@substring enjoy your holidays! I appreciate the help so far. Thanks

@substring, thanks very much. I was able to write to xinitrc in the /X11/xinit directory after stopping ES.
Now that I am able to start and stop the service freely it's a lot quicker to verify if the changes made to xinitrc actually work. Unless I should be doing a full reboot after making those changes?

So far though, I haven't had any luck. Behaviour is still this same.
I stripped back the xrandr attributes to just output as HDMI now in case there is some issue with outputting to both the netbook and the tv.
Not sure if it's an issue trying to output HD to a 4k tv but I would have just assumed the image would be smaller.

If you have any other suggestions that would be great. If not, I appreciate the help anyway.
Cheers!

I tried following the instructions here
https://github.com/recalbox/recalbox-os/wiki/Change-display-resolution-on-x86---x86_64
but I kept getting "read only system file" message when copying the file to a different directory.

Just to note that I was actually able to see the .xinitrc file in the /recalbox/share/system directory after trying a second time. Not sure what happened first time around, possibly missed something when copying the command initially.

Anyway, I was able to modify the file there and added the following parameter
xrandr --output HDMI-0 --mode 1920x1080 --same-as LVDS-0

Once I rebooted Recalbox the issue still persisted. Not sure what else to do at this point.

Just thinking there. Is the reason that I cannot modify the file is because it is currently in use?

Is there a command I can run to say stop a service that might be using the xinitrc file so I can modify it?

@Substring ok, so I'm unable to actually modify the xinitrc file as it's read only (no surprises there).
I tried following the instructions here
https://github.com/recalbox/recalbox-os/wiki/Change-display-resolution-on-x86---x86_64
but I kept getting "read only system file" message when copying the file to a different directory.

I then modified the file on my local machine but again, when I try to copy the modified file back to the xinitrc directory I get a read only error on the directory.

I tried to chmod the xinitrc directory but that didn't work.
I tried to chmod the file but that also didn't work.
I tried to change user to sudo but sudo isn't a recognised command.
I tried to use su instead but when I enable su with su - I wasn't prompted for a password so su didn't work.

I am logged in as the root user as outlined here so I'm not sure what else I could do to actually modify this file.
https://github.com/recalbox/recalbox-os/wiki/Root-access-on-terminal-(EN)

Any help would be great.

@substring - AWESOME! that worked. Thank you.

I'll come back here once I've modified the .xinitrc conf file and let you know how it went.

Thanks again.

Cheers @substring
Both responses from yourself and @gnubit helped me understand the files that need to be modified and what needs to be included.

In both instances, however, I get stuck at the first hurdle which is displaying the list of connections available. When I run 'xrandr' as root the message I receive is "Can't open displays"

I checked online for a solution for this and in a separate forum, it appears that there is a xorg.conf file that a user modified and was able to resolve his issue.
https://ubuntuforums.org/showthread.php?t=1947733
While it's a separate issue I assumed the configuration would be similar. As such, I tried to find a xorg.conf file but the only thing I could find the X11 directory was a xorg.conf.d directory which contained a file called "99-avoid-joysticks.conf".

I did notice that a list of connections are present in var/log/messages and I considered modifying the conf file in .xinitrc but I'm not sure if I need to include the full name as displayed in the /var/log/messages "HDMI-A-1"

