diff --git a/README.md b/README.md index 72e3d20..ecec562 100644 --- a/README.md +++ b/README.md @@ -49,6 +49,35 @@ To uninstall it, run: # make -f Makefile.dkms uninstall +Lenovo IdeaPad Y470/Y570 +------------------------ +Until [this kernel bug](https://bugzilla.kernel.org/show_bug.cgi?id=42696) is +fixed, you need to apply an ugly hack on these laptops to make bbswitch and the +driver (both nouveau and nvidia) work. For now I have decided not to put the +hack in the bbswitch module since it is a very ugly hack that is comparable to +writing a maximum allowable speed of 130 km/h on a traffic sign for a road +where 120 km/h is allowed just because the radar gun does not work properly. + +To make use of it, use the `hack-lenovo` branch. An example using DKMS: + + $ git clone git://github.com/Bumblebee-Project/bbswitch.git -b hack-lenovo + $ cd bbswitch + $ mkdir /usr/src/acpi-handle-hack-0.0.1 + # cp Makefile acpi-handle-hack.c /usr/src/acpi-handle-hack-0.0.1 + # cp dkms/acpi-handle-hack.conf /usr/src/acpi-handle-hack-0.0.1 + # dkms add acpi-handle-hack/0.0.1 + # dkms build acpi-handle-hack/0.0.1 + # dkms install acpi-handle-hack/0.0.1 +If everything goes well, you now need to get the hack loaded on boot. On +Ubuntu and Debian, this can be done with: + + echo acpi-handle-hack | sudo tee -a /etc/modules + sudo update-initramfs -u +For other systems, adopt the instructions from the *Disable card on boot* +section below. Please do not copy these instructions to blogs/forums/whatever +without warning that the method is a hack (you can refer to the metaphore above) +and that it may crash the machine if incorrectly applied. + Usage ----- diff --git a/dkms/acpi-handle-hack.conf b/dkms/acpi-handle-hack.conf new file mode 100644 index 0000000..682d7e2 --- /dev/null +++ b/dkms/acpi-handle-hack.conf @@ -0,0 +1,7 @@ +PACKAGE_NAME="acpi-handle-hack" +PACKAGE_VERSION="0.0.1" +MAKE[0]="make KVERSION=$kernelver modname=acpi-handle-hack" +CLEAN="make clean" +BUILT_MODULE_NAME[0]="acpi-handle-hack" +DEST_MODULE_LOCATION[0]="/kernel/drivers/acpi" +AUTOINSTALL="yes"