[UrushibaraRuka]

I'm really not sure what to suggest as I don't have a fix. If this is a kernel issue with rtl8168g then you'll need to take it up with the kernel maintainers, providing them with debug logs etc. (I've not seen any logs to give any clue what error it is you are actually having) - it's not really something I can help with as I'm just the middle man. Alternatively - and I know you don't want to do this - my solution would be to drop a cheap Intel desktop PCIe NIC into the machine and hopefully that solves the problem (if not, then the Realtek driver isn't the problem). if you don't want to open up your machine then you could even use a USB-to-Ethernet NIC (a UBS2 device should get about 350Mbps, more with USB3 - either should be adequate for video playback).

@Milhouse It's not that I don't want to open my kodi machine, I'll keep the PCIe NIC in mind but I'd really like to get this issue on the ground because I found something very, very weird and I have no explanation at all.

iperf output (on build #0122):

Shiro:~ # iperf -c 192.168.178.27 -t 10 -i 1
Connecting to host 192.168.178.27, port 5201
[  5] local 192.168.178.21 port 57644 connected to 192.168.178.27 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec   114 MBytes   955 Mbits/sec    0    220 KBytes
[  5]   1.00-2.00   sec   113 MBytes   952 Mbits/sec    0    220 KBytes
[  5]   2.00-3.00   sec   113 MBytes   950 Mbits/sec    0    220 KBytes
[  5]   3.00-4.00   sec   113 MBytes   949 Mbits/sec    0    220 KBytes
[  5]   4.00-5.00   sec   113 MBytes   947 Mbits/sec    0    220 KBytes
[  5]   5.00-6.00   sec   113 MBytes   951 Mbits/sec    0    220 KBytes
[  5]   6.00-7.00   sec   113 MBytes   946 Mbits/sec    1    202 KBytes
[  5]   7.00-8.00   sec   113 MBytes   951 Mbits/sec    0    215 KBytes
[  5]   8.00-9.00   sec   113 MBytes   950 Mbits/sec    0    215 KBytes
[  5]   9.00-10.00  sec   113 MBytes   947 Mbits/sec    0    215 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  1.11 GBytes   950 Mbits/sec    1             sender
[  5]   0.00-10.00  sec  1.11 GBytes   949 Mbits/sec                  receiver

iperf Done.

time curl for build #0122 (on build #0122):

Shiro:~ # time curl -L http://milhouse.libreelec.tv/builds/mast...382f49.tar -o /dev/null
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  234M  100  234M    0     0  18.2M      0  0:00:12  0:00:12 --:--:-- 18.4M
real    0m 12.84s
user    0m 1.79s
sys     0m 3.97s

same build #0122 download within kodi itself (on build #0122):


So...what the hell is going on here?!? I really don't understand how that's even possible.
The same speed issue happens with youtube, amazon and so on. It's pretty visible when I look at the speed graph in my router.
Also transfered 1 episode of "Lost Girl" with a filesize of around 2gig at full speed, so SMB or LAN in general is fine, as is the SSD and the download in the console.
So why the hell is everything inside kodi itself so slow?
I know there's a setting to limit the bandwith but that's set to 0 or unlimited.
I'm really baffled right now.

Is there any file where the bandwith limit setting is stored? Maybe, even though I installed it fresh several times, this file/setting persists?
I don't know, grabbing straws here.

And something on the RTL8111 issue I was talking about with how the guy fixed it in his case (blacklisted the r8619, compiled the r8168 and installed that one)
https://unixblogger.com/how-to-get-your-...ted-guide/
But seeing the results in the console I doubt that's the problem.