p.s. thread title changed because you have done clean install from SD card and are not technically updating from CE; which is something I have no interest in trying to support with users as too much has changed and too much stuff breaks.
Thread title was my baby, but it's OK 
. I've separated those two posts from another thread.
Read https://wiki.libreelec.tv/configuration/ir-remotes.
If no success...
Should this have worked if it was using other device tags?
I don't know. My idea was to remove <one> and <three> from all devices at Lircmap.xml.
Different approach: Remove remote.xml, and just use this Lircmap.xml:
<?xml version="1.0" encoding="UTF-8"?>
<lircmap>
<remote device="devinput">
<one>seek(-15)</one>
<three>seek(15)</three>
</remote>
</lircmap>FATAL : [script.module.inputstreamhelper] Widevine or Chrome OS recovery.json is missing. Reinstall is required.
Reinstall the InputStream Helper add-on.
Now to scan EVERYTHING, anyone got a good tutorial?
What does "everything" mean? Remember, not all files can hold music tags. That's what MB Picard adds.
WARNING : [script.module.inputstreamhelper] Delete file '/storage/.kodi/cdm/libwidevinecdm.so'.
WARNING : [script.module.inputstreamhelper] Hardlink file '/storage/.kodi/userdata/addon_data/script.module.inputstreamhelper/backup/15236.66.0/libwidevinecdm.so' to '/storage/.kodi/cdm/libwidevinecdm.so'.
FATAL : [script.module.inputstreamhelper] Widevine or Chrome OS recovery.json is missing. Reinstall is required.
Remove that link: /storage/.kodi/userdata/addon_data/script.module.inputstreamhelper/backup/15236.66.0/libwidevinecdm.so
As you can see at /usr/share/kodi/system/Lircmap.xml, there is more than just one device tag.
I suggest to copy that complete Lircmap.xml into /storage/.kodi/userdata.
Then edit content inside different device tags, and check the results. Maybe device tags other than "devinput" also have effects.
Try to update with my /storage/.kodi/cdm/config.json (see attachment, remove the .txt ending). I'm using RPi3B+.
OK. Remove your Lircmap.xml. This is an overwrite / customization of the default version at system folder.
Could be an error on our server configuration. Admin is informed - stay tuned.
Deactivate "CEC Adapter" on input settings.
Widevine comes from ChromeOS download, hosted by Google. That failed by checksum. Try to find an extracted Widevine library.
DSD player showcase: Click!
Use
<audiodelayrange>VALUE_IN_SECS</audiodelayrange>for audio delay or
<latency>
<delay>VALUE_IN_MSECS</delay>
</latency>for video delay.
If I connect via librespot it gets choppy.
So it might has something to do with the plug-in.
That's possible. You probably have an outdated version of librespot, because the add-on repo is different for newer Kodi / LE.
You can't use librespot from a newer repo, because it has different software dependencies (Python version).
Compiling your own librespot needs programming skills.
OK,where do I look for it, in LE11 or Beebox UEFI?
LE 11. Create an advancedsettings.xml file: Click!
Is there any hope that the problem with the Generic HDMI-DP Linux driver will be fixed?
Nobody here is working on it. Better ask at the Kodi forum, because this affects many players.
