# (LC230) User Guide ## The Coreboot Boot Process Here is what the boot process looks like with Coreboot installed:
Coreboot Sequence Diagram
The first part of the boot process (labelled as "Coreboot Internal" in the diagram above) is largely hidden from the user. The boot process is illustrated below:
LC230 Boot Process
## Installing an OS To install any GNU/Linux OS, here is a sequence of steps: ### Build USB Installer Any GNU/Linux OS would work very well on your LC230 laptop. (Some owners have also installed and used FreeBSD on it.) LC230 is configured to run without any proprietary firmware and hence, any of the following operating systems would work well by default: * [Debian GNU/Linux (main)](https://debian.org) * [PureOS](https://pureos.net/) * [Triquel](https://trisquel.info/) !!! tip The [Rasperrby Pi Imager](https://www.raspberrypi.org/software/) is a good tool to use to write an OS image to a USB disk. [Balena Etcher](https://www.balena.io/etcher/) is another one. ### Plug-in USB Disk The USB needs to be plugged in before you reboot the laptop - or else SeaBIOS will not detect it and show it as a boot option. !!! info The blue USB ports on the left side of the laptop are USB3 ports. If you have a USB disk that works with USB3, then using these ports will give you much better USB disk performance. The USB port on the right side (yellow in colour) is a USB2 port. ### Choose the boot device Press ++escape++ on boot and choose the USB disk as the boot device
LC230 Boot Image
By default, the first boot option is chosen to boot off. This is usually the 2.5" SATA disk if it is plugged in to the laptop. To choose another boot device, you need to press ++escape++ and then choose the desired boot device from the SeaBIOS menu. If you have a 2.5" SATA disk, then a USB disk would be the second boot device. If you have a 2.5" SATA disk **and** a mSATA disk, then the USB disk would be the third boot device.
LC230 USB3 Ports
### Install the OS You can now proceed with the OS installation as normal. The LC230 does not provide a UEFI BIOS (like the default Lenovo BIOS firmware). SeaBIOS is a pc-bios payload and most GNU/Linux OS installers will detect that and install the correct bootloader. This would be `grub-pc` if you choose to use Grub and Debian. ## Coreboot Internal Flashing To flash Coreboot to the x230 motherboard, the first step is to flash the BIOS externally - ie. using a SIOC-8 flashing clip connecting to the BIOS chips:
Liberating the LC230 via External Flashing
However, as a part of the external flashing process, the BIOS is unlocked. This means that you can update / modify the BIOS on the SPI Flash internally - from within the operating system. Here are some reasons to do that and the steps involved. ### Configure the kernel The first things to do before you can flash Coreboot internally, is to boot the kernel with an additional option: iomem=relaxed On Debian (and derived operating systems such as Ubuntu), you can make this a permanent setting: 1. Edit the file: `/etc/default/grub` 2. Update the line `GRUB_CMDLINE_LINUX` to read: `GRUB_CMDLINE_LINUX="iomem=relaxed"` 3. Run: `update-grub` to update the Grub configuration. ### Query Coreboot details You can verify the coreboot version (as well as the fact that you're running coreboot) by using the `dmidecode` utility as follows: #### BIOS version ``` console $ sudo dmidecode -t bios # dmidecode 3.3 Getting SMBIOS data from sysfs. SMBIOS 2.8 present. Handle 0x0000, DMI type 0, 26 bytes BIOS Information Vendor: coreboot Version: CBET4000 4.10-1082-g4357a82076-dirty Release Date: 10/20/2019 ROM Size: 12 MB Characteristics: PCI is supported PC Card (PCMCIA) is supported BIOS is upgradeable Selectable boot is supported ACPI is supported Targeted content distribution is supported BIOS Revision: 4.10 Firmware Revision: 0.0 ``` #### System type & name ``` shell-session $ sudo dmidecode -t system # dmidecode 3.3 Getting SMBIOS data from sysfs. SMBIOS 2.8 present. Handle 0x0001, DMI type 1, 27 bytes System Information Manufacturer: LENOVO Product Name: 2325BU3 Version: ThinkPad X230 Serial Number: PK1HM8E UUID: ce136601-xxxx-xxxx-xxxx-xxxxxxxxxxxx Wake-up Type: Reserved SKU Number: Not Specified Family: ThinkPad X230 Handle 0x000B, DMI type 32, 11 bytes System Boot Information Status: No errors detected ``` ### Install: `flashrom` The primary tool for operating on your BIOS is called `flashrom`. The Debian package is also called by the same name and can be installed as: apt-get