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by 7F20
Wed Apr 07, 2021 5:37 pm
Forum: Beginners
Topic: Lidar Choices?
Replies: 2
Views: 583

Lidar Choices?

I'm looking at projects using lidar depth sensors, and I'm confused about the different choices. I saw this one on Adafruit website: https://www.adafruit.com/product/4058#technical-details Would this allow me to couple it with a camera and create a depth point cloud? I want to achieve something simi...
by 7F20
Mon Feb 08, 2021 12:23 am
Forum: Troubleshooting
Topic: Pi 4/400/CM4 with 1366x768 display not working?
Replies: 28
Views: 10102

Re: Pi 4 with 1366x768 display not working?

Thanks for your reply. Sorry about the duplicate post. There is no way for the sync event to be signalled as being in the middle of the two pixels produced per cycle. I'm not sure if understand the behavior of the clock and it's relationship to each aspect of the modeline. Since each individual part...
by 7F20
Sun Feb 07, 2021 3:47 am
Forum: Advanced users
Topic: HDMI output on Pi4
Replies: 1
Views: 246

HDMI output on Pi4

I recently learned that the Pi4 HDMI output generates 2 pixels per clock cycle. On the page explaining this, the information states that the effect of this is that you cannot use any odd values for a custom "hdmi_timings=" line. Running everything at 2 pixels per clock means that the Pi4 c...
by 7F20
Fri Feb 05, 2021 6:28 pm
Forum: Troubleshooting
Topic: Pi 4/400/CM4 with 1366x768 display not working?
Replies: 28
Views: 10102

Re: Pi 4 with 1366x768 display not working?

Would it work if you were, for example, creating an "hdmi_timings=" that contains 2 odd values, so that the line pixel count ends up being even? Like, let's say both the front and the back porches had an odd value; that would make the line total even. Would that be okay, or does that still...
by 7F20
Thu Feb 04, 2021 7:15 pm
Forum: Graphics, sound and multimedia
Topic: VLC audio errors from command line?
Replies: 0
Views: 174

VLC audio errors from command line?

I'm using VLC from the command line. It seems to be playing music, but there is some kind of error messages thrown up here that I don't understand. I'm wondering what they mean if someone knows.
I'm operating it headless for this.

Thanks

Image
by 7F20
Tue Jan 26, 2021 1:01 am
Forum: OpenGLES
Topic: Videocore and OpenGLES3 Pi4
Replies: 22
Views: 4200

Re: Videocore and OpenGLES3 Pi4

There is nothing that comes why it would not build because the GL context RetroArch creates should be using EGL which is what it used to interface with KMS/DRM. Thanks for the extra suggestions. I got another recommendation for EGL from someone, but AFAIK, it hasn't been done yet (I haven't seen an...
by 7F20
Mon Jan 25, 2021 7:31 pm
Forum: OpenGLES
Topic: Videocore and OpenGLES3 Pi4
Replies: 22
Views: 4200

Re: Videocore and OpenGLES3 Pi4

Build RetroArch with the following to support all APIs - OpenGLES and Vulkan ./configure --disable-sdl --enable-sdl2 --disable-oss --disable-al --disable-jack --disable-qt --disable-pulse --enable-opengles --enable-opengles3_1 --disable-opengles3_2 --disable-videocore --enable-kms --enable-egl --en...
by 7F20
Sun Jan 24, 2021 10:06 pm
Forum: OpenGLES
Topic: Videocore and OpenGLES3 Pi4
Replies: 22
Views: 4200

Re: Videocore and OpenGLES3 Pi4

Presumably the --disable videocore option built the program using the standard Linux/Mesa drivers and not use the Broadcom drivers (the RPi4 & RPi400 can't use the Broadcom drivers anyway). And the --enable-OpenGLES3 probably was to choose OpenGLES3 rather than OpenGLES2 or OpenGL3 or whichever...
by 7F20
Sun Jan 24, 2021 7:12 pm
Forum: OpenGLES
Topic: Videocore and OpenGLES3 Pi4
Replies: 22
Views: 4200

