Just in the last few months I’ve noticed it. Thought it was an anomaly at first, but it’s become pretty consistent whenever I watch a 4K movie now. The buffering is frequent enough that it makes movies unwatchable. Lower bitrate tv shows are okay though. I’m not sure if the onset lines up with a specific version update or not. I guess if it was software, you’d have more complaints by now…
If I set the interface at 100mbps, I get full 100 TX/RX which is the weirdest part.
I have added this in my advancedsettings.xml config file, eventually it helps you too:
<cache>
<buffermode>1</buffermode>
<memorysize>94371840</memorysize>
<readfactor>4.0</readfactor>
</cache>
Works on Vero4k2 and Vero4k2+
Unfortunately I have already tried a few different permutations of the memsize and readfactor all the way up to 10.0 with no measurable change.
I recall these settings did help greatly when I was tuning a RPi3 a few years back on 100mbps so it’s a solid tip, thanks
Sam, I know it’s well and truly out of warranty and you seem certain it’s not from the known-bad batch. Am I right to assume it can’t be corrected in software and I should i just buy a new one?
That would at least make you able to play 99% of all movies currently out there, maybe better to do that then the broken Gigabit.
@frozenpea I can’t make or influence the decision of an out-of-warranty exchange, but what do you think of the idea of bypassing the built-in network interface with a cheap USB gigabit adapter? See also Gigabit Ethernet Adapter for Vero 4K - #5 by JimKnopf (I bought it in 2019). But not all adapters will work, so you have do some research here in the forum.
Addition: Just tested it again after a long time directly connected to a Vero4k+ without an USB-hub and a Windows 10 PC as the iperf3 counterpart.
This adapter is good for 280 Mbit/sec sending and 340 Mbit/sec receiving data.
# dmesg|grep -i ax88
[ 280.883259] usb 1-1: Product: AX88179
[ 281.301229] ax88179_178a 1-1:1.0 eth1: register 'ax88179_178a' at usb-xhci-hcd.0.auto-1, ASIX
AX88179 USB 3.0 Gigabit Ethernet, 00:50:b6:28:ea:e4
[ 281.301761] usbcore: registered new interface driver ax88179_178a
You can send it back to us if you’d like and I can check it here - but it is not an affected device.
Cheers
Sam
I purchased a USB adapter (TP-Link UE306) yesterday. Maybe this is a compromise i can live with. It cost half of what it would cost to ship the unit back to the UK. I shall watch some movies and see how I go. Thanks for the advice everyone. Hopefully you’ve heard the last from me 
osmc@osmc:~$ iperf3 -c nas
Connecting to host nas, port 5201
[ 5] local 192.168.1.117 port 38750 connected to 192.168.1.27 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 33.2 MBytes 278 Mbits/sec 0 74.9 KBytes
[ 5] 1.00-2.00 sec 32.8 MBytes 276 Mbits/sec 0 74.9 KBytes
[ 5] 2.00-3.00 sec 33.0 MBytes 276 Mbits/sec 0 74.9 KBytes
[ 5] 3.00-4.00 sec 32.7 MBytes 274 Mbits/sec 0 74.9 KBytes
[ 5] 4.00-5.00 sec 32.8 MBytes 275 Mbits/sec 0 74.9 KBytes
[ 5] 5.00-6.00 sec 33.0 MBytes 277 Mbits/sec 0 74.9 KBytes
[ 5] 6.00-7.00 sec 32.9 MBytes 276 Mbits/sec 0 74.9 KBytes
[ 5] 7.00-8.00 sec 32.9 MBytes 276 Mbits/sec 0 74.9 KBytes
[ 5] 8.00-9.03 sec 33.5 MBytes 274 Mbits/sec 0 74.9 KBytes
[ 5] 9.03-10.00 sec 32.4 MBytes 279 Mbits/sec 0 124 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 329 MBytes 276 Mbits/sec 0 sender
[ 5] 0.00-10.00 sec 329 MBytes 276 Mbits/sec receiver
iperf Done.
osmc@osmc:~$ iperf3 -c nas -R
Connecting to host nas, port 5201
Reverse mode, remote host nas is sending
[ 5] local 192.168.1.117 port 38754 connected to 192.168.1.27 port 5201
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 20.9 MBytes 176 Mbits/sec
[ 5] 1.00-2.00 sec 21.0 MBytes 176 Mbits/sec
[ 5] 2.00-3.00 sec 21.1 MBytes 177 Mbits/sec
[ 5] 3.00-4.00 sec 20.8 MBytes 174 Mbits/sec
[ 5] 4.00-5.00 sec 21.3 MBytes 178 Mbits/sec
[ 5] 5.00-6.00 sec 20.8 MBytes 174 Mbits/sec
[ 5] 6.00-7.00 sec 20.7 MBytes 174 Mbits/sec
[ 5] 7.00-8.00 sec 20.7 MBytes 173 Mbits/sec
[ 5] 8.00-9.00 sec 17.6 MBytes 148 Mbits/sec
[ 5] 9.00-10.00 sec 10.6 MBytes 88.7 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 196 MBytes 164 Mbits/sec 5903 sender
[ 5] 0.00-10.00 sec 195 MBytes 164 Mbits/sec receiver
iperf Done.
So far so good.
Whereas these values would frequently descend down to 0MB/near-0% in between buffering pauses previously, it now stays steady and 100%. Videos seem to start quicker too, although that could be my imagination…
@frozenpea How do you get Kodi to display those metrics? Doesn’t look like debug logging output I get
