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\input texinfo
@documentencoding UTF-8
@ifnottex
@paragraphindent 0
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@titlepage
@title ThinkPad X60 Tablet: Recovery guide
@end titlepage
@node Top
@top ThinkPad X60 Tablet: Recovery guide
@menu
* ThinkPad X60 Tablet Recovery guide::
* Brick type 1 bucts not reset::
* bad rom or user error system won't boot::
@end menu
@node ThinkPad X60 Tablet Recovery guide
@chapter ThinkPad X60 Tablet: Recovery guide
@anchor{#thinkpad-x60-tablet-recovery-guide}
This section documents how to recover from a bad flash that prevents your ThinkPad X60 Tablet from booting.
@uref{index.html,Back to previous index}
@menu
* Table of Contents::
@end menu
@node Table of Contents
@section Table of Contents
@anchor{#table-of-contents}
@itemize
@item
Types of brick:
@itemize
@item
@ref{#bucts_brick,Brick type 1: bucts not reset}
@item
@ref{#recovery,Brick type 2: bad rom (or user error), system won't boot}
@end itemize
@end itemize
@node Brick type 1 bucts not reset
@chapter Brick type 1: bucts not reset.
@anchor{#brick-type-1-bucts-not-reset.}
You still have Lenovo BIOS, or you had libreboot running and you flashed another ROM; and you had bucts 1 set and the ROM wasn't dd'd.* or if Lenovo BIOS was present and libreboot wasn't flashed.@*@* In this case, unbricking is easy: reset BUC.TS to 0 by removing that yellow cmos coin (it's a battery) and putting it back after a minute or two:@* @image{../resources/images/x60t_unbrick/0008,,,,JPG}@*@* *Those dd commands should be applied to all newly compiled X60 ROM images (the ROM images in libreboot binary archives already have this applied!):@* dd if=coreboot.rom of=top64k.bin bs=1 skip=$[$(stat -c %s coreboot.rom) - 0x10000] count=64k@* dd if=coreboot.rom bs=1 skip=$[$(stat -c %s coreboot.rom) - 0x20000] count=64k | hexdump@* dd if=top64k.bin of=coreboot.rom bs=1 seek=$[$(stat -c %s coreboot.rom) - 0x20000] count=64k conv=notrunc@* (doing this makes the ROM suitable for use when flashing a system that still has Lenovo BIOS running, using those instructions: @uref{http://www.coreboot.org/Board:lenovo/x60/Installation,http://www.coreboot.org/Board:lenovo/x60/Installation}.
@node bad rom or user error system won't boot
@chapter bad rom (or user error), system won't boot
@anchor{#bad-rom-or-user-error-system-wont-boot}
In this scenario, you compiled a ROM that had an incorrect configuration, or there is an actual bug preventing your system from booting. Or, maybe, you set BUC.TS to 0 and shut down after first flash while Lenovo BIOS was running. In any case, your system is bricked and will not boot at all.
"Unbricking" means flashing a known-good (working) ROM. The problem: you can't boot the system, making this difficult. In this situation, external hardware (see hardware requirements above) is needed which can flash the SPI chip (where libreboot resides).
@image{../resources/images/x60t_unbrick/0000,,,,JPG}
Remove those screws:@* @image{../resources/images/x60t_unbrick/0001,,,,JPG}
Remove the HDD:@* @image{../resources/images/x60t_unbrick/0002,,,,JPG}
Push keyboard forward to loosen it:@* @image{../resources/images/x60t_unbrick/0003,,,,JPG}
Lift:@* @image{../resources/images/x60t_unbrick/0004,,,,JPG}
Remove those:@* @image{../resources/images/x60t_unbrick/0005,,,,JPG}
@image{../resources/images/x60t_unbrick/0006,,,,JPG}
Also remove that (marked) and unroute the antenna cables:@* @image{../resources/images/x60t_unbrick/0007,,,,JPG}
For some X60T laptops, you have to unroute those too:@* @image{../resources/images/x60t_unbrick/0010,,,,JPG}
Remove the LCD extend board screws. Also remove those screws (see blue marks) and remove/unroute the cables and remove the metal plate:@* @image{../resources/images/x60t_unbrick/0008,,,,JPG}
Remove that screw and then remove the board:@* @image{../resources/images/x60t_unbrick/0009,,,,JPG}
Now wire up the BBB and the Pomona with your PSU.@* Refer to @uref{bbb_setup.html,bbb_setup.html} for how to setup the BBB for flashing.@* @strong{Note, the guide mentions a 3.3v DC PSU but you don't need this on the X60 Tablet: if you don't have or don't want to use an external PSU, then make sure not to connect the 3.3v leads mentioned in the guide; instead, connect the AC adapter (the one that normally charges your battery) so that the board has power (but don't boot it up)} @image{../resources/images/x60t_unbrick/0011,,,,JPG}@* Correlate the following with the BBB guide linked above:
@verbatim
POMONA 5250:
=== golden finger and wifi switch ====
18 - - 1
22 - - NC ---------- audio jacks are on this end
NC - - 21
3.3V (PSU) - - 17 - this is pin 1 on the flash chip
=== CPU fan ===
This is how you will connect. Numbers refer to pin numbers on the BBB, on the plugs near the DC jack.
@end verbatim
Connecting the BBB and pomona (in this image, an external 3.3v DC PSU was used):@* @image{../resources/images/x60/th_bbb_flashing,,,,jpg}
Flashrom binaries for ARM (tested on a BBB) are distributed in libreboot_util. Alternatively, libreboot also distributes flashrom source code which can be built.
SSH'd into the BBB:@* # @strong{./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 -w yourrom.rom}
It should be @strong{Verifying flash... VERIFIED} at the end. If flashrom complains about multiple flash chip definitions detected, then choose one of them following the instructions in the output.
Reverse the steps to re-assemble your system.
Copyright © 2014, 2015 Minifree Ltd <info@@minifree.org>@* Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license can be found at @uref{../resources/licenses/gfdl-1.3.txt,gfdl-1.3.txt}
Updated versions of the license (when available) can be found at @uref{https://www.gnu.org/licenses/licenses.html,https://www.gnu.org/licenses/licenses.html}
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@bye
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