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[solved] Xorg no screens found (on radeon card)
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fresherthanever
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Joined: 11 Nov 2013
Posts: 40
Location: Houston

PostPosted: Tue Dec 20, 2016 2:23 am    Post subject: [solved] Xorg no screens found (on radeon card) Reply with quote

Hi all. I get the following error when running startx in Xorg.0.log:

Code:
(WW) Falling back to old probe method for modesetting
(EE) No devices detected.
(EE)
Fatal server error:
(EE) no screens found(EE)


For context, I just installed a new graphics card in addition to my old graphics card, that is, I had a Radeon HD 7950 and I added in a AMD R5 240 (OEM) card which I plan to use my host card when passing the other 7950 through. However, currently, I cannot get the X server to start with the original HD 7950 connected to my screen like my original set up. I am running xorg-server-1.18.4 and I have xf86-video-ati-7.7.0 installed. The only major thing I changed in the kernel was that I added the firmware blobs for the R5 240 (Oland series) in addition to my firmware for the 7950. lspci -k and dmesg both reveal that both cards are recognized and are running under the radeon kernel driver.

Kernel config in case I messed up KMS or if something else is up: http://pastebin.com/chiy8kdn

Any help would be appreciated.

Thanks.

EDIT:
It seems that I had forgot to add a file in the xorg.conf.d which set up a monitor to each card. I needed:
Code:

Section "Device"
   Identifier "radeon0"
   Driver "radeon"
   BusID "PCI:1:0:0"
EndSection


for each card in my system.
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