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nixpkgs/pkgs/os-specific/linux/displaylink/default.nix
Florian Klink 43f74794de displaylink: manually activate dlm.service
The shell script coming with the vendor-provided udev rule simply
starts dlm.service (and sets up some symlinks), and stops dlm.service if
that was the last card plugged in.

On NixOS, some of the cat/grep/sed commands are not available, causing
the script to fail.

Turns out, the symlinks aren't needed at all. Archlinux ships their own
script
(https://aur.archlinux.org/cgit/aur.git/plain/udev.sh?h=displaylink),
which only starts and stops dlm.service, depending on whether there's
cards left or not.

We can further optimize this by simply starting dlm.service on the first
card, and not stopping it at all. Considering dlm won't get stopped if
one of multiple cards is unplugged, it seems to handle disconnects.
2020-12-21 00:34:31 +01:00

76 lines
2.1 KiB
Nix

{ stdenv
, lib
, unzip
, util-linux
, libusb1
, evdi
, systemd
, makeWrapper
, requireFile
, substituteAll
}:
let
arch =
if stdenv.hostPlatform.system == "x86_64-linux" then "x64"
else if stdenv.hostPlatform.system == "i686-linux" then "x86"
else throw "Unsupported architecture";
bins = "${arch}-ubuntu-1604";
libPath = lib.makeLibraryPath [ stdenv.cc.cc util-linux libusb1 evdi ];
in
stdenv.mkDerivation rec {
pname = "displaylink";
version = "5.3.1.34";
src = requireFile rec {
name = "displaylink.zip";
sha256 = "1c1kbjgpb71f73qnyl44rvwi6l4ivddq789rwvvh0ahw2jm324hy";
message = ''
In order to install the DisplayLink drivers, you must first
comply with DisplayLink's EULA and download the binaries and
sources from here:
https://www.displaylink.com/downloads/file?id=1576
Once you have downloaded the file, please use the following
commands and re-run the installation:
mv \$PWD/"DisplayLink USB Graphics Software for Ubuntu ${lib.versions.majorMinor version}.zip" \$PWD/${name}
nix-prefetch-url file://\$PWD/${name}
'';
};
nativeBuildInputs = [ unzip makeWrapper ];
unpackPhase = ''
unzip $src
chmod +x displaylink-driver-${version}.run
./displaylink-driver-${version}.run --target . --noexec --nodiskspace
'';
installPhase = ''
install -Dt $out/lib/displaylink *.spkg
install -Dm755 ${bins}/DisplayLinkManager $out/bin/DisplayLinkManager
mkdir -p $out/lib/udev/rules.d
cp ${./99-displaylink.rules} $out/lib/udev/rules.d/99-displaylink.rules
patchelf \
--set-interpreter $(cat ${stdenv.cc}/nix-support/dynamic-linker) \
--set-rpath ${libPath} \
$out/bin/DisplayLinkManager
wrapProgram $out/bin/DisplayLinkManager \
--run "cd $out/lib/displaylink"
'';
dontStrip = true;
dontPatchELF = true;
meta = with stdenv.lib; {
description = "DisplayLink DL-5xxx, DL-41xx and DL-3x00 Driver for Linux";
maintainers = with maintainers; [ nshalman abbradar peterhoeg eyjhb ];
platforms = [ "x86_64-linux" "i686-linux" ];
license = licenses.unfree;
homepage = "https://www.displaylink.com/";
};
}