Difference between revisions of "User:GNUtoo/X60 GPU init"

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=== Related historic git trees ===
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* http://git.stuge.se/?p=gnutoo-chromiumos-coreboot.git;a=summary : it's an historic tree, containing code that is based on the replay of the option rom, before the native GPU init worked(so it doesn't work).
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* http://git.stuge.se/?p=gnutoo-i915tool-x60.git;a=summary : contains an historic version of the i915tool

Revision as of 22:31, 17 January 2015

Native GPU init

With the native (intel) GPU initialisation, coreboot itself initialises the GPU.

Initialisation method Free software, based on Advantages Drawbacks
non-free VGA option rom No, extracted from the BIOS.
  • compatible with everything
  • works with the official coreboot.
  • non-free
  • even yabel cannot contain it
Linux kernel i915 driver Yes, in the linux kernel
  • works with the official coreboot.
  • The screen content is only visible after the i915, so you cannot see grub.
  • It worked with trisquel6 kernel, and had issues with some recent kernels.
    • TODO: investigate the memory_corruption_check kernel parameter.
Native GPU initialisation (by coreboot) Yes, based on a replay of the kernel initialisation
  • compatible payloads can use the screen.
  • not in the official coreboot yet.
  • only compatible payload will be able to use the screen, like:
    • libpayload based payloads
    • recent grub versions

Related historic git trees