install flashrom If the kernel is booted correctly with `iomem=relaxed`, you can run `flashrom`: flashrom -pinternal Ouput: ``` shell-session $ sudo flashrom -pinternal flashrom v1.2 on Linux 5.10.9-gnu (x86_64) flashrom is free software, get the source code at https://flashrom.org Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns). coreboot table found at 0xbff51000. Found chipset "Intel QM77". Enabling flash write... SPI Configuration is locked down. Enabling hardware sequencing due to multiple flash chips detected. OK. Found Programmer flash chip "Opaque flash chip" (12288 kB, Programmer-specific) mapped at physical address 0x0000000000000000. No operations were specified. ``` !!! tip Sometimes `flashrom` will not detect the internal flash chip, though it might very well be able to confirm the BIOS type and machine name. In such cases, you can try to run `flashrom` as: `flashrom -pinternal:laptop=force_I_want_a_brick`. This is not completely safe ### Read BIOS Image You can dump the BIOS to a file: ``` console $ flashrom -pinternal -r lc230-coreboot.rom ``` This will read the BIOS to a file: `lc230-coreboot.rom`. This file will be 12 MB in size. ``` console $ sudo flashrom -pinternal -r lc230.rom flashrom v1.2 on Linux 5.10.9-gnu (x86_64) flashrom is free software, get the source code at https://flashrom.org Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns). coreboot table found at 0xbff51000. Found chipset "Intel QM77". Enabling flash write... SPI Configuration is locked down. Enabling hardware sequencing due to multiple flash chips detected. OK. Found Programmer flash chip "Opaque flash chip" (12288 kB, Programmer-specific) mapped at physical address 0x0000000000000000. Reading flash... done. $ ls -lh lc230-coreboot.rom -rw-r--r-- 1 root root 12M Feb 8 04:46 lc230-coreboot.rom ``` ### Write BIOS Image You can now write back to the BIOS chips as follows: ``` console $ sudo flashrom -pinternal -w lc230-coreboot.rom flashrom v1.2 on Linux 5.10.9-gnu (x86_64) flashrom is free software, get the source code at https://flashrom.org Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns). coreboot table found at 0xbff51000. Found chipset "Intel QM77". Enabling flash write... SPI Configuration is locked down. Enabling hardware sequencing due to multiple flash chips detected. OK. Found Programmer flash chip "Opaque flash chip" (12288 kB, Programmer-specific) mapped at physical address 0x0000000000000000. Reading old flash chip contents... done. Erasing and writing flash chip... Warning: Chip content is identical to the requested image. Erase/write done ``` ### Flash: Skulls The Skulls Coreboot distribution provides built in scripts to upgrade the BIOS. The update procedure is [detailed here](https://github.com/merge/skulls/blob/master/x230/README.md#updating). Your LC230 ships with the latest release of Skull available at the time of shipping the laptop to you. You can upgrade skulls using the instructions above. ### Flash: Heads If you want to experiment with the [Heads firmware](https://osresearch.net/), instructions are available on the [Heads website](https://osresearch.net/) as well as in the [Skulls documentation](https://github.com/merge/skulls/blob/master/x230/README.md#moving-to-heads). ## Configuring Coreboot Your LC230 ships with a SeaBIOS payload called `nvramcui` that allows you to configure coreboot behaviour and save the settings to nvram.
nvramcui options (1)
nvramcui options (2)
nvramcui options (3)
### Swapping ++fn++ and ++control++ The `fn_ctrl_swap` on the 2nd page of the `nvramcui` settings page enables you to toggle the ++fn++ and ++control++ swap. If you like to have the control key on the bottom left corner of the keyboard, then you can set this option to `Enable`. ### Increasing Graphics Memory The x230 GPU does not have dedication RAM. Instead it shares its memory with the main system memory. You can configure how much RAM is dedicated to the GPU via the `gfx_uma_size` option on the 3rd page of the `nvramcui` settings. Pressing the ++left++ and ++right++ arrow keys you can iterate over all the available settings for this option. ### Other settings You can also configure the following behaviour via nvramcui: * **Always On USB**: By enabling this option, you can configure the USB ports to be *always on* - even when the laptop is suspended. * **Enable/Disable Trackpoing, Touchpad**: You can toggle the `touchpad` and `trackpoint` options to enable or disable the the touchpad and trackpoint respectively.