Raspberry Pi Forums

dividuum

...so not installation is required. All dependencies can be install with apt. That is a contradiction in terms. Agreed. What I meant with the first part is: You can place the single binary anywhere you want. It doesn't require a specific location within the file system and does not require other fi...

dividuum

Once in a while, I find a cool application that is not in Raspbian's repositories, but compiles and runs well on the Pi. Now I'd like to start a collection of these, since it seems like a lot of new beginners would be interested in these too. I built info-beamer pi . It's a tool to create visual co...

dividuum

6by9 wrote: ↑
Wed May 13, 2020 4:06 pm
vc4-kms-v3d

In contrast to the fake-kms I guess? Is that not going to get any attention going forward?

dividuum

Any update on this issue? I didn't notice any commit comment that looked related, but I might have missed them.

dividuum

Some backstory, I’m using a Pi in a device that closes off access to the Pi itself. In case something goes wrong and I want to “reset” the SD card image, I can’t remove the card to re-image it. My OS has a similar optional feature: Holding a configurable GPIO button results in the data partition be...

dividuum

Would it be then that if I do a three try approach to mount this might solve the issue? I guess that would work if that's indeed the issue here. My memory is a bit fuzzy as that has been year ago and I didn't touch that part since then, so it might also be someting completely different root cause.

dividuum

Seeing as this is a random issue what debug information should be recorded that would be useful? The initramfs is able to detect and recover from this issue and the system boots normally with just an error message. I've observed that it sometimes takes a short moment before /dev/mmcblk0p1 is availa...

dividuum

M1dn1ghtN1nj4 wrote: ↑
Mon Apr 20, 2020 5:49 pm
Maybe a dumb question, but when flashing the bootloader, is it persistent? I can swap sd cards, reinstall Raspian/OctoPrint etc, and the bootloader will stay updated? Updated on an eeprom similar to a BIOS?

Exactly.

dividuum

Thanks timg236 for confirming and giving some extra details.

dividuum

[...] the recovery.bin approach is safe in the event of power failure. I've read that in the documentation (section SELF_UPDATE) already. I guess the reason is that if the EEPROM update is done by recovery.bin, one of two outcomes can happen: Pi finds and loads recovery.bin, which then flashes piee...

dividuum

Yet another new feature/change that seems to have only be publicised by accident :-( PeterO Agreed. It would be great to have some centralized feed of those awesome improvements that constantly pop up in firmware/eeprom/Linux commits as well as the forum. The rest of the eeprom improvements made al...

dividuum

Diagnostics screen should tell you.

Wow. Totally missed that. Here's how it looks like in case anyone hasn't seen it before:

(I tried documenting the values here)

dividuum

I would like to create some type of server that I can access all the video loopers attached to the back of our TVs in each of our locations. I would like to be able to change out videos from this server and manage the videos from one location. Has anyone done something like this and might be able t...

dividuum

@dividuum, did you manage to get HEVC into GL textures? So far I didn't. I tried it, but I wasn't successful thus far. Honestly, I'm not sure what the problem was. I figured that the result wouldn't be too useful anyway in my case: The higher resolution, which is one of the reason to use HEVC, woul...

dividuum

Currently I did it using MMAL, the screen data is obtained using the glReadPixels. It is highly inefficient, so here is the question - are there any way to feed screen content to MMAL directly without using glReadPixels? Some ideas, but I guess all are still too slow for any usable frame rate: You ...

dividuum

I looked deeper and have found difference between these Pi`s - otp boot parameter is different: I'm not sure if the OTP settings have any effect on the boot process. The Pi4 uses the eeprom for those settings. Have a look at the output of: vcgencmd bootloader_config See also https://www.raspberrypi...

dividuum

The previous closed source driver from the Pi3 and before is no longer usable on the Pi4. OpenGL is now based on Mesa3D and DRM. Both keywords should result in previous discussion about this. Getting a GL context is unfortunately a lot more complex than before. A somewhat complete demo of how GL is ...

dividuum

My approach with OMX has been to defer any work by pushing all required information retrieved by the callback into a (thread-safe) queue and handling that outside of the OMX callbacks context.

dividuum

somebody? dividuum? Sorry, I seem to have missed the topic notifications. The debug view isn't included in the default build of info-beamer and even then its output is quite confusing and not very actionable. As long as there's no proper way to force synchronization, I fear the randomness is all th...

dividuum

My personal software wishlist: * Not sure if Full KMS is the goal eventually, but right now using KMS instead of dispmanx has massive downsides: It's less flexible with rotating layers (0/180 degree only), the number of layers is limited and changing layer properties is slower so it's not possible t...

dividuum

yeah, if you have a chance to do it (no hurry) i will considering buying your app :) No need to make this a prerequisite or wait: If you want to test the software and see if the syncing works for your use case, you can use the "private" version for free. It's feature-identical to the paid version, ...

dividuum

relaxpi4 wrote: ↑
Sun Jan 26, 2020 2:11 pm
[...] and that delay will stay constant for a longer period of time (say 1-2 hours)

I did not do any long term tests to see if there's any drift.

dividuum

And what about lower resolution, like 2560x720? Mis-sync is also 8ms max? Didn't try that. And how can you measure the delay? I wrote debug output indicating the state of each screen including a sequentially incremented frame number, whether it's drmModePageFlip'ed already and when the callback con...

dividuum

My software/service info-beamer can do that. You can decode a single 3840x1080 H265 video and place it on both displays. You can run the info-beamer software yourself on Raspbian , but that's a bit of work to get right. The far easier solution is the software as a service solution. If you have a spa...

dividuum

scruss wrote: ↑
Thu Jan 16, 2020 8:59 pm
I think Barrie's looking for a bit more than that: the custom interaction and the no-corruption on power down seem to be important features.

Agreed. Let me rephrase: Digital signage with some nice bonus features

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