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by alnaseh
Wed Nov 03, 2021 2:35 am
Forum: Troubleshooting
Topic: Pi 0 2 w does not work with 64 Bit Raspberry Pi OS
Replies: 49
Views: 2346

Re: Pi 0 2 w does not work with 64 Bit Raspberry Pi OS

ladiesman6969 wrote:
Mon Nov 01, 2021 5:54 pm
The only reason I am using Pi OS 64 bit is because I want to run JavaFX/Java natively without JVM, which makes your startup speeds insanely fast and java apps use hardly any memory.
You can find the latest Java on 32bit in azul site. Maybe this will solve your issue
by alnaseh
Fri Oct 01, 2021 3:01 pm
Forum: Raspberry Pi OS
Topic: syscall pidfd is missing
Replies: 10
Views: 621

Re: syscall pidfd is missing

ok, I have upgraded to bullseye and recompiled the util-linux again. now the option "--timeout" is available and pidfd is supported

Code: Select all

kill from util-linux 2.37.2 (with: sigqueue, pidfd)
it was

Code: Select all

kill from util-linux 2.37.2 (with: sigqueue)
by alnaseh
Fri Sep 24, 2021 9:49 am
Forum: Beginners
Topic: How to use a bluetooth headet's microphone with the Raspberry Pi 4?
Replies: 11
Views: 2838

Re: How to use a bluetooth headet's microphone with the Raspberry Pi 4?

i have been searching on how to enable HFP/HSP for the onboarded bluetooth long time ago.
To keep it short, no one manage to get it works. it is not a software issue, there is no sound card in any Pi versions
by alnaseh
Sun Sep 19, 2021 1:05 pm
Forum: Raspberry Pi OS
Topic: syscall pidfd is missing
Replies: 10
Views: 621

Re: syscall pidfd is missing

it generates a fake function definition for "char pidfd_open()", and then tries to compile and link, but never runs it if libc provides that symbol, the linking will pass, and it should work thank you, i tried to do the same (if i understood correctly) without success. i will try to insta...
by alnaseh
Sun Sep 19, 2021 9:58 am
Forum: Raspberry Pi OS
Topic: syscall pidfd is missing
Replies: 10
Views: 621

Re: syscall pidfd is missing

cleverca22 wrote:
Sun Sep 19, 2021 9:50 am
and checking git blame, i can see it was added 2 years ago, so its very definitely in your kernel
yes, it is introduced in 5.3 so it is supposed to be available
https://man7.org/linux/man-pages/man2/pidfd_open.2.html
by alnaseh
Sun Sep 19, 2021 9:33 am
Forum: Raspberry Pi OS
Topic: syscall pidfd is missing
Replies: 10
Views: 621

syscall pidfd is missing

Hi, I'm trying to install (manually) util-linux "kill" command to use the "timeout" switch. after installing it seems this feature is missing also from kill command. after investigating it seems that this feature requires syscall pidfd. the logs shows checking for syscall pidfd_o...
by alnaseh
Wed Mar 31, 2021 10:02 am
Forum: General discussion
Topic: what is the maximum size of SD that a Raspberry Pi 4 can recognise?
Replies: 17
Views: 1920

Re: what is the maximum size of SD that a Raspberry Pi 4 can recognise?

I have read somewhere in this forum 256GB is the max. It might be changed with the current updates
by alnaseh
Mon Nov 30, 2020 1:02 pm
Forum: Camera board
Topic: RAW HQ data compression to reach 24fps goal
Replies: 31
Views: 2845

Re: RAW HQ data compression to reach 24fps goal

this is not correct, Pi support only 2 lanes and Nano board is only 2 lanes. also the native driver for both Pi & Nano doesnot support the 4 lanes. not sure what they are selling here. maybe im missing something here Lee said what he tested, imx477 sensor with 4 lanes connected to usb3 MIPI boa...
by alnaseh
Sun Nov 29, 2020 4:43 pm
Forum: Camera board
Topic: RAW HQ data compression to reach 24fps goal
Replies: 31
Views: 2845

Re: RAW HQ data compression to reach 24fps goal

there is something wrong i guess in the arducam. it says 4 lanes but at the same time it is supported by Pi0 and Nano out of the box ?! this is not correct, Pi support only 2 lanes and Nano board is only 2 lanes. also the native driver for both Pi & Nano doesnot support the 4 lanes. not sure wha...
by alnaseh
Wed Nov 25, 2020 7:08 am
Forum: Gaming
Topic: Pi 4 VR Headset
Replies: 15
Views: 3394

Re: Pi 4 VR Headset

Did you look for arducam, they have one board for stereo
There is also stereoPi
by alnaseh
Mon Nov 09, 2020 5:48 pm
Forum: Off topic discussion
Topic: What was your first computer?
Replies: 598
Views: 257488

Re: What was your first computer?

