYW 43455 (aka BCM43438)

This all would be avoidable, I guess, I you guys would have been more nice, and just showed me how to properly hardware disconnect the CYW43455, for instance by cutting its wiring! Why cut ? If you ask nicely you can have a Pi 4 customized without the CYW43455. https://www.element14.com/community/d...
by Ernst
Wed Nov 20, 2019 6:39 pm
Forum: Advanced users
Topic: How to hw-disable the Raspbery Pi-4 Wlan-/Sd-Card Controller CYW 43455 (aka BCM43438)
Replies: 29
Views: 1100

Re: How to hw-disable the Raspbery Pi-4 Wlan-/Sd-Card Controller CYW 43455 (aka BCM43438)

jamesh wrote:
Wed Nov 20, 2019 5:22 pm
But more to the point, where did you get that logic diagram from? Doesn't appear to be an official release.
c't Magazine, issue 20, 14.09.2019, page 166.
also available at https://www.heise.de/ct/artikel/Raspber ... 14399.html
by Ernst
Tue Nov 19, 2019 4:17 pm
Forum: Troubleshooting
Topic: Pi4 disconnecting USB 3.0 Hard drives when 2 are connected
Replies: 5
Views: 128

Re: Pi4 disconnecting USB 3.0 Hard drives when 2 are connected

but if it has 2x usb 3.0 ports it should be able to support 2 devices being plugged in Just because there are multiple ports doesn't mean there is unlimited power available. You have a total of 1.2A across all 4 ports in total and this is assuming you have a good quality 3A PSU. The USB 3 standard ...
by Ernst
Fri Nov 15, 2019 12:08 pm
Forum: Beginners
Topic: Crontab not running
Replies: 3
Views: 126

Re: Crontab not running

Hi all. I'm sure Im doing something stupid but I cant get any crontab jobs to run :0( Even a simple one like this does nothing 1 * * * * sudo touch /home/pi/test.txt that command works from the command prompt. I've tried crontab -e and sudo crontab -e , neither work. Any ideas? Cheers Ned 1 * * * *...
by Ernst
Wed Nov 13, 2019 8:16 pm
Forum: General discussion
Topic: Raspberry 3 unavailable in Europe
Replies: 5
Views: 288

Re: Raspberry 3 unavailable in Europe

tampe125 wrote:
Wed Nov 13, 2019 6:08 pm
Hello,

I'm trying to purchase some Raspberry Pi 3, but it seems that every distributor in Europe is out of stock, both models B and B+.
Do you know what's going on?
How many do you need ?

Raspberry Pi 3B - 1792 available
Raspberry Pi 3B+ - 193 available
by Ernst
Mon Nov 11, 2019 10:06 pm
Forum: Off topic discussion
Topic: Logic NOPE gate IC
Replies: 20
Views: 945

Re: Logic NOPE gate IC

Ernst, Wonderful, simple humor from an age of innocence. We are not allowed to joke like that anymore in the age of CoCs and such. I just added a link to the original magazine, just looking at a few of the issues was very interesting (and brought back memories). https://www.americanradiohistory.com...
by Ernst
Mon Nov 11, 2019 9:49 pm
Forum: Off topic discussion
Topic: Logic NOPE gate IC
Replies: 20
Views: 945

Re: Logic NOPE gate IC

Elektor announces new logic Beek, Limburg, 1 Apr. 1984- Elektor, one of the world’s major suppliers of kits and components, today announces a new line of feminine logic which is now- available from stock to Elektor readers. The first device in this new logic family is called the 'Maybe’ gate. Its ne...
by Ernst
Fri Nov 08, 2019 2:35 pm
Forum: Advanced users
Topic: "Write only" backup target
Replies: 2
Views: 103

Re: "Write only" backup target

Hi all, I'd like to transform my Pi4 into a backup target. ... What do you think? Does that make sense? Do you see a better way to achieve the goal of minimizing the risk of viruses causing trouble on the RAID array? too complex, too slow, too many variables. If you really want to go this deep I wo...
by Ernst
Thu Nov 07, 2019 9:40 am
Forum: General discussion
Topic: Interesting interview with Eben in Physics World
Replies: 41
Views: 1760

Re: Interesting interview with Eben in Physics World

The SD card solution is just too unreliable for 24/7 running...and each Pi would need a UPS plus some really good noise suppression on the incoming mains... pi@raspi4:~ $ uprecords # Uptime | System Boot up ----------------------------+--------------------------------------------------- 1 204 days,...
by Ernst
Mon Nov 04, 2019 4:14 pm
Forum: Troubleshooting
Topic: Swapping X Y on Touchscreen
Replies: 3
Views: 355

