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@ -49,6 +49,35 @@ To uninstall it, run:
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# make -f Makefile.dkms uninstall
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Lenovo IdeaPad Y470/Y570
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------------------------
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Until [this kernel bug](https://bugzilla.kernel.org/show_bug.cgi?id=42696) is
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fixed, you need to apply an ugly hack on these laptops to make bbswitch and the
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driver (both nouveau and nvidia) work. For now I have decided not to put the
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hack in the bbswitch module since it is a very ugly hack that is comparable to
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writing a maximum allowable speed of 130 km/h on a traffic sign for a road
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where 120 km/h is allowed just because the radar gun does not work properly.
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To make use of it, use the `hack-lenovo` branch. An example using DKMS:
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$ git clone git://github.com/Bumblebee-Project/bbswitch.git -b hack-lenovo
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$ cd bbswitch
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$ mkdir /usr/src/acpi-handle-hack-0.0.1
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# cp Makefile acpi-handle-hack.c /usr/src/acpi-handle-hack-0.0.1
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# cp dkms/acpi-handle-hack.conf /usr/src/acpi-handle-hack-0.0.1
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# dkms add acpi-handle-hack/0.0.1
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# dkms build acpi-handle-hack/0.0.1
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# dkms install acpi-handle-hack/0.0.1
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If everything goes well, you now need to get the hack loaded on boot. On
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Ubuntu and Debian, this can be done with:
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echo acpi-handle-hack | sudo tee -a /etc/modules
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sudo update-initramfs -u
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For other systems, adopt the instructions from the *Disable card on boot*
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section below. Please do not copy these instructions to blogs/forums/whatever
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without warning that the method is a hack (you can refer to the metaphore above)
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and that it may crash the machine if incorrectly applied.
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Usage
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-----
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Lekensteyn
13 years ago