[code]
Jul 22 11:51:03 RECALBOX user.info kernel: [ 10.817368] [drm] Radeon Display Connectors
Jul 22 11:51:03 RECALBOX user.info kernel: [ 10.817372] [drm] Connector 0:
Jul 22 11:51:03 RECALBOX user.info kernel: [ 10.817374] [drm] LVDS-1
Jul 22 11:51:03 RECALBOX user.info kernel: [ 10.817376] [drm] HPD1
Jul 22 11:51:03 RECALBOX user.info kernel: [ 10.817380] [drm] DDC: 0x6430 0x6430 0x6434 0x6434 0x6438 0x6438 0x643c 0x643c
Jul 22 11:51:03 RECALBOX user.info kernel: [ 10.817381] [drm] Encoders:
Jul 22 11:51:03 RECALBOX user.info kernel: [ 10.817383] [drm] LCD1: INTERNAL_UNIPHY
Jul 22 11:51:03 RECALBOX user.info kernel: [ 10.817385] [drm] Connector 1:
Jul 22 11:51:03 RECALBOX user.info kernel: [ 10.817386] [drm] HDMI-A-1
Jul 22 11:51:03 RECALBOX user.info kernel: [ 10.817387] [drm] HPD2
Jul 22 11:51:03 RECALBOX user.info kernel: [ 10.817391] [drm] DDC: 0x6440 0x6440 0x6444 0x6444 0x6448 0x6448 0x644c 0x644c
Jul 22 11:51:03 RECALBOX user.info kernel: [ 10.817392] [drm] Encoders:
Jul 22 11:51:03 RECALBOX user.info kernel: [ 10.817393] [drm] DFP1: INTERNAL_UNIPHY
Jul 22 11:51:03 RECALBOX user.info kernel: [ 10.817394] [drm] Connector 2:
Jul 22 11:51:03 RECALBOX user.info kernel: [ 10.817396] [drm] VGA-1
Jul 22 11:51:03 RECALBOX user.info kernel: [ 10.817399] [drm] DDC: 0x64d8 0x64d8 0x64dc 0x64dc 0x64e0 0x64e0 0x64e4 0x64e4
Jul 22 11:51:03 RECALBOX user.info kernel: [ 10.817400] [drm] Encoders:
Jul 22 11:51:03 RECALBOX user.info kernel: [ 10.817402] [drm] CRT1: INTERNAL_KLDSCP_DAC1
Jul 22 11:51:03 RECALBOX user.info kernel: [ 11.292043] snd_hda_codec_hdmi hdaudioC0D0: HDMI ATI/AMD: no speaker allocation for ELD
[code]

Thanks @gnubit.
This was pretty helpful thank you.

Hi
I've decided to put an old Asus Eee PC 1015BX to good use and installed Recalbox to run snes, nes and megadrive emulation.

The specs of the netbook are not very good but would have exceeded that of those systems at the time. So far, running recalbox on the netbook itself has been a real pleasure given the diminutive specs, however, when I try to connect it to a tv or a monitor via HDMI or VGA nothing* is displayed.

Now, when I say nothing*, I mean the following behaviour is observed on the TV and monitor I tried.

• Splash screen for laptop is displayed
• Grub bootloader is displayed - chose verbose
• Verbose output is displayed and followed
• After this I'll either see a screen full of verticle scanlines, pixel noise in various shades of green, or the rarest (and therefore my favourite), random tiles made up of various parts of the UI.
  This occurs in the top half of the netbook screen (the recalbox splash screen appears in the bottom half) and also on the entire screen of the connected tv/monitor.

Once I get to this point, I can see the UI on the netbook screen displaying in the bottom half of the screen, nothing displayed in the top half and nothing displayed at all on the tv/monitor

I've had a look at the documentation for configuring a display -https://github.com/recalbox/recalbox-os/wiki/Video-configuration-detailled-(EN)
but this seems to be very specific to raspi configurations and I couldn't find an alternative guide for windows.
I've also tried setting "global.videomode=CEA 16 HDMI" in the recalbox.conf but that doesn't appear to work.

Specs for the netbook are as follows
RAM: 1GB (b*mped to 8gb for testing)
CPU: AMD APU C60 1.0GHz (dual core)
GPU: Radeon HD 6290

Not sure if I was initially looking in the right place in relation to HDMI config. Perhaps there is some other config file I would need to modify? Maybe it's just a hardware compatibility issue. Any info or advice would be greatly appreciated.
Cheers!