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README: mention kmod, workaround for T410 (Fixes GH-58)

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Peter Wu
2013-05-28 19:40:57 +02:00
parent c665a74def
commit 2822d1630c
1 changed files with 8 additions and 2 deletions
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10
README.md
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@@ -104,8 +104,9 @@ same behavior as:
If not explictly set, the default behavior is not to change the power state of
the discrete video card which equals to `load_state=-1 unload_state=-1`.
The Lenovo T410s laptop needs the module option `skip_optimus_dsm=1`, otherwise
it will detect the wrong methods which result in the card not being disabled.
The Lenovo T410 and Lenovo T410s laptops need the module option
`skip_optimus_dsm=1`, otherwise it will detect the wrong methods which result in
the card not being disabled.
### Disable card on boot
@@ -116,6 +117,11 @@ get disabled on boot:
bbswitch load_state=0
Users of `kmod` should create `/etc/modprobe.d/bbswitch.conf` containing
`options bbswitch load_state=0` to set the default options. To load the module,
systemd users should create `/etc/modules-load.d/bbswitch.conf` containing
`bbswitch`.
You have to update your initial ramdisk (initrd) for the changes propagate to
the boot process. On Debian and Ubuntu, this can performed by running
`update-initramfs -u` as root.