Rather late, however I had a similar issue on my desktop (not at home for the time being, and will need to repair the hard drive when I return, so no way to test anything), however by simply refreshing XRandr's information (via radeon-profile), my TV (old, low-end, with bloated capacitors, 42" 1080p non-smart TV that I got from a friend that was throwing it out after replacing it with a 4K smart TV) was instantly picked up, though I had to due this each time I connected or disconnected it to my Radeon HD6950.

With the Intel iGPU, both on my desktop and laptop, the connection is automatic, however on preGCN Radeon GPUs (no idea about GCN and RDNA), the connection is manual for some odd reason.

In T8904#171204, @moriel5 wrote:

Rather late, however I had a similar issue on my desktop (not at home for the time being, and will need to repair the hard drive when I return, so no way to test anything), however by simply refreshing XRandr's information (via radeon-profile), my TV (old, low-end, with bloated capacitors, 42" 1080p non-smart TV that I got from a friend that was throwing it out after replacing it with a 4K smart TV) was instantly picked up, though I had to due this each time I connected or disconnected it to my Radeon HD6950.

With the Intel iGPU, both on my desktop and laptop, the connection is automatic, however on preGCN Radeon GPUs (no idea about GCN and RDNA), the connection is manual for some odd reason.

First of all, thank you for your reply. I currently do not have access to my PC rig as I'm in another place, but I think next week I can test it out and comment the results here.

My GPU (RX480) is GCN gen 4, but my CPU is older, a 4th gen Intel. I think there is some bug or error where the motherboard output don't get detected but only with AMD + old Intel setups on Solus.

Sadly, your issue is related to the dGPU display outcome, not the iGPU display outcome, so I think it probably won't work but its worth a try, thank you anyway.

@juliocormor With pleasure. I hope your issue will get resolved, though.

In T8904#171295, @moriel5 wrote:

@juliocormor With pleasure. I hope your issue will get resolved, though.

I'm home and trying to test your solution. I'm not sure what do you mean with "refresh XRandr's information via radeon-profile". I have radeon-profile installed but i can't find any options to do that?

Also, I think on the distros the second screen worked were using the modesetting driver for the iGPU, while in Solus the system it's using Intel driver. I have read about how to change it but I'm not sure how. If someone helps me change drivers I think the issue is solved.

Sorry for the off topic, can I ask about the theme you are using?

In T8904#171584, @juliocormor wrote:

In T8904#171295, @moriel5 wrote:

@juliocormor With pleasure. I hope your issue will get resolved, though.

I'm home and trying to test your solution. I'm not sure what do you mean with "refresh XRandr's information via radeon-profile". I have radeon-profile installed but i can't find any options to do that?

Also, I think on the distros the second screen worked were using the modesetting driver for the iGPU, while in Solus the system it's using Intel driver. I have read about how to change it but I'm not sure how. If someone helps me change drivers I think the issue is solved.

Sorry I wasn't online, I had no reception for most of the day until thursday last week, and I did not have time to fire up my laptop until now (I'm not at home most of the time, since I am at the place I study).

There is a "refresh" button in radeon-profile's GUI, though I cannot currently show a screenshot, since I am on my laptop, and not at home.

In T8904#172361, @KingLucius wrote:

Sorry for the off topic, can I ask about the theme you are using?

Yes, sorry I was late but I have been on exams and haven't booted Linux either checked forums.

I have McMojave for the apps and system, Capitaine Cursors well, for the cursor and McMojave-circle for the icons.

Sorry it took so long, however here is the screenshot (taken ages ago):

Thanks for the response @moriel5, but I ended up connecting both of the screens to the GPU.

I also upgraded my PC to a new Ryzen 3600, same GPU though.

I have the old one laying arround to try and mount a server, so I could install Solus and test it but what's the point.