Re: Videocore and OpenGLES3 Pi4

thanks for the corrections and thats interesting to know the Xserver needs the OpenGL. The "fake" KMS driver has NOTHING to do with V3D. It's whether the DRM/KMS rendering pipeline (putting image buffers on to displays) is controlled by the firmware ("fake") or Linux kernel (&qu...
by 7F20
Wed Jan 20, 2021 10:37 pm
Forum: OpenGLES
Topic: Videocore and OpenGLES3 Pi4
Replies: 22
Views: 4200

Re: Videocore and OpenGLES3 Pi4

i believe VC4 and VC6 (videocore4 and videocore6) is the name for the whole chip, and all peripherals within it No. See https://en.wikipedia.org/wiki/Raspberry_Pi#Specifications for correct names. PeterO Wait, that was wrong? The wikipedia link you gave lists the GPU for the Pi4B as the "Broad...
by 7F20
Wed Jan 20, 2021 8:33 pm
Forum: OpenGLES
Topic: Videocore and OpenGLES3 Pi4
Replies: 22
Views: 4200

Re: Videocore and OpenGLES3 Pi4

v3d is the peripheral that then handles all opengl layer stuff fkms and kms, are then drivers for the 2d subsystem, and those get used to render the final 2d output over a port like hdmi Thanks for the reply. That makes sense. As I understand it, "disable videocore" disables the VC6 drive...
by 7F20
Wed Jan 20, 2021 6:42 pm
Forum: OpenGLES
Topic: Videocore and OpenGLES3 Pi4
Replies: 22
Views: 4200

Videocore and OpenGLES3 Pi4

I'm a little confused about exactly what Videocore is, and how to configure things while I'm compiling for videocore or GLES3 and how that interacts with FKMS and full KMS. My current understanding of it is like this: -Videocore is the name of the GPU -"Videocore" can be enable or disabled...
by 7F20
Tue Dec 29, 2020 1:01 am
Forum: Troubleshooting
Topic: Re: Pi3B+ Firmware Revision History
Replies: 12
Views: 555

Re: Pi3B+ Firmware Revision History

As long as your display setup is solely from config.txt strings which do NOT include "dtoverlay=vc4-kms-v3d", then it should be limited to the firmware. Thank you very much 6by9; I was starting to get confused, and your explanation cleared a lot of things up for me. AFAIK, "dtoverlay...
by 7F20
Mon Dec 28, 2020 5:21 pm
Forum: Troubleshooting
Topic: Re: Pi3B+ Firmware Revision History
Replies: 12
Views: 555

Re: Pi3B+ Firmware Revision History

"sudo rpi-update <hash>" will download and copy that release (kernel and firmware) to your system. Reboot and test. If you think it's something that is only within the firmware (not the kernel), you can use "sudo SKIP_KERNEL=1 rpi-update <hash>" to only revert the firmware. Than...
by 7F20
Sun Dec 27, 2020 9:46 pm
Forum: Troubleshooting
Topic: Re: Pi3B+ Firmware Revision History
Replies: 12
Views: 555

Re: Pi3B+ Firmware Revision History

Do you mean the FKMS graphics driver when you use "fake"? That is an Arm side driver, which I think has its history in our Linux github repo. However, FKMS does rely on the "firmware" in the GPU to drive everything, and I suspect any issues with VGA/HDMI will be in there. What i...
by 7F20
Sun Dec 27, 2020 9:13 pm
Forum: Troubleshooting
Topic: Re: Pi3B+ Firmware Revision History
Replies: 12
Views: 555

Re: Pi3B+ Firmware Revision History

Well I was going by the classical definition: https://en.wikipedia.org/wiki/Firmware but yes, it depends on what the OP meant by firmware. Judging by github, this may be what the RPF/RPT consider firmware: https://github.com/raspberrypi/firmware though it doesn't fit the classic definition. Thanks ...
by 7F20
Sat Dec 26, 2020 4:43 pm
Forum: Troubleshooting
Topic: Re: Pi3B+ Firmware Revision History
Replies: 12
Views: 555

