Recalbox's Netplay online list have very little users online, not more than 10, sometimes up to 15 games and that's all.
I wonder why? Considering Recalbox is very well-known system all around the world, has thousands of users in all the continents.. I think manual/static IP, port forwarding and so on, seem hard for users to achieve.. Anyway, I wrote u step-by-step guide on how to set a static IP, I hope it'll be useful:

For everyone who needs static IP address (for Port Forwarding/Netplay):

Recalbox should be on and connected to the same modem/network as your PC. Tested on Windows 10:
Go to Command Prompt (On Keyboard press Win Key+R, type: cmd and enter)
Type the following commands:

ping recalbox
(You'll get your recalbox's IP address) In this case, 192.168.1.16 as example:

then type:

ssh root@192.168.1.16 (enter)
Answer 'yes' to all the questions, it will ask for your recalbox's root password, type recalboxroot as password.

Type:
connmanctl services and note what is returned, for example:
*AO Wired ethernet_b827eb6462be_cable

Then type:
cd (enter)
and then type:
nano custom.sh (enter)

Type the following text in nano editor:

#!/bin/bash
/usr/bin/connmanctl config ethernet_b827eb6462be_cable --ipv4 manual 192.168.1.16 255.255.255.0 192.168.1.1
mount -o remount,rw /
echo "nameserver 208.67.222.222" >> /etc/resolv.conf
echo "nameserver 208.67.220.220" >> /etc/resolv.conf

Please note that in our example custom.sh file:
192.168.1.16: Your recalbox's IP address that'll be static.
255.255.255.0: Your Subnet Mask
192.168.1.1: Your modem/router IP address.

Replace ethernet_*** by the value you've got previously and the IP address you want to give. You might wish to replace the DNS server IPs of the OpenDNS project, with the DNS servers (if any) provided by your own ISP.

Then quit from nano text editor by Ctrl X, answer the saving question by typing Y and then finally Enter.

After quiting nano and back to terminal shell, type the command:
chmod +x custom.sh
to make it executable, then:
reboot
to restart your Recalbox.

Finally, go to your modem/router Port Forwarding page, forward the port numbered 55435 (both TCP/UDP) to your Recalbox's IP address.
Let me know in case if you have any problem. Successfully tested on Recalbox 6.0.

For everyone who needs static IP address (for Port Forwarding/Netplay):
Recalbox should be on and connected to the same modem/network as your PC. Tested on Windows 10:
Go to Command Prompt (On Keyboard press Win Key+R, type: cmd and enter)
Type the following commands:

ping recalbox
(You'll get your recalbox's IP address) In this case, 192.168.1.16 as example:

then type:

ssh root@192.168.1.16 (enter)
Answer 'yes' to all the questions, it will ask for your recalbox's root password, type recalboxroot as password.

Type:
connmanctl services and note what is returned, for example:
*AO Wired ethernet_b827eb6462be_cable

Then type:
cd (enter)
and then type:
nano custom.sh (enter)

Type the following text in nano editor:

#!/bin/bash
/usr/bin/connmanctl config ethernet_b827eb6462be_cable --ipv4 manual 192.168.1.16 255.255.255.0 192.168.1.1
mount -o remount,rw /
echo "nameserver 208.67.222.222" >> /etc/resolv.conf
echo "nameserver 208.67.220.220" >> /etc/resolv.conf

Please note that in our example custom.sh file:
192.168.1.16: Your recalbox's IP address that'll be static.
255.255.255.0: Your Subnet Mask
192.168.1.1: Your modem/router IP address.

Replace ethernet_*** by the value you've got previously and the IP address you want to give. You might wish to replace the DNS server IPs of the OpenDNS project, with the DNS servers (if any) provided by your own ISP.

Then quit from nano text editor by Ctrl X, answer the saving question by typing Y and then finally Enter.

After quiting nano and back to terminal shell, type the command:
chmod +x custom.sh
to make it executable, then:
reboot
to restart your Recalbox.

Finally, go to your modem/router Port Forwarding page, forward the port numbered 55435 (both TCP/UDP) to your Recalbox's IP address.

Successfully tested on Recalbox 6.0.
Let me know in case if you have any problem.

A very elegant, beautiful and classic theme! I love it! I think it's not fully compatible with Recalbox 6.0. Is there any updated version of this beauty?

Many thanks!

It's very clean, elegant, retro and vintage! Definitely a must-have classic! <3

I think it's not fully compatible with Recalbox 6.0. Is there any updated version of this beauty?

Many thanks!

While Raspberry Pi 4 having a huge GPU boost (Broadcom VideoCore VI), it will easily (and almost perfectly) emulate PS1, Dreamcast, N64, and even perhaps PS2.

It's really a disturbing problem, having shaders not saved, setting them again and again on each game play. :/

Congrats and thanks SO MUCH for such a great effort! Well appreciated and respected!

Just one thing; not working shaders are really a trouble, as "xHardcore" said here.. It's quite boring to set a shader from the beginning, each time on a game play.. Please have it fixed someday soon! :/

Many thanks!

@substring said in 18.03.16 screen resolution problem.:

@tekkenism ~/logs/recalbox.log, you can also see it from the webmanager

Perhaps I'll sound silly but I disabled Webmanager and that Media Player, for..ermm...saving a bit more RAM. Eh?
Anyway, I'll nano that log file from time to time. Recalbox is a stable thing, I really want to -contrinute- it to be rock-solid!

@substring said in 18.03.16 screen resolution problem.:

The log shows

[       44.50] configgen/videoMode.py(isSupported:68): The resolution for 'CEA 4 HDMI' is not supported by your monitor
[       44.53] configgen/videoMode.py(autoMode:115): auto mode -> CEA 4 HDMI not supported, fallback to default

@barto28 has the very same problem, but switching to auto mostly resolved the problem but for N64.

I just wonder where's the path of that log file please? I'd like to see what's going on, on my Recalbox. Thanks.

@idarius Thank you so much!