Atom 15 and R9-380x

[Foxhole]

Well, i'm trying to install a gigabyte r9-380x gpu and unfortunately having issues with atom-15. 
Atom-15 is successful at patching the bios, but the pc will show the post screen for about half a second and then the monitor loses the signal and shows "No Vga Cable".
It's currently connected to an lcd that supports 15khz, didn't wanna take any risk with a crt.
Windows will not bootup as long as the vga cable is connected.
If connecting only a display port cable, windows will boot.
Tried with and without crtemudriver installed, no difference.
But if i start the pc with only display port connected, and then change to vga cable, i get a picture.
In vmm maker it shows two analog outputs, dvi-i and vga,
on the card there's only one analog output, dvi-i.
Here's a weird issue, if i have the modded bios installed, and try to enable edid emulation for dvi-i, that causes a signal loss every time i start Arcadeosd or vmmmaker, forcing me to reconnect the vga cable to get the signal back(This is an lcd, not a crt, i'm guessing on a crt it will just lose the signal for a brief moment.)
If the original bios is installed, this issue doesn't happen.
Regardless, The actual correct output in vmm maker is vga and not dvi-i.
I wanted to state all of that in the case it helps troubleshoot the issue with atom-15.
I am more than willing to try everything you'd like, Calamity, and i'm not afraid of bricking.
Unfortunately this is my second card in a row that has issues with atom-15, i would really like to try and get this one up and running.
I've included the original bios and modded.

[kill_one]

hello @FoxHole you have problem witch R9 380x when change resolution with 640x480 and 640x240 if you use?

[Foxhole]

Hi, Kill_one, I'm not using r9 380x because of Atom-15, but when i used it I didn't have any problems.

[buttersoft]

Interesting that you got the 380x working at all, this is the first report we've had of one that did, AFAIK. Normally you can't patch the bios.

Hopefully calamity has a magic fix, but it sounds like an issue with the card. Was this issue present before you patched the bios?

[Foxhole]

Interesting that you got the 380x working at all, this is the first report we've had of one that did, AFAIK. Normally you can't patch the bios.

Hopefully calamity has a magic fix, but it sounds like an issue with the card. Was this issue present before you patched the bios?

I'm not sure who you are referring to, but i was able to patch the bios of the R9-380X, but it doesn't actually work.
Without Atom-15, the R9-380X works just fine as long as you don't try to use the digital ports for 15khz.
I have a theory as to why the R9-380X doesn't work with atom-15, but it's just a theory.

[deezdrama]

I have an r9 380 and read its not compatible with atom 15.
Im just buttoning up my emulation pc build. I have a 8tb launchbox drive ive compiled from my arcade cabs roms and right now its just connected to an ultrawide lcd panel. Im hoping to instal groovymame, crt emudriver, set my super resolutions and be able to use the lcd as a marquee display/ navigation display for launchbox, then when I launch groovymame or retroarch games they will launch to my sony CRT.
Will I have any problems doing this?
I was just looking into atom15 for my setup but guess i wont be able to use it, so now what? Just wait untill im in windows on the lcd untill I turn on the crt?

[fuchi_jeg]

I have set my bios to post to the integrated graphics on the motherboard.
Depending on your bios options you can post to the LCD and use your crt as primary once the pc boots. I'm using windows 7 and the first thing visible is the windows login.

[deezdrama]

this seems like a viable simple solution. Why is atom15 needed then if posting can just be thrown to a different screen or the onboard vga?

UPDATE.... Good call, this works!
I enabled onboard graphics in bios and set IGFX as main display and so my crt gets no signal untill in windows. Thanks for the tip!

[deezdrama]

Well, enabling integrated graphics on the motherboard has kept the pc from posting to the crt but ive been troubleshooting my setup for weeks because bigbox just wont output 240p through retroarch nomatter what I try even though it does 240p fine through retroarch directly.... Im starting to wonder if this extra faux display I set for the pc to post to is causing conflict with my setup and looking for another option.

Any other option for the r9 380/380x?

[fuchi_jeg]

I set the bios post to IGPU and then removed the LCD display after the pc rebooted a few times. I'm no expert, but most emulators cant send signal to a display that isnt connected. I'm using hyperspin as a front end and do not use retroarch. I have  read a few  posts where guys have issues with a secondary  display. Its rarely necessary.

[deezdrama]

I wasnt having any issues with the igfx display, Ive just been troubleshooting my setup for weeks and removing possible causes for testing

[ArcadiusMaximus]

Hello, I'm getting ready to do a similar set up as you with the same video card as you. Has setting IGFX to primary in the BIOS fixed your problem? I too am wondering if there is any point in messing with Atom15 anymore if you can protect the display in this round about way. I'm using a retrotek VGACTV2 as well which I believe has a built in screen protect if it cannot detect a 15Khz signal. So double protection.

[Rahzel]

I haven't been able to get Atom-15 to flash properly with my Gigabyte R9 380 either so I've resorted to using the IGX method. I set the "Init First Display" as Onboard VGA and the computer boots with my secondary display on my Onboard graphics just fine, but then when Windows 7 loads it doesn't switch over to my CRT (on PCI slot), the display just remains on the Onboard VGA.

Is there a setting that I'm missing so that my CRT is displayed when Windows starts?

[buttersoft]

I'm assuming you've setup crt_emudriver properly by following the guide for your card, and you've got everything running at 15kHz first. And you have enabled EDID emulation? Otherwise those two things are definitely the first steps.

After that I'm guessing, but...  If you keep an LCD plugged into the onboard VGA port, does it show the desktop ok? And if so, at what res? Given you've enabled EDID emulation on the GPU, you should be able to see the CRT on that port (called Arcade15 or whatever preset you used) at all times, even when powered off or even unplugged.

If you can't get an image that way, try hot plugging an LCD in and see if any port will give you an image, or even an out-of-range notification (if it does this last, it might be pushing 15kHz).

[Rahzel]

Thanks for your reply buttersoft, I havn't been able to get to this until today.

Yes I've had crt_emudriver with EDID set properly for a while, I just wanted to perfect my setup by having the boot screen not output to my CRT at a dangerous range any longer.

So to answer your question when I keep my LCD plugged in with onboard gpu enabled, it does display my desktop resolution at 800 x 600. With this setup I checked my VMmaker and EDID was disabled I guess because my PCI card was not being initialized in my bios. It seems like when I enable IGX / Init First Display to onboard, it only uses that output rather than initializing it only for the boot screen then switching to my PCI card when Windows loads.

I have a Gigabyte GA-78LMT-USB3 motherboard and I'm not sure it will work as a work-around for Atom-15 because it seems like I can only initialize either onboard graphics OR my PCI video card, but not both.

[tronbaby]

Amazing - this has done the trick for me.  I have an R9 380X and I couldnt get Atom 15 to work and my Bios was sending a dodgy signal to my Blast City cab on startup - it had me worried.
In the bios I've enable the option to boot via the IGFX slot (which is unused) during POST and I dont see a thing now until AttractMode starts - beautiful stuff!  Thanks for the tip!