Difference between revisions of "Board:lenovo/t420s"

From coreboot
Jump to: navigation, search
Line 5: Line 5:
 
Issues:
 
Issues:
 
* yellow USB port isn't powered in power-off state.
 
* yellow USB port isn't powered in power-off state.
* Discrete GPU not supported - wip
 
 
* for i7 / Discrete GPU model - DisplayPort only connected to Discrete GPU -> does not work
 
* for i7 / Discrete GPU model - DisplayPort only connected to Discrete GPU -> does not work
* TPM - missing acpi
 
 
* Boot time issues after reboot (keyboard rest timeout)
 
* Boot time issues after reboot (keyboard rest timeout)
 
* ultrabay hot plug (event missing?)
 
* ultrabay hot plug (event missing?)

Revision as of 13:23, 7 July 2017

Status

Intel_Native_Raminit has it's own status page.

Issues:

  • yellow USB port isn't powered in power-off state.
  • for i7 / Discrete GPU model - DisplayPort only connected to Discrete GPU -> does not work
  • Boot time issues after reboot (keyboard rest timeout)
  • ultrabay hot plug (event missing?)
  • some power management states missing?
  • windows not supported

Proprietary Components Status

  • CPU Microcode
  • FDT(Flash Descriptor Table) => Always needed
  • ME(Management Engine) => you do not have to touch it(just leave it where it is)
  • GbE(Gigabit Ethernet embedded mac) => you do not have to touch it(just leave it where it is)

Code

  • The code has been merged into coreboot master:
 $ git clone https://review.coreboot.org/coreboot.git


Building Firmware

Please have a look at Intel_Sandybridge_Build_Tutorial.

Flashing

The flash chip can be a 8MB SOIC8 (Macronix MX25L6436EM2I / MX25L6406EM2I / Winbond W25Q64CVS) or WSON8 (Numonyx M25PX64).


Vendor firmware locks the flash and so you need to flash externally (unless until someone figures out a way around it). Lenovo firmware uses "protected regions" to protect the bootblock.