lbwww/site/docs/release/libreboot20140309.md

1.6 KiB

% Libreboot 20140309 release % Leah Rowe % 9 March 2014

Revision notes (9th March 2014):

  • recreated coreboot config from scratch
  • GRUB loads even faster now (less than 2 seconds).
  • Total boot time reduced by further ~5 seconds.
  • Added crypto and cryptodisk modules to GRUB
  • cbfstool now included in the binary archives

Development notes

  • Binary archive now have 2 images:
    • With serial output enabled and memtest86+ included (debug level 8 in coreboot)
    • With serial output disabled and memtest86+ excluded (faster boot speeds) (debugging disabled)
  • Reduced impact on battery life:
    • 'processor.max_cstate=2' instead of 'idle=halt' for booting default kernel
  • coreboot.rom (faster boot speeds, debugging disabled):
    • Disabled coreboot serial output (Console-> in "make menuconfig")
    • Set coreboot debug level to 0 instead of 8 (Console-> in "make menuconfig")
    • Changed GRUB timeout to 1 second instead of 2 (in grub.cfg
    • Removed background image in GRUB.
    • Removed memtest86+ payload (since it relies on serial output)
  • coreboot_serial.rom (slower boot speeds, debugging enabled):
    • Boot time still reduced, but only by ~2 seconds
    • has the memtest86+ payload included in the ROM
    • has serial port enabled. How this is achieved (from X60_source): Turn on debugging level to 8, and enable serial output
  • (in Console-> in coreboot "make menuconfig")
  • (and build with grub_serial.cfg and grub_memdisk_serial.cfg)