65 lines
2.0 KiB
Markdown
65 lines
2.0 KiB
Markdown
# Lenovo ThinkPad T440p
|
|
|
|
This page describes how to run coreboot on [Lenovo ThinkPad T440p].
|
|
|
|
## Required proprietary blobs
|
|
|
|
Please see [mrc.bin](../../northbridge/intel/haswell/mrc.bin).
|
|
|
|
## Flashing instructions
|
|
|
|
T440p has two flash chips, an 8MB W25Q64FV and a 4MB W25Q32FV. To flash
|
|
coreboot, you just need to remove the big door according to the T440
|
|
[Hardware Maintenance Manual] and flash the 4MB chip.
|
|
|
|
|
|
|
|
To access the 8MB chip, you need to remove the base cover.
|
|
|
|
|
|
|
|
The flash layout of the OEM firmware is as follows:
|
|
|
|
00000000:00000fff fd
|
|
00001000:00002fff gbe
|
|
00003000:004fffff me
|
|
00500000:00bfffff bios
|
|
|
|
After flashing coreboot, you may need to re-plug the AC adapter to make
|
|
the laptop able to power on.
|
|
|
|
## Known Issues
|
|
|
|
- No audio output when using a headphone
|
|
- The touchpad is misconfigured, the 3 keys on top are all identified
|
|
as left button
|
|
- Cannot get the mainboard serial number from the mainboard: the OEM
|
|
UEFI firmware gets the serial number from an "emulated EEPROM" via
|
|
I/O port 0x1630/0x1634, but it's still unknown how to make it work
|
|
- The dGPU does not currently work in Windows.
|
|
|
|
## Working
|
|
|
|
- boot Arch Linux with Linux 4.19.77 from SeaBIOS payload
|
|
- integrated graphics init with libgfxinit
|
|
- EHCI debug: the port is the non-charging USB2 port on the right
|
|
- video output: internal (eDP), miniDP, dock DP, dock HDMI
|
|
- ACPI support
|
|
- keyboard and trackpoint
|
|
- SATA
|
|
- M.2 SATA SSD
|
|
- USB
|
|
- Ethernet
|
|
- WLAN
|
|
- WWAN
|
|
- bluetooth
|
|
- virtualization: VT-x and VT-d
|
|
- dock
|
|
- CMOS options: wlan, trackpoint, fn_ctrl_swap
|
|
- internal flashing when IFD is unlocked
|
|
- using `me_cleaner`
|
|
- dGPU (must be enabled in CMOS options)
|
|
|
|
[Lenovo ThinkPad T440p]: https://pcsupport.lenovo.com/us/zh/products/laptops-and-netbooks/thinkpad-t-series-laptops/thinkpad-t440p
|
|
[Hardware Maintenance Manual]: https://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles_pdf/t440p_hmm_en_sp40a25467_04.pdf
|