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by rpdom
Mon Aug 19, 2019 5:59 am
Forum: Troubleshooting
Topic: Raspberry Zero WH chip is too hot and WIFI, bluetooth not working
Replies: 1
Views: 25

Re: Raspberry Zero WH chip is too hot and WIFI, bluetooth not working

If the chip is getting hot it means it has been terminally damaged. It is dying and will get worse.

Sorry, but it cannot be saved.
by rpdom
Sun Aug 18, 2019 5:03 pm
Forum: Beginners
Topic: Setting up second eth interface
Replies: 6
Views: 212

Re: Setting up second eth interface

You could create a bridge interface and link the two physical interfaces to it. The IP address would belong to the bridge and could be accessed via either interface.
by rpdom
Sun Aug 18, 2019 1:22 pm
Forum: Troubleshooting
Topic: Slow Ethernet Speed with RP 3
Replies: 2
Views: 26

Re: Slow Ethernet Speed with RP 3

Why is internet speed so slow to RaspberryPi? Is it? I don't have 1Gb internet, just (in theory) 100Mb down and 6Mb up. These are my results from speedtest on a Pi 4B with fully updated Raspbian Buster Lite. Retrieving speedtest.net configuration... Testing from [redacted] Retrieving speedtest.net ...
by rpdom
Sun Aug 18, 2019 1:02 pm
Forum: Troubleshooting
Topic: Permanently disable swap on Raspbian Buster
Replies: 52
Views: 1449

Re: Permanently disable swap on Raspbian Buster

Like this ... https://www.redhat.com/en/blog/do-we-really-need-swap-modern-systems PeterO Interesting the the "recommended" amount of swap nowadays is 20% of RAM size. Back in the "stone age" of Unix it was about 120% of RAM size. But RAM was slow and disks were still slower, but the systems I star...
by rpdom
Sun Aug 18, 2019 12:22 pm
Forum: Troubleshooting
Topic: Any workaround for USB HUB STT?
Replies: 9
Views: 193

Re: Any workaround for USB HUB STT?

I wasn't aware that the 4B doesn't suffer from this limitation. Good to know but can you provide a supporting link please. https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=243372&start=225#p1484595 32 devices (not endpoints now) maximum on the new USB, plus 6 on the old one on the USB C conn...
by rpdom
Sun Aug 18, 2019 12:12 pm
Forum: Troubleshooting
Topic: apt update issues
Replies: 4
Views: 92

Re: apt update issues

But the thing is they don't have the same names. Yes, they are all "Packages.xz" and they are all from the same "http:////raspbian.raspberrypi.org/" server, but the path names of each file are different. If your proxy/cache is considering them to be the same it has a serious bug in it. This shows th...
by rpdom
Sun Aug 18, 2019 9:11 am
Forum: Troubleshooting
Topic: Pi 4, rootfs on SSD goes readonly
Replies: 11
Views: 425

Re: Pi 4, rootfs on SSD goes readonly

There was a thread recently that had a link to a page that had some updated firmware for a JMicron USB3-SATA interface and an installer that works on a Pi 2 or above. I used it to upgrade my el-cheapo USB3.0-SATA adaptor and it stopped having the UAS errors that have been reported with some chipsets...
by rpdom
Sun Aug 18, 2019 9:06 am
Forum: Advanced users
Topic: Avoiding circular symlinks in an install script
Replies: 18
Views: 235

Re: Avoiding circular symlinks in an install script

Hard links do not “must”, point to the same inode as the original file, they do by nature. I don’t see that should be a problem. Perhaps you meant to say the files are not on the same device, hence you cannot use hard links? No, they are not in the same inode. Well, of course different files are no...
by rpdom
Sun Aug 18, 2019 9:00 am
Forum: Troubleshooting
Topic: Permanently disable swap on Raspbian Buster
Replies: 52
Views: 1449

Re: Permanently disable swap on Raspbian Buster

Hmm, ok. Looks like I sit corrected. The figure for swappiness on the Pi seems to be the default of 60 now (cat /proc/sys/vm/swappiness). It used to be something like 1 to prevent swap to the SD card except in extreme cases.

