You may know that you can run OpenCL program as root without Xserver. I found patch which enable running the OpenCL programs even without
Download catalyst driver. Then run
chmod +x amd-driver-installer-*-x86.x86_64.run ./amd-driver-installer-*-x86.x86_64.run --extract ./fglrx cd fglrx
Open file common/lib/modules/fglrx/build_mod/firegl_public.c and find KCL_PosixSecurityCapCheck function.
modify this function to this
int ATI_API_CALL KCL_PosixSecurityCapCheck(KCL_ENUM_PosixSecurityCap cap)
{ if(cap == KCL_SECURITY_CAP_GENERAL_SYS_ADMIN) { return 1; } if (cap >= KCL_SECURITY_CAP_NUM) { return 0; } return capable(KCL_MAP_PosixSecurityCap[cap]);
}
then run. change according to distro you use.
./ati-installer.sh 13.35.1005 --buildpkg Ubuntu/saucy cd .. sudo dpkg -i fglrx*.deb
reboot. now if you run clinfo it will still find only CPU. that is because there is no devices in /dev/ati/. If you run "sudo clinfo" once it will create them. after that you must change permission on them with "sudo chmod 666 /dev/ati/*" after this you can run any OpenCL program without Xserver running and as a normal user. To setup /dev/ati permission you can add upstart job. Place this script to /etc/init/opencl.conf
description "Set up /dev/ati/" start on filesystem script clinfo > /dev/null chmod 666 /dev/ati/* end script
This can enable privilege escalation. Use on your own risk.
Thanks to lgeek/catalyst-test-compat-headless-opencl · GitHub