The wiki is being retired!
Documentation is now handled by the same processes we use for code: Add something to the Documentation/ directory in the coreboot repo, and it will be rendered to https://doc.coreboot.org/. Contributions welcome!
Coreboot supports all ThinkPad T60/T60p Series laptops.
- 1 Installation and Flashing
- 2 Wifi chipsets
- 3 Status
- 4 proprietary components status
- 5 Building the ROM without proprietary blobs
- 6 TODO
Installation and Flashing
Lenovo BIOS has a whitelist of approved PCI ID's for wifi cards. Coreboot does not, so you are free to use any wifi chipset of your choosing once coreboot is installed.
The Libreboot distribution lists Wifi chipsets not needing proprietary software to work.
This table needs review. I copied the x60 table and ran through it from memory, expresscard comes to mind...
|L1 cache enabled||OK|
|L2 cache enabled||OK|
|L3 cache enabled||N/A|
|Multiple CPU support||N/A|
|Dual channel support||OK|
|On-board IDE 3.5"||N/A|
|On-board IDE 2.5"||N/A|
|On-board Ethernet||OK||Intel 82573L|
|On-board Smartcard reader||N/A|
|On-board SD card reader||N/A|
|ISA add-on cards||N/A|
|Audio/Modem-Riser (AMR/CNR) cards||N/A|
|PCI add-on cards||N/A|
|Mini-PCI add-on cards||OK|
|Mini-PCI-Express add-on cards||Unknown|
|PCI-X add-on cards||N/A|
|AGP graphics cards||N/A|
|PCI Express x1 add-on cards||N/A|
|PCI Express x2 add-on cards||N/A|
|PCI Express x4 add-on cards||N/A|
|PCI Express x8 add-on cards||N/A|
|PCI Express x16 add-on cards||N/A|
|PCI Express x32 add-on cards||N/A|
|HTX add-on cards||N/A|
|Legacy / Super I/O|
|Serial port 1 (COM1)||OK||located in docking station|
|Serial port 2 (COM2)||N/A|
|Sensors / fan control||OK|
|CPU frequency scaling||OK|
|Other powersaving features||OK|
|Nonstandard LEDs||OK||LEDs are controlled by Embedded Controller (EC). Working without special support.|
|High precision event timers (HPET)||OK|
|Random number generator (RNG)||N/A|
|Wake on modem ring||Unknown|
|Wake on LAN||Unknown|
|Wake on keyboard||Unknown|
|Wake on mouse||Unknown|
proprietary components status
- CPU Microcode (optional?) - works fine without. See http://download.intel.com/design/mobile/SPECUPDT/30922214.pdf
- VGA option rom (optional): Native graphics initialization (free replacement) is also available for models with a Intel gpu.
- EC(Embedded Controller) => you do not have to touch it(just leave it where it is)
Building the ROM without proprietary blobs
TODO: these instructions should still work, but they are outdated. Bring them up to date, using the latest coreboot revision.
This basically means:
- No microcode updates
- Native graphics (replacement for the proprietary Video BIOS / VGA Option ROM)
- GRUB2 payload
In this configuration, only GNU/Linux is known to work. If you plan to use other operating systems, you might be out of luck.
- Note, this configuration only works for T60's with the Intel GMA950 video chipset. ATI GPU won't work, because they lack native graphics support.
Download coreboot like usual:
git clone http://review.coreboot.org/coreboot cd coreboot
At the time of writing for (for these instructions), the following git revision was used:
Install all of the coreboot build dependencies listed at [http://www.coreboot.org/Build_HOWTO Build_HOWTO] and then build the crossgcc toolchain: <pre> make crossgcc-i386
Now you will want this basic configuration for X60/X60s (in make menuconfig):
General setup / Expert mode = enable General setup / Local version string = 79ETE7WW (2.27 ) Mainboard / Mainboard vendor = Lenovo Mainboard / Mainboard model = ThinkPad T60 / T60p Mainboard / ROM chip size = 2048 KB (2 MB) Mainboard / SMBIOS Serial Number = L3DKE06 Mainboard / SMBIOS Version Number = ThinkPad T60 Mainboard / SMBIOS Manufacturer = LENOVO Mainboard / SMBIOS Product name = 1951FEG Chipset / Include CPU microcode in CBFS = Do not include microcode updates Devices / Use native graphics initialization = enable Display / Keep VESA framebuffer = disable (disable for text-mode graphics, enable for coreboot vesa framebuffer) Console / Send console output to a CBMEM buffer = enable Payload / Add a payload = An ELF executable payload Payload / Payload path and filename = grub.elf Go back into Devices: Devices / Run VGA Option ROMs = disable Devices / Run Option ROMs on PCI devices = disable
SMBIOS values were taken by running dmidecode with the factory BIOS.
Note, the above assumes that you already built your grub.elf from source along with everything that you need. Building GRUB is not covered here.
Put your grub.elf in the coreboot directory and then run make. Alternatively, you could go back into menuconfig and select coreboot's own GRUB payload config, which will automatically download and build the GRUB payload. Building it yourself can be more flexible, though, since you get to choose what modules you want and you can use your own configs.
T60 with ATI Mobility Radeon
Model with an ATI gpu need an option for display to work. To do this look up the pci id using lspci and adapt CONFIG_VGA_BIOS_ID in menuconfig accordingly. e.g. "1002,7145"
You have to extract the ATI Option ROM from running system, as the vendor BIOS does patch the ATOMBIOS structure, but coreboot does not. Vendor BIOS does:
- Set IOBaseAddr offset
- Update connector list
- Update VRAM_UsageByFirmware
- Update MultimediaCapabilityInfo
- Update CompassionateData
- Update DAC_Info
- Update TDMS_Info
You can use radeon_bios_decode to decode the ATOMBIOS structure.
Non-free components replacements
Replace the non-free VGA option rom by making native graphics init work.See  (under review on 5345 changeset, review.coreboot.org]
- Create a Native graphics<->VGA option rom. SeaVGABIOS (part of SeaBIOS) might be the answer. INT 10H and VBT are missing in native graphics.
Make backlight work without the non-free option rom.See 6731 on review.coreboot.org
Windows currently doesn't boot (STOP A5 error)
Windows 7 was tested and fails to boot at the moment.
The native graphics implementation lacks INT 10H and VBT, and GRUB cannot boot it. Booting with SeaBIOS+SeaVGABIOS results in graphical corruption (and no boot).
Booting with SeaBIOS and the VGA ROM (vbios) can be used to boot it, but booting ends with the message outlined here: STOP A5
More information can be found here
high pitched noise from the board during low power states
During low power state (cstate 3), a high-pitched "humming" noise eminates from the board. Some discussion has been made about this; suggestions include "using an oscilliscope in clever ways" (to detect where the noise is coming from to debug the issue). There are some workarounds:
Use "idle=halt" (higher power consumption) or "processor.max_cstate=2" (higher power consumption, but not as bad) kernel parameter in GRUB. These increase heat and power consumption. The CPU noise on core duo CPUs is highly reduced by https://review.coreboot.org/#/c/16901/ and likely was not a problem on core 2 duo CPUs.
Another option (for increased battery life and lower temperatures) is to use powertop --auto-tune, or set 'Tunables' in powertop (without any parameters). This solves noise coming from the USB ports which is not related to the CPU low power states.
ATOMBIOS parser / updater
Implement a ATOMBIOS updater in coreboot to patch the ATI Option ROM.
- Add support for more batteries in ACPI.
- Make the wifi card and/or the laptop produce less heat.
- Sometimes some dock USB port aren't initialized => fix that