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devices:asus_kcma-d8

Information

  • ASUS KCMA-D8 Motherboard

Resources

Manual

Coreboot

Issues

  • When booting Ubuntu 18.10+, there's a gfx error; type help and press Enter to boot 1)
  • Jumpers seem to act slightly different with Coreboot 2)
  • Windows 10's installer can't start 3)
  • For unknown reasons, some builds of Coreboot from master have unreliable POST; using the release tar of 4.9 works fine though, and from master, 2019/07/06 is the last known-good version too
  • TianoCore payload compiles, but didn't boot as of 2019/07/17 4)

RAM

Incompatible

Compatible

  • Nanya NT2GC64B88B0NF-CG 8)
  • Micron 16JTF25664AZ-1G4F1 9)
  • Samsung M378B5273CH0-CK0 10)

Dependencies

  • :!: Coreboot cannot currently be compiled on distros with GNAT 9.0 or higher, including openSUSE TW and Fedora 30
  • Creating a quick Ubuntu 18.04 server install in a VM works fine

Ubuntu Server

sudo apt-get install -y bison build-essential curl flex git gnat libncurses5-dev m4 zlib1g-dev python-minimal

TianoCore

uuid-dev nasm

Download Source

cd ~ && mkdir -p ~/'Projects' && rm -Rf ~/'Projects/coreboot/src' && sync && git clone --branch 'master' --depth '1' --recurse-submodules 'https://review.coreboot.org/coreboot.git' ~/'Projects/coreboot/src' && sync

Build Toolchain

cd ~/'Projects/coreboot/src' && make 'crossgcc-clean' && make 'crossgcc-i386' CPUS='16'

Settings

  • :!: Use CMOS for configuration values speeds up boot significantly
  • :!: Including CPU microcode caused Linux to kernel panic on 2019/04/16
  • :!: For some unknown reason, POST randomly fails at times depending on when Coreboot is built, regardless of what config settings are used
  • Last updated: 2019/05/22
  • Mainboard vendor: ASUS
  • Mainboard model: KCMA-D8
  • ROM chip size: 2048 KB (2MB)
  • System Power State after Failure: S5 Soft Off
  • Local version string: Nightwane
  • [*] Use CMOS for configuration values
  • [*] Load default configuration values into CMOS on each boot
  • [ ] Compress ramstage with LZMA
  • [ ] Include the coreboot .config file into the ROM image
  • [ ] Create a table of timestamps collected during boot
  • Include CPU microcode in CBFS: Do not include microcode updates
  • [*] Enable high speed SPI clock
  • [ ] Serial port on SuperIO
  • [ ] Support Intel PCI-e WiFi adapters
  • [ ] Send console output to a CBMEM buffer
  • Default console log level: 0: EMERG
  • [*] Don't show any POST codes
  • SeaBIOS version: master
  • [*] Hardware init during option ROM execution
  • SeaBIOS debug level (verbosity): 0
cd ~/'Projects/coreboot/src' && make 'distclean' && make 'nconfig' && sync

Query

  • Presents config options that are changed from defaults
  • Last updated: 2019/05/22
cd ~/'Projects/coreboot/src' && make 'savedefconfig' && gio open ~/'Projects/coreboot/src/defconfig'
CONFIG_LOCALVERSION="Nightwane"
CONFIG_USE_OPTION_TABLE=y
CONFIG_STATIC_OPTION_TABLE=y
# CONFIG_COMPRESS_RAMSTAGE is not set
# CONFIG_INCLUDE_CONFIG_FILE is not set
# CONFIG_COLLECT_TIMESTAMPS is not set
CONFIG_VENDOR_ASUS=y
CONFIG_BOARD_ASUS_KCMA_D8=y
# CONFIG_DRIVERS_UART_8250IO is not set
CONFIG_POWER_STATE_OFF_AFTER_FAILURE=y
# CONFIG_CONSOLE_CBMEM is not set
CONFIG_CPU_MICROCODE_CBFS_NONE=y
CONFIG_SOUTHBRIDGE_AMD_SB700_33MHZ_SPI=y
# CONFIG_DRIVERS_INTEL_WIFI is not set
CONFIG_DEFAULT_CONSOLE_LOGLEVEL_0=y
CONFIG_NO_POST=y
CONFIG_SEABIOS_MASTER=y
CONFIG_SEABIOS_THREAD_OPTIONROMS=y
CONFIG_SEABIOS_DEBUG_LEVEL=0

