facetimehd: Only unload module if it is loaded

The pre-sleep service exits if any command fails. Unloading facetimehd
without it being loaded blocks subsequent commands from running.

Note: `modprobe -r` works a bit better when unloading unused modules,
and is preferrable to `rmmod`. However, the facetimehd module does not
support suspending. In this case, it seems preferable to forcefully
unload the module. `modprobe` does not support a `--force` flag when
removing, so we are left with `rmmod`.

See:
 - https://github.com/NixOS/nixpkgs/pull/14883
 - https://github.com/patjak/bcwc_pcie/wiki#known-issues
This commit is contained in:
Graham Christensen 2016-04-21 21:35:41 -05:00
parent a1b39b9990
commit 788122c3c5

View file

@ -31,7 +31,7 @@ in
# unload module during suspend/hibernate as it crashes the whole system
powerManagement.powerDownCommands = ''
${pkgs.kmod}/bin/rmmod -f facetimehd
${pkgs.kmod}/bin/lsmod | ${pkgs.gnugrep}/bin/grep -q "^facetimehd" && ${pkgs.kmod}/bin/rmmod -f -v facetimehd
'';
# and load it back on resume