137 lines
5 KiB
Nix
137 lines
5 KiB
Nix
# The bumblebee package allows a program to be rendered on an
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# dedicated video card by spawning an additional X11 server
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# and streaming the results via VirtualGL to the primary server.
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# The package is rather chaotic; it's also quite recent.
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# As it may change a lot, some of the hacks in this nix expression
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# will hopefully not be needed in the future anymore.
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# To test: make sure that the 'bbswitch' kernel module is installed,
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# then run 'bumblebeed' as root and 'optirun glxgears' as user.
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# To use at startup, add e.g. to configuration.nix:
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# jobs = {
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# bumblebeed = {
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# name = "bumblebeed";
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# description = "Manages the Optimus video card";
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# startOn = "started udev and started syslogd";
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# stopOn = "starting shutdown";
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# exec = "bumblebeed --use-syslog";
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# path = [ pkgs.bumblebee ];
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# environment = { MODULE_DIR = "${config.system.modulesTree}/lib/modules"; };
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# respawn = true;
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# };
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# };
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# This nix expression supports for now only the native nvidia driver.
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# It should not be hard to generalize this approach to support the
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# nouveau driver as well (parameterize commonEnv over the module
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# package, and parameterize the two wrappers as well)
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{ stdenv, fetchurl, pkgconfig, help2man
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, libX11, glibc, glib, libbsd
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, makeWrapper, buildEnv, module_init_tools
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, linuxPackages, virtualgl, xorg, xkeyboard_config
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}:
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let
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version = "3.0";
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name = "bumblebee-${version}";
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# isolated X11 environment with the nvidia module
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# it should include all components needed for bumblebeed and
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# optirun to spawn the second X server and to connect to it.
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commonEnv = buildEnv {
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name = "bumblebee-env";
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paths = [
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module_init_tools
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linuxPackages.nvidia_x11
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xorg.xorgserver
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xorg.xrandr
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xorg.xrdb
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xorg.setxkbmap
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xorg.libX11
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xorg.libXext
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virtualgl
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];
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# the nvidia GLX module overwrites the one of xorgserver,
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# thus nvidia_x11 must be before xorgserver in the paths.
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ignoreCollisions = true;
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};
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# Custom X11 configuration for the additional xserver instance.
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xorgConf = ./xorg.conf.nvidia;
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in stdenv.mkDerivation {
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inherit name;
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src = fetchurl {
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url = "http://github.com/downloads/Bumblebee-Project/Bumblebee/${name}.tar.gz";
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sha256 = "a27ddb77b282ac8b972857fdb0dc5061cf0a0982b7ac3e1cfa698b4f786e49a1";
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};
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# 'config.patch' makes bumblebee read the active module and the nvidia configuration
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# from the environment variables instead of the config file:
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# BUMBLEBEE_DRIVER, BUMBLEBEE_LDPATH_NVIDIA, BUMBLEBEE_MODPATH_NVIDIA
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# These variables must be set when bumblebeed and optirun are executed.
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patches = [ ./config.patch ./xopts.patch ];
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preConfigure = ''
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# Substitute the path to the actual modinfo program in module.c.
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# Note: module.c also calls rmmod and modprobe, but those just have to
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# be in PATH, and thus no action for them is required.
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substituteInPlace src/module.c \
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--replace "/sbin/modinfo" "${module_init_tools}/sbin/modinfo"
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# Don't use a special group, just reuse wheel.
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substituteInPlace configure \
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--replace 'CONF_GID="bumblebee"' 'CONF_GID="wheel"'
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# Ensures that the config file ends up with a nonempty
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# name of the nvidia module. This is needed, because the
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# configuration handling code otherwise resets the
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# data that we obtained from the environment (see config.patch)
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export CONF_DRIVER_MODULE_NVIDIA=nvidia
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'';
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# Build-time dependencies of bumblebeed and optirun.
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# Note that it has several runtime dependencies.
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buildInputs = [ stdenv makeWrapper pkgconfig help2man libX11 glib libbsd ];
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# create a wrapper environment for bumblebeed and optirun
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postInstall = ''
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# remove some entries from the configuration file that would otherwise
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# cause our environment variables to be ignored.
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substituteInPlace "$out/etc/bumblebee/bumblebee.conf" \
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--replace "LibraryPath=" "" \
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--replace "XorgModulePath=" ""
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wrapProgram "$out/sbin/bumblebeed" \
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--prefix PATH : "${commonEnv}/sbin:${commonEnv}/bin:\$PATH" \
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--prefix LD_LIBRARY_PATH : "${commonEnv}/lib:\$LD_LIBRARY_PATH" \
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--set BUMBLEBEE_DRIVER "nvidia" \
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--set BUMBLEBEE_LDPATH_NVIDIA "${commonEnv}/lib" \
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--set BUMBLEBEE_MODPATH_NVIDIA "${commonEnv}/lib/xorg/modules" \
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--set FONTCONFIG_FILE "/etc/fonts/fonts.conf" \
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--set XKB_BINDIR "${xorg.xkbcomp}/bin" \
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--set XKB_DIR "${xkeyboard_config}/etc/X11/xkb"
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wrapProgram "$out/bin/optirun" \
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--prefix PATH : "${commonEnv}/sbin:${commonEnv}/bin" \
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--prefix LD_LIBRARY_PATH : "${commonEnv}/lib" \
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--set BUMBLEBEE_DRIVER "nvidia" \
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--set BUMBLEBEE_LDPATH_NVIDIA "${commonEnv}/lib" \
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--set BUMBLEBEE_MODPATH_NVIDIA "${commonEnv}/lib/xorg/modules"
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cp ${xorgConf} "$out/etc/bumblebee/xorg.conf.nvidia"
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'';
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meta = {
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homepage = http://github.com/Bumblebee-Project/Bumblebee;
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description = "Daemon for managing Optimus videocards (power-on/off, spawns xservers)";
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license = "free";
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};
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}
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