Posts by chewitt

  • Best LE 13 Nightly for Intel N150 (Alder Lake-N)

    I'm not aware of any general issues with freezing/stalls on N100/N150 devices. There are less than a handful of reports with that kind of issue and most were triaged to some form of PEBKAC, or AI analysis of kernel crashes points to buggy wifi drivers (which newer kernels in nightlies might resolve) or users failed to provide meaningful information to investigate.

    TL/DR; The latest nightly would always be the staff recommendation. The only known issue is a long-running one with [email protected] playback and pass-through audio on HDMI connections, but that has a known workaround (reducing display bit-depth).

    If you then see issues, report them.

  • LE13 Testing for RK3288, RK3328, RK3399, RK3566, RK3568, RK3576, RK3588

    Test share images are updated with Linux 6.19-rc6 and a notable fix to gracefully handle uninitialised values during HEVC decoding which helps with 4K media files that spammed the system log with errors. I'm now able to play all the HEVC media in my test-file collection which includes a number of known-bad files. Playback of those sometimes takes 10-15 seconds to start, depending on the underlying kind of broken, but even those play which is great. That fix (the result of AI analysis of kernel splats) also pointed fingers to some related code that can be improved to not allow the uninitialised values in the first-place, so we should see some additional fixes on the mailing-list in the next week.

    At this point the only things I feel are missing from RK3588 are HDR and hardware deinterlacing. The former will eventually happen through work Collabora are doing. Nobody is handling the latter though.

    I'm back to buffer size AI guesswork and nagging Jonas to review old patches for older hardware so we can get closer to a unified kernel source for aarch64 boards.

  • LE13 Testing for RK3288, RK3328, RK3399, RK3566, RK3568, RK3576, RK3588

    Things work better on LE due to the OS being overall lighter and because Kodi setup with adjust-refresh and whitelists etc. requires less compute resources during playback than a desktop app under wayland that's forced to resample audio and video to run at the desktop rate of 1080@60Hz or 4K@60Hz.

    The buffer size issue is the main thing to focus on for VDPU346. The VP9 patches seem to work well and I'm coaching Abhi Sarma on kernel etiquette so hopefully a v1 series can be sent for review soon.

    The minor tearing/glitches that can be seen when the Kodi OSD is active are the result of refactoring in the ffmpeg patches (dealing with ffmpeg developer feedback/requirements) and additional work in Kodi is needed to get back to the previous state where there were no artefacts. More patch series need to be merged down, then some effort can go into investigating that.

  • LE13 Testing for RK3288, RK3328, RK3399, RK3566, RK3568, RK3576, RK3588

    I've read the feedback. I'm still experimenting with AI tools to see if they can bridge the gap in my rather lightweight coding skills or we have to resort to nagging Collabora folks to take over (or cap the current driver at 1080p to get an initial merge).

    HDR works, 8-bit only? (HDR is better when 10-bit but it's not mandatory) as RK3566/68 use the older Rockchip HDMI IP which has more colour support upstream. The newer one used with RK3588 etc. is still missing some infoframe handling IIRC.

    btw, Jonas believes https://github.com/torvalds/linux…2fdfc001d044bee might have resolved the "wiotlb buffer is full" IOMMU issue that requires RAM to be capped under 4GB. I'm going to remove the cap on my boards and see if I still get a load of weird errors. Please do the same on your LE images.

  • How to create a playlist?

    Read: https://kodi.wiki/view/Internet_video_and_audio_streams

    Create .strm files for each Soundcloud URL that you want to use as media. Kodi treats these like a media file with no metadata.

    Create .nfo files for each .strm file. This is required. It also provides a way to add metadata, e.g. pretty names, if wanted.

    Scrape the .nfo files to the Library.

    Add Library items to a playlist.

    Do something with the playlist, like script it being started 20 seconds after Kodi starts (how you do that is .. Google'able).

    Plan B .. get a Raspberry Pi and use one of the many good niche distros or RPiOS installable apps/containers designed for "signage" use-cases, as that appears to be the end goal and something Kodi is not really designed for.

  • LE13 Testing for RK3288, RK3328, RK3399, RK3566, RK3568, RK3576, RK3588

    axel I've spoken to Radxa about the AIC8800 wireless chip a couple of months ago as it's also fitted to one the boards I've been using to test. Radxa have no plans to upstream the driver as this would require a large effort, i.e. complete rewrite as the current quality of driver code would never be accepted into the kernel, and after years of working to rid our codebase of the maintenance burden of downstream (mostly Realtek) drivers we have no desire to add technical dept in the form of another vendor driver that has no plan to be upstreamed. I've shared our surprise/annoyance and position, and have strongly suggested they stick to using Broadcom, Qualcomm, Realtek (now upstream) chips in future iterations of current boards and future board designs so distros can avoid the need for crap drivers. I'm not sure LibreELEC's opinion will carry much commercial weight with them, but from our side, there's no action to be taken.

  • RPi5 kernel development image

    If you are proficient in Docker then it should be trivial for you to use the Docker files in tools/Docker that result in a pre-configured and working build environment for creating an LE image. Once you have a working LE image, add a package for the xone driver and build it into the image and push the changes to GitHub/Gitlab etc. so others can see the package.mk recipe.

    It is not impossible to build a driver add-on, but the general challenge is that kernel modules must have the same 'version magic' as the running kernel, and in LE the add-on repo version is loosely aligned to Kodi API version and not kernel version. This means for each add-on repo version users will have a range of different kernel versions in use. The kernel's media-tree used to support 'media build' which provides a method for compiling and running 'DVB' kernel modules from an older codebase to run on a newer kernel version. LE has previously used this to package a bunch of DVB drivers for e.g. TBS cards as an add-on. We have since stopped doing this because it's a pain in the rear to maintain, but the prior art still exists in the buildsystem and you could use the same approach to create an add-on for the Xone driver.

  • LE13 Testing for RK3288, RK3328, RK3399, RK3566, RK3568, RK3576, RK3588

    Quote from axel

    Zero 3W, and it booted fine however, no wifi card appears to be detected, nor bluetooth

    I can see that device-tree defines the module, but I can't see anything in documentation that states which Broadcom chipset is being used. It's probably something new(er) that we don't have firmware for, but as you didn't share the system log .. that's only a blind guess and could be wrong. In short .. no idea /shrug

  • [x86-64] How to change resolution manually?

    SSH in to the box, make /flash writeable with mount -o remount,rw /flash then append video=HDMI-A-1:1360x720M@60D to kernel boot params in syslinux.cfg in the boot partition and it will force the initial kernel DRM state for the HDMI-A-1 connector to use that mode. For this to work the kernel needs to detect/see that mode via EDID data on the same connector. Adjust the connector name to match whatever HDMI port is being used (if there is more than one). Adjust the resolution to one that is listed if not, e.g. if the TV supports 1080p then use 1920x1080 not 1360x720. The kernel is probably auto-selecting an initial display mode based on the modes advertised but for some reason the TV doesn't actually like that mode (bad EDID data can be a thing sometimes). The same is seen sometimes with 4K TV's and forcing the initial state to 1080p helps.