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----
-title: ThinkPad R400 
-...
-
-It is believed that all or most R400 laptops are compatible. See notes
-about [CPU
-compatibility](../install/r400_external.html#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 [gm45\_remove\_me.html](gm45_remove_me.html)**
-(contains notes, plus instructions)
-
-Flashing instructions can be found at
-[../install/\#flashrom](../install/#flashrom)
-
-EC update {#ecupdate}
-=========
-
-It is recommended that you update to the latest EC firmware version. The
-[EC firmware](../../faq/#firmware-ec) 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:
-
--   [../install/index.html#flashrom](../install/index.html#flashrom)
--   <http://www.thinkwiki.org/wiki/BIOS_update_without_optical_disk>
-
-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) {#compatibility_noblobs}
------------------------------
-
-### Hardware virtualization (vt-x) {#hwvirt}
-
-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.html](x200.html).
-
-TODO: put hardware register logs here like on the [X200](x200.html) and
-[T400](t400.html) page.
-
-Copyright © 2014, 2015 Leah Rowe <info@minifree.org>\
-This page is available under the [CC BY SA 4.0](../cc-by-sa-4.0.txt)