Submit #2178 » man_drm.patch
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd June 23, 2009
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.Dd November 8, 2011
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.Dt DRM 4
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.Os
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.Sh NAME
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.Ed
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.El
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.Pp
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If you have two graphic cards (i.e.: a on-board graphics and other AGP/PCI/PCIe
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card) and you would like use the secondary device with DRI, you will need
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create a link from /dev/dri/card1 to /dev/dri/card0 with
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.Xr devfsctl 8 .
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This is a old bug of Xorg, the DRI module only reads the first device.
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.Pp
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Debugging output can be enabled and disabled by setting the
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.Xr sysctl 8
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node
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