Pi3B+ Firmware Revision History

Is there a place I can view the revision history of the firmware for the Pi3+? A group of people, including myself, is trying to track down an issue with using hdmi-vga adapters at various resolutions, and we want to make a list of firmware and software combinations that we can get things working on...
by 7F20
Wed Dec 02, 2020 12:30 am
Forum: Gaming
Topic: Pi 4 VR Headset
Replies: 15
Views: 3359

Re: Pi 4 VR Headset

As already noted, there are many technologies inside of a VR headset that are all of great importance to the experience. What you might not realize is that VR has been around for a very long time, and it's only been quite recently that devices have been developed which can be worn for extended perio...
by 7F20
Fri Oct 23, 2020 1:13 am
Forum: Beginners
Topic: Differences Launching Program with "Sudo"
Replies: 15
Views: 782

Re: Differences Launching Program with "Sudo"

That's not the thing about the cloud that concerns me, It's putting my data on a server I have no control over, that doesn't make any guarantees about whether said data is backed up or secure, and that's operated by a company you don't know will still exist tomorrow. Then you assume that as it's in...
by 7F20
Fri Oct 16, 2020 7:38 pm
Forum: Beginners
Topic: Differences Launching Program with "Sudo"
Replies: 15
Views: 782

Re: Differences Launching Program with "Sudo"

thagrol wrote:
Fri Oct 16, 2020 12:01 pm
Try this:

Code: Select all

wc -l /etc/passwd
ls /home

Hmmm. I don't really understand the output. If I look in that file, I see lines with IRC Daemon Bin, and common file names in the directory. Do all of those system files have their own user?
by 7F20
Thu Oct 15, 2020 11:15 pm
Forum: Beginners
Topic: Differences Launching Program with "Sudo"
Replies: 15
Views: 782

Re: Differences Launching Program with "Sudo"

I ALWAYS use sudo to run pip3 or python3 -m pip as that removes the need to install packages twice or get more than one copy if a package is pulled in as a dependency. Ok. If you want the modules available to every user on the system without having to install them multiple times, use sudo. Thanks f...
by 7F20
Thu Oct 15, 2020 9:43 pm
Forum: Beginners
Topic: Differences Launching Program with "Sudo"
Replies: 15
Views: 782

Re: Differences Launching Program with "Sudo"

Thanks for your reply For example "pip" and "pip3" will install Python libraries in different places depending on whether run with sudo or without. This is something that I specifically noticed awhile back. I was installing the program "MPS-youtube," which is sadly aban...
by 7F20
Thu Oct 15, 2020 5:31 pm
Forum: Beginners
Topic: Differences Launching Program with "Sudo"
Replies: 15
Views: 782

Differences Launching Program with "Sudo"

I was wondering why sometimes I get a different result in Raspberry Pi OS when I launch a program with "sudo" than I do when running it "normally." For example, if I launch w3m, it seems to keep a different set of settings, like it's storing the configuration files in a totally d...
by 7F20
Thu Sep 24, 2020 2:29 am
Forum: General discussion
Topic: Help with vc4-fkms-v3d FKSM issue
Replies: 15
Views: 2866

Re: Help with vc4-fkms-v3d FKSM issue

I don't think making a custom EDID will work for you either. You can read through the error codes I got, but it doesn't work; it's either ignoring my EDID, or calling it invalid and then hitting up modedb for a replacement. This is of course assuming that 1) you are trying to drive a display with a ...
by 7F20
Sun Jun 28, 2020 5:57 pm
Forum: Graphics, sound and multimedia
Topic: Playing Midi files from the command line
Replies: 2
Views: 776

Re: Playing Midi files from the command line

Your player needs to send the sysex patches before sending the MIDI file. You can't do it separately. The -e option is for Munt to write the sysex patches to a file. It isn't reading it. Ok. I suppose that I should have realized that because the -w switch writes a wav. I figured out how to do it in...

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