Re: Swapping X Y on Touchscreen

Has anyone an answer or stepped over the same issue? This post should give enough information to find a solution: https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=253959&p=1549853#p1549853 and some more: https://askubuntu.com/questions/920051/how-to-rotate-touch-screen-input-on-ubuntu-16-04
by Ernst
Sun Nov 03, 2019 1:11 pm
Forum: General discussion
Topic: Recover root password, NOT!! reset password
Replies: 20
Views: 1971

Re: Recover root password, NOT!! reset password

Basher52 wrote:
Sat Nov 02, 2019 11:08 pm
I wonder with a very low belief that it's possible.
How do I RECOVER the root password? I can NOT reset it as the whole system uses the same root password so it won't work.
Are you sure that a root password has been set on this system ?
by Ernst
Thu Oct 31, 2019 2:27 pm
Forum: Troubleshooting
Topic: unable to update
Replies: 3
Views: 163

Re: unable to update

I am still learning the system but I tried to update my Pi3 and I get this message when I did a sudo apt-get update pi@raspberrypi:~ $ sudo apt-get update E: Type '<!DOCTYPE' is not known on line 1 in source list /etc/apt/sources.list.d/rpimonitor.list E: The list of sources could not be read. pi@r...
by Ernst
Wed Oct 30, 2019 7:42 pm
Forum: General discussion
Topic: Raspberry Pi 3 A+ in Gadget Mode
Replies: 3
Views: 297

Re: Raspberry Pi 3 A+ in Gadget Mode

It might be possible that your host keys got corrupted on the initial startup, like if you removed power after first boot.

What you can try is to regenerate the host keys:

Code: Select all

sudo rm /etc/ssh/ssh_host*
sudo ssh-keygen -A
by Ernst
Thu Oct 24, 2019 8:35 am
Forum: Troubleshooting
Topic: Recourse for probable defective unit
Replies: 35
Views: 2161

Re: Just in: response from Micro Center

I asked them to read this forum string in conjunction to my replacement request... Micro Center Response.jpg Quite a few years ago I was experiencing BSODs (Blue Screen Of Death) on my Windows PC with a very unusual error code after several months of operation. With the use of memtest86 I found tha...
by Ernst
Wed Oct 23, 2019 6:24 pm
Forum: Advanced users
Topic: Making A Raspberry Pi Zero Cluster/Hub
Replies: 9
Views: 681

Re: Making A Raspberry Pi Zero Cluster/Hub

Hey, I need to make a cluster/hub of 10-20 Raspberry zeroes for a new project I am working on. These are the requirements: Each Pi should have 2 normal USB2.0 ports. Each Pi should have it’s own SD card slot. All the Pi’s should share 1 ethernet cable port. All the Pi’s should share 1 power supply ...
by Ernst
Mon Oct 21, 2019 8:27 am
Forum: General discussion
Topic: Pi 3 A +. What is it for?
Replies: 52
Views: 2620

Re: Pi 3 A +. What is it for?

Pretty much any experienced software engineer can tell stories of days, weeks, spent debugging a problem only to find at the end of it that the fix is a one line change. In the last four weeks I have been debugging an open source gcc based compiler that has been producing one error under Buster wit...
by Ernst
Sun Oct 20, 2019 5:17 pm
Forum: Beginners
Topic: Problem with send mail, it insists to send a copy to root
Replies: 16
Views: 641

Re: Problem with send mail, it insists to send a copy to root

IMHO I think your problem could be the from address in your email, I suggest you check the message send to gmail.
by Ernst
Sat Oct 19, 2019 9:24 pm
Forum: Off topic discussion
Topic: Auto locking threads
Replies: 26
Views: 3335

Re: Auto locking threads

Lock threads after 3-6 months of inactivity sounds sensible to me. New threads can easily be started if the issue reappears. Better than having people replying to out of date information. I fully agree with this. But it would be nice if moderators would be able to unlock threads on request for the ...
by Ernst
Mon Oct 14, 2019 8:57 pm
Forum: Troubleshooting
Topic: Raspberry Pi 4b - sudo reboot now - need to unplug power > 10seconds to recover (pisound HAT)
Replies: 33
Views: 1645

Re: Raspberry Pi 4b - sudo reboot now - need to unplug power > 10seconds to recover

subatomicglue wrote:
Mon Oct 14, 2019 8:41 pm
I'm gonna try the above with the latest Buster image, and will try without HDMI (skip touching the config.txt). Will report back
It would make sense to (physically) remove the pisound while testing.
by Ernst
Mon Oct 14, 2019 6:35 am
Forum: General discussion
Topic: can you do a raid with pis?
Replies: 7
Views: 847

Re: can you do a raid with pis?

hello I know you can do a raid on hard drives and I thought I found a video where you can do that with pis as well but I can't find it anymore, pretty much all the pis worked together as 1 computer, the main goal was to have each pi share the CPU Prosser, it would work kind of like a raid 5 if I am...

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