WHo are you and what have you done with the real Factorio devs???

This isn't an esoteric setup. This is just Linux running X windows.

I have been running factorio for several years; I don't want a refund.
You guys were able to help me before; I was adding to the existing discussion on this. What changed?

P.S. Version 1.1.42

Hello. I am sorry to report that this behavior is back. To recap: I was running Debian 8 with the nvidia driver installed before. Running factorio would report 0Hz refresh rate, and xrandr did not work. I disabled Xinerama (which required that I go down from 4 to 3 monitors). After this, the refresh...

Something seems to have changed with heat pipes. In 0.17.60, my 2x4 reactors were able to drive all of my steam turbines. Now, however, the end ones are not receiving enough heat to operate; temperature drops to 500 degrees too early. Not sure if my design was taking advantage of a bug that is now f...

Sorry... forgot to post results last night. Firstly, no worries: I always upgrade to latest/greatest, so I was on .55 before trying the suggestions, anyway :-). Bad news, good news and bad news. Bad news: making the changes had no effect. Good news: I searched for "nvidia xinerama performance i...

P.S., I was using the 410.78 nvidia driver. As part of trying to get randr working this past weekend, I upgraded to 430.26 and the issue is there as well.

If it is indeed a performance issue in the driver, it has been there for a while and is still there.

Odd that it only spins CPU in the nvidia driver when using xinerama. Same driver works fine without xinerama. Will test the ogl / SDL settings tonight. It would be great if there is a setting that would allow this to run with xinerama. Seems like there should be since the same driver works without i...

Any news? I am still dead in the water on my desktop. If I disable Xinerama, then Factorio works fine, but I only get two monitors. To see all four, I need to enable Xinerama, but then Factorio uses 100% CPU and is slow to respond. Tried everything I could find online about configuring nvidia, but i...

So, my computer was dead for most of the weekend. Could only get it working on two monitors. Finally managed to get it back into a working 4 monitor state, but had to re-enable Xinerama to do it. None of the links I found earlier helped. So, I am back where I started: working 4 monitor setup with Xi...

The good news: I disabled xinerama and now xrandr appears to be working. Even better, Factorio is running just fine. The bad news: this has trashed my multiple monitor display. I am now down to one monitor and the documentation from nvidia is just plain wrong: http://download.nvidia.com/XFree86/Linu...

I am also happy to run a copy of factorio with any tracing turned on that you might have. The only thing I have done for that so far is strace, which shows the process spinning on the same sequence of calls indefinitely (see post from a couple of days ago).

Found this: https://unix.stackexchange.com/questions/123862/how-can-i-get-xrandr-to-detect-both-nvidia-cards-2-x-gtx480-triple-head Is very scary and painful, as my experience with nvidia X is that I cannot get my current setup back just by saving and restore the xorg.conf file. But, I will try this...

Xinerama. Was trying to remember what the name of the thing was instead of xrandr. I would have to look for the source again, but when I was originally configuring this desktop, I could not use xrandr and had to use xinerama. At the time, the docs I read implied that there was a general move away fr...

Aha... I looked into it and remembered the issue. I cannot use xrandr because I have multiple video cards. I have two ganged GTX 960 video cards, each driving two monitors. The RAndR extension does not work in this setup.

Are you calling xrandr or are you using an API? If the former, then I can write a script to produce the expected output and put it ahead of the real xrandr in the PATH...

Well, xrandr, as I understand it, is going away as a protocol, so it would well-behoove you to look at more generic APIs. A thought... can you add a variable to the configuration file for factorio that, if present, overrides the refresh rate? If so, then I could put in the value and test whether tha...

Not using xrandr. That would be my preference, but it does not work on my setup; I forget the reason. I think it is just unsupported with the nvidia X.

No special settings. Specifically, no changes between runs. More explicitly: Run Factorio 0.16. Runs fine. Plays fine. Run Factorio 0.17.52. 100% CPU and lag. Run Factorio 0.16. Runs fine. Plays fine. No changes or reboots or anything between the above three steps. Same three steps on my laptop prod...

Many thanks; I am going to delete it from GD, now.
Let me know if there is anything further I can do to help!