Still, none of my Pi are swapping. Even the one with 256MB.
by rpdom
Sun Aug 18, 2019 8:44 am
Forum: Troubleshooting
Topic: RASPBERRY PI 4 GIGABIT PORT SPEED
Replies: 6
Views: 158

Re: RASPBERRY PI 4 GIGABIT PORT SPEED

Also, there apparently is a bug in the speedetest-cli in Buster that shows lower speeds than is available. There are later versions available through something called pip (wasn't that something on CP/M?) that fixed that bug.
by rpdom
Sun Aug 18, 2019 8:40 am
Forum: Advanced users
Topic: Avoiding circular symlinks in an install script
Replies: 18
Views: 235

Re: Avoiding circular symlinks in an install script

rin67630 wrote:
Sun Aug 18, 2019 5:03 am
rpdom wrote:
Sun Aug 18, 2019 4:52 am
Use a hard link instead of a symlink?
In the original program? Funny.
Why do you think the whole procedure was done that way?
Well, looking at that script I'd say it was because you need to learn more about writing scripts.
by rpdom
Sun Aug 18, 2019 8:36 am
Forum: Raspbian
Topic: Menu editor, how to make the terminal open full screen?
Replies: 6
Views: 395

Re: Menu editor, how to make the terminal open full screen?

Maybe lxterminal doesn't have a "fullscreen" options, but you can specify a geometry (columns and rows) that will fill your screen in the font you have defined.
by rpdom
Sun Aug 18, 2019 8:31 am
Forum: General discussion
Topic: No internal cpu temp or voltage sensor on Pi 4?
Replies: 5
Views: 269

Re: No internal cpu temp or voltage sensor on Pi 4?

There is a basic power supply voltage monitor, but it only says if the voltage is high enough or not. It can be accessed through some of the flags on vcgencmd get_throttled.

One of the chip internal voltages can be measured with vcgencmd measure_volts
by rpdom
Sun Aug 18, 2019 8:21 am
Forum: Troubleshooting
Topic: apt update issues
Replies: 4
Views: 92

Re: apt update issues

Packages appears to gone from 13MB to 18.3MB and then to 69MB. Are there 3 sets of Packages? No, there are five sets of packages files in your set up. But two of them haven't changed since last time you did an apt update, so they didn't need to be downloaded again "Ign:" For this line in your sourc...
by rpdom
Sun Aug 18, 2019 4:52 am
Forum: Advanced users
Topic: Avoiding circular symlinks in an install script
Replies: 18
Views: 235

Re: Avoiding circular symlinks in an install script

Use a hard link instead of a symlink?
by rpdom
Sun Aug 18, 2019 3:27 am
Forum: Troubleshooting
Topic: Any workaround for USB HUB STT?
Replies: 9
Views: 193

Re: Any workaround for USB HUB STT?

What is the rating of the power supply for the hub? As thagrol said, most 7-port USB hubs contain two 4-port USB hub chips with the last port of the first chip linked to the upstream port of the second chip, and there is a limit on the number of USB endpoints (logical devices) that can be connected ...
by rpdom
Sat Aug 17, 2019 10:05 pm
Forum: General discussion
Topic: Lightweight word processor (alternative to LibreOffice Writer)?
Replies: 25
Views: 602

Re: Lightweight word processor (alternative to LibreOffice Writer)?

