From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dennis Schridde Subject: AMDGPU without display output Date: Thu, 13 Apr 2017 16:31:42 +0200 Message-ID: <2259850.ejp6DaCL9T@c07060> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0478962630==" Return-path: List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: amd-gfx-bounces-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org Sender: "amd-gfx" To: amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org --===============0478962630== Content-Type: multipart/signed; boundary="nextPart11244928.oNnvTFJaHV"; micalg="pgp-sha256"; protocol="application/pgp-signature" --nextPart11244928.oNnvTFJaHV Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Hello again! I am trying to use a AMD FirePro S7150X2 with the AMDGPU driver of a Linux 4.10.9 kernel (CoreOS Container Linux) and linux-firmware e39f0e3e6897ad865b3704f61218ae83f98a85da. Since the card has no display output and I want to run remote applications only, I would like to prevent any interference with mode setting and the kernel console. Thus I set "nomodeset" on the kernel command line to prevent the kernel from trying to initialise anything but the rendering functions of the card. However, this leads to following error message: [drm:init_module [amdgpu]] *ERROR* VGACON disables amdgpu kernel modesetting. The result is that the AMDGPU module can not be loaded. Is this generally the right approach to use this driver for rendering without display output, or can I safely leave KMS enabled and it will not interfere with my application's X servers and the OpenGL applications running on them? Assuming I have to disable KMS, how would I get past this error, i.e. to initialise the card's rendering functions, but skipping initialisation of the output part of the driver? Generally asking: How do people use this card for GPGPU compute (i.e. headless) tasks? Is there some documentation what I need to pay attention to? Thanks, Dennis --nextPart11244928.oNnvTFJaHV Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part. Content-Transfer-Encoding: 7Bit -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQG0BAABCAAGBQJY74vOAAoJENS5dBsVnRQdcSkMvjiKblwDJZgPH8ESBLd1Decr y0qnPRF+PwOSWj4D8v/LBx9qSosEjwcx8xGKqbXWSt4DQG/QlyvmKyGoDLkvkdLt E6ZhacBsKS/ULd6++MBsffyJxk5Ss0nwhVfBJPIrzPkLoXs/IofcpEGyqQUdyBH9 RaZy102FKXMeDWIWk0B0eGkSSbwlSZuvyq/ArUkrVPKrLn7Wx27PmGcDHsnGgwT4 phsI01ib4tsgBU0BhoGmWI60akFdPgPIg9Bmagn5ir3MmAnXc6VhfjmqWxOOvAqz 3BqR1LlfHI2KpUeAeYTctHcxR177kmE/FoRXUJU4n/AferhxNvLVxTnGkJSmuPsv 04zchzkfoG+RoEmR0ru6AG4fBewG3wJzzv0eaIRxzNKZgdhcJv9FF1J5EY++4qrr LQ5y9fTpVgMmd429CGI+zfdQG6HLjuip2Z7NzPUgktjH3X90mg7/fDdJcKi1HWW9 Jw/QBbSuY83bvtNhjjsJM24RyvJGhDh+e+lq2IhnAlJwyqpDKI1prL7E+TKJtazk rRvGUq/3HQ== =9bBx -----END PGP SIGNATURE----- --nextPart11244928.oNnvTFJaHV-- --===============0478962630== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KYW1kLWdmeCBt YWlsaW5nIGxpc3QKYW1kLWdmeEBsaXN0cy5mcmVlZGVza3RvcC5vcmcKaHR0cHM6Ly9saXN0cy5m cmVlZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9hbWQtZ2Z4Cg== --===============0478962630==--