Board:lenovo/t420s: Difference between revisions

Revision as of 13:44, 3 January 2016

Status

Issues:

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
TPM - missing acpi
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

{{ #if: | * [{{{review_url}}} The code has been merged into coreboot master]: | * The code has been merged into coreboot master:}}

 $ git clone https://review.coreboot.org/coreboot.git

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.

@@ Line 3: / Line 3: @@
 Issues:
 * yellow USB port isn't powered in power-off state.
-* Discrete GPU not supported
+* Discrete GPU not supported - wip
 * 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)
-* no dmar (IOMMU)
 * ultrabay hot plug (event missing?)
-* some power management states missing
+* some power management states missing?
 * windows not supported