Disabling PRIME rendering does fix the issue -independent of the setting of "adjust refresh rate"
In my case it did not help (LE 11 Nightly 20210828), in advance after disabling PRIME rendering and reenabling the audio stopped working - from the Audio output devices all vc4-hdmi devices disappeared and it was necessary to reboot LE to get them back (restarting Kodi did not help).
The same issue in LE 11 Nightly 20210828.
How much do the 4B's usually cost for you guys?
Here the best possible offer is 55 € / 61 US$ (just RPi 4B/4GB alone).
Unfortunately, enabling "Adjust refresh rate" does not help with subtitle missing on some TV channels as reported here:
Thanks for a quick patch, it looks the issue is already fixed in LE 11Nightly 20210827. Great work! 
Thanks for the comment but as my RPi 4B/1GB is working fine and has no HW issue (except the known USB-C power profile bug), I am afraid there's no reason for RMA (yes it would be nice to replace it with 2GB for free :-)). Nevertheless, it's a great piece of HW with many use cases, even with 1GB RAM.
BTW. /proc/cpuinfo may return a quite different responses - it depends on OS / kernel versions and it's always a question what's the truth...
For instance - I have RPi 4B/1GB and RPi 4B/2GB models, both bought from the trusted distributor and I believe they are original, the difference should be just RAM size:
RPi 4B/1GB, Linux LibreELEC 5.10.46 #1 SMP Thu Jul 8 21:09:40 CEST 2021 armv7l GNU/Linux:
cat /proc/cpuinfo
processor : 0
model name : ARMv7 Processor rev 3 (v7l)
BogoMIPS : 270.25
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xd08
CPU revision : 3
processor : 1
model name : ARMv7 Processor rev 3 (v7l)
BogoMIPS : 270.25
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xd08
CPU revision : 3
processor : 2
model name : ARMv7 Processor rev 3 (v7l)
BogoMIPS : 270.25
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xd08
CPU revision : 3
processor : 3
model name : ARMv7 Processor rev 3 (v7l)
BogoMIPS : 270.25
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xd08
CPU revision : 3
Hardware : BCM2711
Revision : a03111
Serial : 10000000674*****
Model : Raspberry Pi 4 Model B Rev 1.1
RPi 4B/2GB, Linux LE 5.10.52 #1 SMP Tue Aug 24 10:48:20 CEST 2021 aarch64 GNU/Linux:
cat /proc/cpuinfo
processor : 0
BogoMIPS : 108.50
Features : fp asimd evtstrm crc32 cpuid
CPU implementer : 0x41
CPU architecture: 8
CPU variant : 0x0
CPU part : 0xd08
CPU revision : 3
processor : 1
BogoMIPS : 108.50
Features : fp asimd evtstrm crc32 cpuid
CPU implementer : 0x41
CPU architecture: 8
CPU variant : 0x0
CPU part : 0xd08
CPU revision : 3
processor : 2
BogoMIPS : 108.50
Features : fp asimd evtstrm crc32 cpuid
CPU implementer : 0x41
CPU architecture: 8
CPU variant : 0x0
CPU part : 0xd08
CPU revision : 3
processor : 3
BogoMIPS : 108.50
Features : fp asimd evtstrm crc32 cpuid
CPU implementer : 0x41
CPU architecture: 8
CPU variant : 0x0
CPU part : 0xd08
CPU revision : 3
Hardware : BCM2835
Revision : b03111
Serial : 10000000894*****
Model : Raspberry Pi 4 Model B Rev 1.1
The issue is still the same with LE 11 Nightly 20210824.
This is the video recording which can easily reproduce the issue:
Raspberry Pi 4 once again, just as it’s predecessors, delivers 1.2A max to all USB connectors.
Thanks for the remark, this is an information which I could not find anywhere. Based on practical experiences with RPi 4B, perhaps these limits are more strict than on many other hosts with USB 2.0 / USB 3.0 ports as my old 2,5" HDD with USB/SATA adapter, working on another hosts, did not work on any USB port of RPi 4B (I suppose there's a current peak at HDD startup - a homemade fork USB cable, with reconnected 5 V to power supply, did fix that).
I think it was a bug in older LE releases, related with display resolutions announced by TV. It should be fixed in latest LE builds.
Please note RPi 4B has a low power limit on USB ports so even though the power supply (connected to RPi) is strong enough, the external HDD (powered by USB port only) might not work. Use the USB hub with external power supply or a fork USB cable (allowing to connect an external power supply).
For just LE the 8GB version of RPi 4B is currently a bit overkill (in future who knows). Instead of set I would consider buying better components. My preference would be:
- RPi 4B / 4 GB
- Argon One v2 case which is designed for a great cooling, has a multifunction power button and is prepared for using IR remote control
- Instead of MicroSD card some reliable USB flash key or better - SSD drive with USB/SATA adapter
- A good power supply (15W = 5V /3A)
- A good quality MicroHDMI/HDMI cable
Where is LE getting the information to use that as the default?
It comes from the IR receiver's kernel driver which also installs a default keytable as described here: https://wiki.libreelec.tv/configuration/…s#configuration
Make some changes in your custom keymap file, run ir-keytable -a /storage/.config/rc_maps.cfg -s rc0 and check with ir-keytable -r or test it with irw.
It's not obvious why do you think so.
Check the current mapping with ir-keytable -r
If it's not what you expect, check the path to keymap file (path-to-new-keymap in /storage/.config/rc_maps.cfg file should be /storage/.config/rc_keymaps/yourfilename ) and the keymap file format (for editing use nano from LE command console and not Windows editors except Notepad with Word Wrap disabled).
strange we haven't merged yet anything that should stop them
but there are no addons available yet for LE11 (intentionally) maybe there are some problems
I did not have time to analyze deeply but the kernel log complained about writing error to i2c related to DVB-T stick (even after unplug / plug and even after reboot).
Edit - with LE 11 Nightly 20210819 it works again but kernel log is quickly filling with: rpivid feb10000.codec: PPS changed (seen in past, on LE 10 Nightly 20210808 it was rare)
Try to run ir-keytable -a /storage/.config/rc_maps.cfg -s rc0
The LE11 builds are not really usable yet.
Yeah I can confirm that as I have already tried LE 11 Nightly and my DVB-T USB stick stopped working so I had to revert back.
OK, thanks for your reply. I'll give it a try when I find some free time.
Edit: After upgrade to LE 11 Nightly 20210819 the sensor works again with the old script.