AST 95
by alnaseh
Mon Oct 26, 2020 2:42 pm
Forum: Advanced users
Topic: Can anyone running 5.4 kernel comment on exfat native support?
Replies: 11
Views: 1823

Re: Can anyone running 5.4 kernel comment on exfat native support?

not sure if i understand correctly but it is working in the current kernel 5.4 you can install the tools [exfat-fuse exfat-utils] and then use it normally e.g. mkfs.exfat ...... the file system itself is part of the kernal now If you're using exfat-fuse then you're not using the kernel driver for e...
by alnaseh
Mon Oct 26, 2020 12:51 pm
Forum: Advanced users
Topic: Can anyone running 5.4 kernel comment on exfat native support?
Replies: 11
Views: 1823

Re: Can anyone running 5.4 kernel comment on exfat native support?

not sure if i understand correctly but it is working in the current kernel 5.4

you can install the tools [exfat-fuse exfat-utils] and then use it normally e.g. mkfs.exfat ......

the file system itself is part of the kernal now
by alnaseh
Mon Jul 06, 2020 12:31 pm
Forum: General discussion
Topic: fstrim compatible SD cards
Replies: 7
Views: 2053

Re: fstrim compatible SD cards

Doesn't ext4 have the discard option enabled by default nowadays? (In which case it should already sent those commands when files are deleted, and running fstrim separately should not be necessary). not sure about this but i guess it will have the same effect of fstrim i.e. it might not work. the E...
by alnaseh
Sun Jul 05, 2020 1:04 pm
Forum: General discussion
Topic: fstrim compatible SD cards
Replies: 7
Views: 2053

Re: fstrim compatible SD cards

Doesn't ext4 have the discard option enabled by default nowadays? (In which case it should already sent those commands when files are deleted, and running fstrim separately should not be necessary). not sure about this but i guess it will have the same effect of fstrim i.e. it might not work. the E...
by alnaseh
Sun Jul 05, 2020 11:30 am
Forum: General discussion
Topic: fstrim compatible SD cards
Replies: 7
Views: 2053

Re: fstrim compatible SD cards

As you found out, fstrim issues CMD38 ERASE to SD card devices. This limits write-amplification in Flash memory. You can verify that trim works with: $ sudo fstrim / --verbose /: 17,1 GiB (18311340032 bytes) trimmed You should get an output similar to the one above. You can then start the fstrim.ti...
by alnaseh
Fri Jul 03, 2020 5:51 pm
Forum: General discussion
Topic: fstrim compatible SD cards
Replies: 7
Views: 2053

fstrim compatible SD cards

Hi, I'm trying to search for a compatible SD card that support fstrim. based on many threads and github issues, it seems that the backed SD protocol commands for fstrim is: CMD32 / CMD33 / CMD38 quick search and i found kingston SDCIT/64GB is supporting these commands: https://www.kingston.com/datas...
by alnaseh
Sat Mar 21, 2020 5:10 am
Forum: Graphics programming
Topic: GStreamer: record camera stream and sound in one container
Replies: 0
Views: 1091

GStreamer: record camera stream and sound in one container

Hi, I'm trying to get a pipeline that record the camera output and sound into one container. i tried many pipelines with success. the sound module is the one here: https://www.raspiaudio.com/raspiaudio-aiy following are some failed pipelines i got it from googling: raspivid -n -ih -fl -t 0 -stm -g 3...
by alnaseh
Thu Mar 05, 2020 10:23 am
Forum: For sale
Topic: Aluminum case for Raspberry Pi 4
Replies: 7
Views: 7980

Re: Aluminum case for Raspberry Pi 4

It will be great to fit the camera inside the closure with standard tripod mounting hole in the same way the following case:

https://www.datapro.net/products/rugged ... -case.html
by alnaseh
Tue Oct 08, 2019 6:13 pm
Forum: Off topic discussion
Topic: Best Raspberry Pi Alternatives 2019
Replies: 65
Views: 24877

Re: Best Raspberry Pi Alternatives 2019

Im my case i managed to get 140ms glass to glass latency with the max resolution 3280x2464 with 21fps on newer codec h265. They have very tight integration with gstreamer.
by alnaseh
Mon Oct 07, 2019 2:33 am
Forum: Off topic discussion
Topic: Best Raspberry Pi Alternatives 2019
Replies: 65
Views: 24877

Re: Best Raspberry Pi Alternatives 2019

I believe that Raspberry is leading the generic tinkering boards with very few alternatives in the market as a second choice.
But once you have a use case and you are willing to pay little bit more, you can find better options out there e.g. GPU and camera system.
by alnaseh
Fri Sep 27, 2019 11:33 am
Forum: General discussion
Topic: Update for Rpi Zero W?
Replies: 74
Views: 5678

Re: Update for Rpi Zero W?

Maybe recreate the soc with 45nm is also an option to increase the clock speed instead of the current 65nm. Plus other small things e.g. Wifi ac...
by alnaseh
Mon Aug 12, 2019 11:45 am
Forum: Camera board
Topic: my zero w system lockups when using the camera [solved]
Replies: 23
Views: 23002

Re: Fixed my zero w system lockups when using the camera

I will share my experience as well, i have been facing all kinds of crashes using the camera and opencv. I tried alomost everything but the processor is just weak enough. On the other one thing helps a lot, reducing the priority of my processes. Yes not increasing but decreasing to the minimum using...
by alnaseh
Mon Aug 12, 2019 6:48 am
Forum: General discussion
Topic: Fastest real time face-detection on the RaspberryPi-4??
Replies: 8
Views: 7338

Re: Fastest real time face-detection on the RaspberryPi-4??

From the code, it seems it is opencv api to detect the face
by alnaseh
Sun Aug 04, 2019 4:23 pm
Forum: Java
Topic: java is not supported any more on Pi0 with OS buster
Replies: 13
Views: 16071

Re: java is not supported any more on Pi0 with OS buster

problem is solved. OpenJDK 11 is available for Pi0 armv6 from zulu: https://www.azul.com/downloads/zulu-embedded/ it works out of the box. i need to test its performance against oracle jdk8, but initially it works. i tried as well adoptopenjdk without success. in addition, bell-sw.com has also a rel...

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