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by rew
Sat Jun 12, 2021 6:02 am
Forum: General discussion
Topic: Porting old Pi3 distribution to pi4.
Replies: 27
Views: 1141

Re: Porting old Pi3 distribution to pi4.

It goes back deeper than the kernel. A lot of what is in the "BIOS" on a PC is in "firmware" files on the Pi. Using an earlier image will have files that don't know anything about the newer Pi. For one it won't know about critical memory timing details and there is a lot more. T...
by rew
Fri Jun 11, 2021 4:25 pm
Forum: General discussion
Topic: Porting old Pi3 distribution to pi4.
Replies: 27
Views: 1141

Re: Porting old Pi3 distribution to pi4.

Just repeating the official documentation: you need a newer release is not helping. Of course the foundation cannot spend too much trouble maintaining the old releases of the OS. So instead of back-porting whatever was necessary to make buster work on pi4, they just say: not supported you're on your...
by rew
Fri Jun 11, 2021 8:54 am
Forum: General discussion
Topic: Porting old Pi3 distribution to pi4.
Replies: 27
Views: 1141

Porting old Pi3 distribution to pi4.

Hi, A friend has a complex application that he's managed to get working on a pi3. But already a while now, there is the PI4. He says that he's found it impossible to get the application working on a pi4 with a modern distribution. Lets not question that and take that as a given. I said: It should be...
by rew
Thu Dec 10, 2020 3:06 pm
Forum: General discussion
Topic: Finding download images.
Replies: 13
Views: 979

Re: Finding download images.

Tries to determine the locale to load some standard Qt translated strings (for generic stuff like the names of the days of the week in your local language). I hate it when such unnecessary (i.e. not used by me) features cause a regression for me. After the upgrade to 20.04 geeqie on my fileserver s...
by rew
Thu Dec 10, 2020 11:53 am
Forum: General discussion
Topic: Finding download images.
Replies: 13
Views: 979

Re: Finding download images.

With only the last debug flag the full output is: QQmlImportDatabase::addImportPath: "/usr/lib/x86_64-linux-gnu/qt5/qml" QQmlImportDatabase::addImportPath: "qrc:/qt-project.org/imports" QQmlImportDatabase::addImportPath: "/usr/bin" Segmentation fault (core dumped) From ...
by rew
Thu Dec 10, 2020 11:05 am
Forum: General discussion
Topic: Finding download images.
Replies: 13
Views: 979

Re: Finding download images.

Nope. Still "Segmentation fault (core dumped)" Edit / update: It does work on my other 20.04 workstation 3km down the road. Just to be clear: You're trying to figure out why it doesn't work for some people, to help improve rpi-imager experience for other people than me. I'm happy to help. ...
by rew
Thu Dec 10, 2020 9:18 am
Forum: General discussion
Topic: Finding download images.
Replies: 13
Views: 979

Re: Finding download images.

getafix:~/Desktop> setenv QT_DEBUG_PLUGINS 1 getafix:~/Desktop> echo $QT_DEBUG_PLUGINS 1 getafix:~/Desktop> gdb -ex run /usr/bin/rpi-imager GNU gdb (Ubuntu 9.2-0ubuntu1~20.04) 9.2 Copyright (C) 2020 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/g...
by rew
Wed Dec 09, 2020 10:03 pm
Forum: General discussion
Topic: Finding download images.
Replies: 13
Views: 979

Re: Finding download images.

yes.
by rew
Wed Dec 09, 2020 12:17 pm
Forum: General discussion
Topic: Finding download images.
Replies: 13
Views: 979

Re: Finding download images.

Oh. Great!
I don't like, it ,but I installed the promoted "rpi-imager". When I run that I get "segmentation fault, core dumped". Let me reiterate that I prefer doing it the oldfashioned way.
by rew
Wed Dec 09, 2020 12:14 pm
Forum: General discussion
Topic: Finding download images.
Replies: 13
Views: 979

Finding download images.

Hi, Normally when I want to install a new pi, I google for raspberry pi os download and get to the download page. There I download the image I want and dd it to my SD card. Today all links end up at https://www.raspberrypi.org/software/ where I can download some software for my Ubuntu host system, b...
by rew
Sun Nov 08, 2020 4:39 pm
Forum: General discussion
Topic: STICKY: Raspberry Pi OS (64 bit) beta test version feedback
Replies: 995
Views: 264222

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

Feedback: It looks as "abandonware" from here in nov 2020: There is a more recent raspbian OS 32bit but nothing since may for the 64bit version. Incase there is an answer: But you can download the latest version ... When searching for the 64bit version I found the announcement with a direc...
by rew
Mon Jul 20, 2020 1:15 pm
Forum: Troubleshooting
Topic: Operation not possible due to RF-kill
Replies: 10
Views: 24552

Re: Operation not possible due to RF-kill

OK guys for the future (probably me searching for this problem again in a year or so).... The boot scripts softblock the wlan when you haven't entered your country in raspi-config -> localisation options -> Change WLAN Country I would REALLY like to know what file this changes, as I wasted a lot of ...
by rew
Thu Jul 16, 2020 5:00 am
Forum: Troubleshooting
Topic: PI4 crashes with USB3 connected hub.
Replies: 6
Views: 1545

Re: PI4 crashes with USB3 connected hub.

