Denis 'GNUtoo' Carikli
0e3ff8047f
The file adding the news is named gnuboot-december-2023.md instead of gnuboot-0.1-rc1.md as the later is understood as a translation in the '1-rc1' lang. Renaming the file to gnuboot-0.1-rc1.en.md instead makes untitled detect the lang correctly but then it assumes this is a translation and adds a broken link for "English" on the new page. For now the older Libreboot news were kept as this shows the history of the project and since GNU Boot is a continuation of the Libreboot project it makes sense to also keep them. The CSS also needed to be separated from the template because otherwise the generated news page would be incomplete and miss all what comes before the CSS like '<!DOCTYPE html>' for instance. Finally x-reviewed was changed into x-unreviewed because we can't set x-reviewed for the news, so the only way to remove the banner for the individual news is to default to reviewed (and to mark all unreviewed files as such). As for the Untitled patch it is needed to make the news page work. Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org> Acked-by: Adrien 'neox' Bourmault <neox@gnu.org>
2.4 KiB
title: ThinkPad R400 x-unreviewed: true ...
It is believed that all or most R400 laptops are compatible. See notes about CPU compatibility for potential incompatibilities.
There are two possible flash chip sizes for the R400: 4MiB (32Mbit) or 8MiB (64Mbit). This can be identified by the type of flash chip below the palmrest: 4MiB is SOIC-8, 8MiB is SOIC-16.
The R400 laptops come with the ME (and sometimes AMT in addition) before flashing libreboot. Libreboot disables and removes it by using a modified descriptor: see ../install/ich9utils.md (contains notes, plus instructions)
Flashing instructions can be found at ../install/#flashrom
EC update
It is recommended that you update to the latest EC firmware version. The EC firmware is separate from libreboot, so we don't actually provide that, but if you still have Lenovo BIOS then you can just run the Lenovo BIOS update utility, which will update both the BIOS and EC version. See:
NOTE: this can only be done when you are using Lenovo BIOS. How to update the EC firmware while running libreboot is unknown. Libreboot only replaces the BIOS firmware, not EC.
Updated EC firmware has several advantages e.g. bettery battery handling.
Compatibility (without blobs)
Hardware virtualization (vt-x)
The R400, when run without CPU microcode updates in coreboot, currently kernel panics if running QEMU with vt-x enabled on 2 cores for the guest. With a single core enabled for the guest, the guest panics (but the host is fine). Working around this in QEMU might be possible; if not, software virtualization should work fine (it's just slower).
On GM45 hardware (with libreboot), make sure that the kvm and kvm_intel kernel modules are not loaded, when using QEMU.
The following errata datasheet from Intel might help with investigation: http://download.intel.com/design/mobile/specupdt/320121.pdf
The R400 is almost identical to the X200, code-wise. See x200.md.
TODO: put hardware register logs here like on the X200 and T400 page.