Difference between revisions of "Board:lenovo/t420s"
From coreboot
(Created page with "== Status == Issues: * yellow USB port isn't powered in power-off state. * Discrete GPU not supported * for i7 / Discrete GPU model - DisplayPort only connected to Discrete G...") |
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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 | + | * 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 | * 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?) | ||
| − | * some power management states missing | + | * some power management states missing? |
* windows not supported | * windows not supported | ||
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
- 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.
