Install the Ubuntu AMD Catalyst Drivers (via remote login): NB: We want to install the drivers when all the graphics cards are already attached, since driver installation appears to perform some special initialization that will detect all currently connected graphics cards which very often fail to be detected when adding graphics cards later.
#Cgminer 4.9.2 how to#
Log in remotely via ssh, as your display will be unusable until you install the AMD drivers in the next step (see cryptobadger's link below for how to set up ssh and byobu). (Link: Reconfigure Xorg) sudo dpkg-reconfigure xserver-xorg Sudo apt-get install -reinstall libgl1-mesa-glx libgl1-mesa-dri xserver-xorg-core Sudo apt-get install xserver-xorg-video-ati Sudo apt-get remove -purge xserver-xorg-video-ati xserver-xorg-video-radeon (Link: Removing Catalyst/fglrx Drivers) sudo sh /usr/share/ati/fglrx-uninstall.sh Make sure nothing is sitting in any of the other motherboard PCIe slots (not even a PCIe riser). Make sure to disconnect both power connectors (6+8) to each card, and any supplementary power connector if you are using powered risers. Installation Procedureĭisconnect all graphics cards except the main display card. NB: You will need to install ssh and byobu in order to log in remotely to complete this procedure, as your display will be mostly unusable until you install the Ubuntu AMD drivers (see cryptobadger's link below for how to set up ssh and byobu). But I don't see why it shouldn't work with other Linux variants. Also, I've tested this procedure only on Ubuntu 13.10. However, I've tested (ad nauseam) only on the extremely fickle and finicky Gigabyte 990FXA UD5 with 1, 2, 3, 4 and 5 GPUs. The key component in the procedure below is recognizing that we want to install the drivers when all the graphics cards are already attached, since Ubuntu driver installation appears to perform some special initialization that will detect all currently connected graphics cards which very often fail to be detected when adding graphics cards later.ĭisclaimer: This procedure should work (in theory) for all motherboards (it would be cool to get some confirmation on this). The process below combines elements from 3 separate guides (references to original guides included). There are a few good guides available, but they are all missing some information, especially if you have previously installed or experimented with various AMD drivers. I've documented the procedure on how to get the full number of GPUs your motherboard will support, originally because I was having difficulty getting more than 2 cards working consistently (as in: "I'm going to throw this mobo out the window" difficulty). Using the procedure outlined below, you should be able to connect 5 or more of your graphics cards to your motherboard's PCIe slots, all at once.
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