W. H. Heydt wrote:
Sat Aug 17, 2019 8:38 pm
One of the first things I do on a new Raspbian image is to add "export EDITOR=/usr/bin/vi" to the end of /etc/profile.
I do

Code: Select all

sudo update-alternatives --set editor /usr/bin/vim.tiny
by rpdom
Sat Aug 17, 2019 4:52 pm
Forum: Troubleshooting
Topic: Permanently disable swap on Raspbian Buster
Replies: 52
Views: 1449

Re: Permanently disable swap on Raspbian Buster

That would be my assumption, but low-use memory pages (other than cache) could be swapped to make room for disk cache in some circumstances (at least in a server -- not sure it would happen on a typical desktop). It still should not happen while RAM is available. That's what the "swapiness" paramet...
by rpdom
Sat Aug 17, 2019 2:09 pm
Forum: Troubleshooting
Topic: Permanently disable swap on Raspbian Buster
Replies: 52
Views: 1449

Re: Permanently disable swap on Raspbian Buster

It's counterintuitive, and a well known fact since the 1990s. Every Unix and Linux system I've used since the early 1980s has had swap space. I've managed some large systems where swap has allowed them to keep running during peaks in load which would have otherwise brought them to a standstill. Pet...
by rpdom
Sat Aug 17, 2019 6:54 am
Forum: Beginners
Topic: Can i produce a depth map using two cameras connected to two different raspberry pi's?
Replies: 12
Views: 322

Re: Can i produce a depth map using two cameras connected to two different raspberry pi's?

Well, I'll also be using PIR sensors for my project so i need GPIO pins which i guess doesn't come with Zero W? The PiZero have GPIO, it just doesnt always come with the pin-header presoldered. You can do it youself or solder wires directly if you want. The Pi Zero WH has the header presoldered.
by rpdom
Sat Aug 17, 2019 5:36 am
Forum: Troubleshooting
Topic: pi 4 32GB sd card doesn't work.
Replies: 24
Views: 731

Re: pi 4 32GB sd card doesn't work.

If you enable ssh on Raspbian (either through raspi-config and reboot, or by creating a "ssh" or "ssh.txt" file in /boot, you should be able to connect to it. This applies to all recent varieties of Raspbian. As to why manjaro doesn't work on your 32GB cards - I don't know. I've never tried it. I st...
by rpdom
Sat Aug 17, 2019 5:27 am
Forum: Troubleshooting
Topic: pi 4 32GB sd card doesn't work.
Replies: 24
Views: 731

Re: pi 4 32GB sd card doesn't work.

I don't get green LED errors related to an EEPROM issue, however at this point may it be worth it to flash it anyway? No point. If the Pi boots from the 8GB cards then there is nothing wrong with the contents of the EEPROM. It looks like the Pi is booting fine, just not outputting to the HDMI for s...
by rpdom
Sat Aug 17, 2019 5:17 am
Forum: General discussion
Topic: Pi Zero W, VS 3B+, VS 4 for low CPU applications?
Replies: 24
Views: 715

Re: Pi Zero W, VS 3B+, VS 4 for low CPU applications?

alphanumeric wrote:
Sat Aug 17, 2019 12:00 am
Pimoroni have a Hyperpixel GPIO connected touch screen display that is 720x720 pixels (~254 PPI) and 60 FPS frame rate.
Weird size...

It uses the DPI interface on the GPIO pins, the same as Gert's VGA666 board does although to drive a different interface. DPI is capable of 1280x1024 at least.
by rpdom
Fri Aug 16, 2019 9:43 pm
Forum: General discussion
Topic: I got a big issue and i need to fix it before next week
Replies: 26
Views: 1328

Re: I got a big issue and i need to fix it before next week

I am prepared to give them the benefit of the doubt although my tribble senses are tingling. Going by your avatar, shouldn't that be "my spidey senses are tingling" ? :D Nope. The spiders (like Nightshade* in my userpic) belong to my wife/ *He's something of an anomaly. Fully grown males of his spe...
by rpdom
Fri Aug 16, 2019 7:57 pm
Forum: General discussion
Topic: I got a big issue and i need to fix it before next week
Replies: 26
Views: 1328

Re: I got a big issue and i need to fix it before next week

Really??? Can nobody spot a troll anymore? He has chosen the name of "vidgusting", has made only one post and it consists of an incoherent ramble about how he has searched high and low yet has somehow managed to find no information about his problem. Actually seven posts, but they were all the same...

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