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title: Install Canoeboot on Lenovo ThinkPad T440p x-toc-enable: true ...
PLEASE READ THESE INSTRUCTIONS BEFORE INSTALLING, OR YOU MAY BRICK YOUR MACHINE!! - Please click the link and follow the instructions there, before flashing. For posterity, here is the link again.
Open source BIOS/UEFI firmware
This document will teach you how to install Canoeboot, on your Lenovo ThinkPad T440p laptop motherboard. Canoeboot is a Free Software project that replaces proprietary BIOS/UEFI firmware.
Preparing a release Rom
4MB CBFS
CBFS is 4MB on this board, so when external flashing, you can just break off the upper 4MB part of the image and flash that. Keep this in mind if you're flashing externally.
When externally flashing the lower 8MB part, you can optionally flash the IFD and GbE regions if that is appropriate for your setup.
Splitting The Rom
You can use dd to easily split your rom into the two separate portions for
external flashing.
dd if=canoeboot.rom of=top.rom bs=1M skip=8
dd if=canoeboot.rom of=bottom.rom bs=1M count=8
Flash the top chip with top.rom, and tho bottom chip with bottom.rom. Don't worry about knowing which chip is which on a standard setup; flashprog will let you know if the image size is incorrect for the chip you're flashing.
Disassembly
Start by removing the back cover screws and the main battery.
You can then remove the back cover by sliding it off. Next you need to:
- Unplug the cmos battery
- Unplug and unroute the fan cable
- Unplug and unroute the black LED cable
- Remove all visible screws
Note: the ultrabay screw will loosen, but not come out of the assembly
Now you can pull up around the sides of the bottom assembly to release it.
Pull it upwards and lift it open to the front of the machine like a clamshell.
Make sure not to break the wires connecting the assembly to the rest of the machine.
You should now be able to see the two flash chips near the RAM.
You can now proceed to flashing this machine.
Errata
thinkpad_acpi issues
It has been reported by that thinkpad_acpi does not load correctly on the T440p.
If you encounter this, check this page for details as to how to fix this.