CMOS Settings

  • Last updated: 2019/05/23
nano ~/'Projects/coreboot/src/src/mainboard/asus/kcma-d8/cmos.default'
l3_cache_partitioning=Enable
experimental_memory_speed_boost=Enable

Make

cd ~/'Projects/coreboot/src' && make clean && make && sync

Finalize

mkdir -p ~/'coreboot-bin' && mv ~/'Projects/coreboot/src/build/coreboot.rom' ~/'coreboot-bin/KCMAD8-coreboot-'$(date +%Y-%m-%d)'.rom' && sync

Virtual Machine

  • :!: Change X to the VM instance's IP address
scp 192.168.122.X:~/coreboot-bin/*.rom ~/Downloads

Flash

  • :!: Add internal:amd_imc_force=yes after the --programmer flag if flashing from ASUS proprietary BIOS 11) 12) 13)
sync && sudo flashrom --programmer 'internal' --write ~/'Downloads/KCMAD8-coreboot-'*'.rom'

Fan Control

  • If OpenBMC is figured out, this may be superseded
  • :!: Answer yes to all sensors-detect prompts and reboot for fancontrol to run
sudo dnf install 'lm_sensors' && sudo sensors-detect && sudo -e '/etc/fancontrol' && sudo systemctl enable 'fancontrol'
INTERVAL=10
DEVNAME=/sys/class/hwmon/hwmon6=w83795g

FCTEMPS=/sys/class/hwmon/hwmon6/device/pwm2=/sys/class/hwmon/hwmon6/device/temp8_input
FCFANS=/sys/class/hwmon/hwmon6/device/fan1_input+/sys/class/hwmon/hwmon6/device/fan2_input

MINTEMP=/sys/class/hwmon/hwmon6/device/pwm2=50
MAXTEMP=/sys/class/hwmon/hwmon6/device/pwm2=60

MINSTART=/sys/class/hwmon/hwmon6/device/pwm2=4000
MINSTOP=/sys/class/hwmon/hwmon6/device/pwm2=0
1)
this can be avoided by using an external GPU and disabling the generated VBIOS option for SeaBIOS, but otherwise this isn't a big issue
2)
can't disable individual Ethernet ports and it's all or nothing; ASpeed GPU only needs top jumper moved to enable while the second jumper can stay on disabled
3)
ACPI_BIOS_ERROR BSoD; requires disabling the generated VBIOS option for SeaBIOS to get to that point or otherwise the installer hangs after loading files
4)
I think because of it needing onboard/native graphics? SeaBIOS with the same build of CB works fine
5)
incompatible with Coreboot 2019/01/16, untested with Libreboot, untested with ASUS Vendor BIOS
6)
incompatible with Coreboot 2019/01/16, compatible with Libreboot 20160907, compatible with ASUS Vendor BIOS 3303
8) , 9)
compatible with Coreboot 2019/01/17, incompatible with Libreboot 20160907, compatible with ASUS Vendor BIOS 3303
10)
compatible with Coreboot 2019/01/19, untested with Libreboot, compatible with ASUS Vendor BIOS 3303
11)
expect to see an IMC-related error after the flash; this prevents verifying the flash chip contents, but as long as it flashes correctly this isn't an issue
12)
this IMC flag isn't necessary once Coreboot or Libreboot is flashed and booted from
13)
there's more prerequisites to use that flag; may need iomem=relaxed and a kernel older than 5.0
devices/asus_kcma-d8.txt · Last modified: 2019/10/18 09:33 by Sean Rhone