When a while ago the system crashed again and then the 32Tb RAID didn't come back. I have experience (due to this) of getting it back manually after a crash due to this, but this time it was corrupted beyond repair. (I had copied some data onto it, which took one or two months to copy.) The pi4 and ...
by rew
Fri May 29, 2020 9:06 pm
Forum: General discussion
Topic: Driver for ZJ9200 Label printer.
Replies: 16
Views: 2551

Re: Driver for ZJ9200 Label printer.

FYI: On the Dymo 450 labelprinter, I found a setting that helped print jobs more quickly after eachother. It was something like: printer-is-write-only, cupsd was waiting for the printer to say something back and that would cause a 5s wait after each job. This makes a difference when you print severa...
by rew
Fri May 22, 2020 9:40 am
Forum: General discussion
Topic: Driver for ZJ9200 Label printer.
Replies: 16
Views: 2551

Re: Driver for ZJ9200 Label printer.

Still.... I think the printer is expecting some more data that the previous job didn't send. Maybe the driver crashes after sending most of the data, but with some data still buffered causing a reasonable print, but the firmware is still expecting a few more bytes. (odd that it would still print, bu...
by rew
Wed May 20, 2020 7:10 pm
Forum: General discussion
Topic: Driver for ZJ9200 Label printer.
Replies: 16
Views: 2551

Re: Driver for ZJ9200 Label printer.

While getting my '9200 to print.... I made a mistake of sending: "you'll get XXX bytes of binary data starting <now>" , but the XXX was much more than what was actually sent. In my case, it took me a while before I understood why nothing was happening anymore. From your description it soun...
by rew
Wed May 20, 2020 5:23 pm
Forum: General discussion
Topic: Driver for ZJ9200 Label printer.
Replies: 16
Views: 2551

Re: Driver for ZJ9200 Label printer.

Oh... I discarded that route as the test-print I found in my printer when I got it mentioned "TSPL" and the ZJ-58 driver does not produce something that resembles TSPL..... It seems that writing the driver isn't too much of a problem after all: Done! Not a cups-driver yet, I might try that...
by rew
Wed May 20, 2020 2:58 pm
Forum: General discussion
Topic: Driver for ZJ9200 Label printer.
Replies: 16
Views: 2551

Re: Driver for ZJ9200 Label printer.

Well.... Yeah, I know they might think of Linux support as supplying an x86 binary being sufficient Linux support. In this case, I'm being pushed to try if the APK works. (I told him: "won't work, that's for android", then I get please try anyway...) Anyway, with an X86 binary I might stil...
by rew
Wed May 20, 2020 10:51 am
Forum: General discussion
Topic: Driver for ZJ9200 Label printer.
Replies: 16
Views: 2551

Driver for ZJ9200 Label printer.

Hi all, hope you're all well in these difficult times. I've bought a 100mm labelprinter on Aliexpress where the seller confidently told me there was Linux support for his printer. All the others were a bit vague. So I went with this one. So now I seem to have a $90 paperweight..... The printer seems...
by rew
Sat Feb 29, 2020 10:16 am
Forum: General discussion
Topic: Stability of raspberry pi with big disks.
Replies: 6
Views: 1010

Re: Stability of raspberry pi with big disks.

What errors are you seeing? Any error messages? What happens to the disks? Usually the system just hangs. (I get an "host unreachable" from the cronjob trying to ssh into the machine to do a "df"). Or "no IO happening anymore": I can still log in, but everything access...
by rew
Thu Feb 27, 2020 2:23 pm
Forum: General discussion
Topic: Stability of raspberry pi with big disks.
Replies: 6
Views: 1010

Stability of raspberry pi with big disks.

Hi, I decided that I needed a lot of "slow" storage and thought the new raspberry pi 4 would make a nice fileserver with decent performance for "slow" storage. Stuff like 200Mb/sec is not bad. I've been messing with this for half a year now. but it has proven to be impossible to ...
by rew
Thu Feb 27, 2020 11:55 am
Forum: General discussion
Topic: Undervoltage RasberryPi won't boot
Replies: 5
Views: 584

Re: Undervoltage RasberryPi won't boot

Well... The arduino doesn't matter much. Expect about 20mA for that one.
by rew
Tue Feb 04, 2020 5:27 pm
Forum: Advanced users
Topic: Restricting Linux to say 3 cores.
Replies: 3
Views: 898

Restricting Linux to say 3 cores.

Hi, I'm building a system where I'm probably going to use a raspberry pi and a pi camera to process some images.... On the other hand, there are some real-time things that need to happen. The current plan is to use an STM32 for the real-time stuff (stepper motors e.d.). I was wondering. would it be ...
by rew
Mon Nov 04, 2019 10:38 am
Forum: Troubleshooting
Topic: PI4 crashes with USB3 connected hub.
Replies: 6
Views: 1545

Re: PI4 crashes with USB3 connected hub.

did you have a look at this post? https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=53832 Nope. It tells me to upgrade to the 2014 version of NOOBS..... Sounds outdated. And I've determined that it is related to USB3 being used. I've read it anyway, and found nothing relevant. Doing the a...
by rew
Mon Nov 04, 2019 7:57 am
Forum: Troubleshooting
Topic: PI4 crashes with USB3 connected hub.
Replies: 6
Views: 1545

PI4 crashes with USB3 connected hub.

I have a Pi4 running Ubuntu. I need the 64-bit kernel. I have 5 USB harddisks doing software raid5. As the pi doesn't have five USB3 ports, I use an USB3 HUB and one direct connection. Each of the five drives has its own 12V powersupply. The system has been very unstable.... Until two weeks ago, it ...

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