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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<style type="text/css">
@import url('../css/main.css');
</style>
<title>ThinkPad T500</title>
</head>
<body>
<div class="section">
<h1 id="pagetop">ThinkPad T500</h1>
<p>
It is believed that all or most T500 laptops are compatible.
See notes about <a href="../install/t500_external.html#cpu_compatibility">CPU compatibility</a>
for potential incompatibilities.
</p>
<p>
There are two possible flash chip sizes for the T500: 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.
</p>
<p>
<b>The T500 laptops come with the ME (and sometimes AMT in addition) before flashing libreboot. Libreboot disables and removes it
by using a modified descriptor: see <a href="gm45_remove_me.html">gm45_remove_me.html</a></b> (contains notes, plus
instructions)
</p>
<p>
Flashing instructions can be found at <a href="../install/index.html#flashrom">../install/index.html#flashrom</a>
</p>
<p>
<a href="index.html">Back to previous index</a>.
</p>
</div>
<div class="section">
<h2 id="compatibility_noblobs">Compatibility (without blobs)</h2>
<div class="subsection">
<h3 id="hwvirt">Hardware virtualization (vt-x)</h3>
<p>
The T500, 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).
</p>
<p>
On GM45 hardware (with libreboot), make sure that the <i>kvm</i> and <i>kvm_intel</i> kernel modules
are not loaded, when using QEMU.
</p>
<p>
The following errata datasheet from Intel might help with investigation:
<a href="http://download.intel.com/design/mobile/specupdt/320121.pdf">http://download.intel.com/design/mobile/specupdt/320121.pdf</a>
</p>
</div>
</div>
<div class="section">
<p>
The T500 is almost identical to the X200, code-wise. See <a href="x200.html">x200.html</a>.
</p>
</div>
<div class="section">
<h2 id="descriptor_difference">
Descriptor and Gbe differences
</h2>
<p>
See
<a href="../future/dumps/t500_x200_descriptor/descriptor_diff_t500_x200.txt">../future/dumps/t500_x200_descriptor/descriptor_diff_t500_x200.txt</a>
and
<a href="../future/dumps/t500_x200_descriptor/gbe_diff_t500_x200.txt">../future/dumps/t500_x200_descriptor/gbe_diff_t500_x200.txt</a>
</p>
<p>
The patches above are based on the output from ich9deblob on a factory.rom image dumped from the T500
with a SOIC-8 4MiB flash chip. The patch re-creates the X200 descriptor/gbe source, so the commands were
something like:<br/>
$ <b>diff -u t500gbe x200gbe</b><br/>
$ <b>diff -u t500descriptor x200descriptor</b>
</p>
<p>
ME VSCC table is in a different place and a different size on the T500. Libreboot disables and removes the ME
anyway, so it doesn't matter.
</p>
<p>
The very same descriptor/gbe used on the X200 (generated by <a href="gm45_remove_me.html#ich9gen">ich9gen</a>)
was re-used on the T500, and it still worked.
</p>
</div>
<div class="section">
<h2 id="regdumps">Hardware register dumps</h2>
<p>
The coreboot wiki <a href="http://www.coreboot.org/Motherboard_Porting_Guide">shows</a>
how to collect various logs useful in porting to new
boards. Following are outputs from the T500:
</p>
<ul>
<li>
T500 with <b>Macronix MX25L3205D</b> flash chip (4MiB, SOIC-8)
and Lenovo BIOS 3.13 7VET83WW (EC firmware 1.06):
<ul>
<li>lspci <a href="../future/dumps/t500log/lspci.log">output</a></li>
<li>lsusb <a href="../future/dumps/t500log/lsusb.log">output</a></li>
<li>lspnp <a href="../future/dumps/t500log/lspnp.log">output</a></li>
<li>superiotool <a href="../future/dumps/t500log/superiotool.log">output</a></li>
<li>inteltool <a href="../future/dumps/t500log/inteltool.log">output</a></li>
<li>ectool <a href="../future/dumps/t500log/ectool.log">output</a></li>
<li>msrtool <a href="../future/dumps/t500log/msrtool.log">output</a></li>
<li>dmidecode <a href="../future/dumps/t500log/dmidecode.log">output</a></li>
<li>biosdecode <a href="../future/dumps/t500log/biosdecode.log">output</a></li>
<li>nvramtool <a href="../future/dumps/t500log/nvramtool.log">output</a></li>
<li><a href="../future/dumps/t500log/dmesg.log">dmesg</a></li>
<li>from stock firmware - flashrom probe <a href="../future/dumps/t500log/flashrom_info.log">output</a>,
<li>from stock firmware - flashrom read (failed): <a href="../future/dumps/t500log/flashrom_read.log">output</a>,
<li>from stock firmware - flashrom write (failed): <a href="../future/dumps/t500log/flashrom_write.log">flashrom_write.log</a></li>
<li><a href="../future/dumps/t500log/pin_hwC0D0">/sys/class/sound/card0/hwC0D0/init_pin_configs</a></li>
<li><a href="../future/dumps/t500log/codec%230">/proc/asound/card0/codec#0</a></li>
<li><a href="../future/dumps/t500log/cpuinfo.log">/proc/cpuinfo</a></li>
</ul>
</li>
</ul>
<p>
This one had a screen (1920x1200) that is currently incompatible. Working to fix it. EDID:
</p>
<pre>
user@user-ThinkPad-T500:~/Desktop$ sudo i2cdump -y 2 0x50
No size specified (using byte-data access)
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: XX ff ff ff ff ff ff 00 30 ae 55 40 00 00 00 00 X.......0?U@....
10: 00 11 01 03 80 21 15 78 ea ba 70 98 59 52 8c 28 .????!?x??p?YR?(
20: 25 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01 %PT...??????????
30: 01 01 01 01 01 01 e7 3a 80 8c 70 b0 14 40 1e 50 ???????:??p??@?P
40: 24 00 4b cf 10 00 00 19 16 31 80 8c 70 b0 14 40 $.K??..??1??p??@
50: 1e 50 24 00 4b cf 10 00 00 19 00 00 00 0f 00 d1 ?P$.K??..?...?.?
60: 0a 32 d1 0a 28 11 01 00 32 0c 00 00 00 00 00 fe ?2??(??.2?.....?
70: 00 4c 50 31 35 34 57 55 31 2d 54 4c 42 31 00 9a .LP154WU1-TLB1.?
80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
90: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
</pre>
<p>
What happens: backlight turns on at boot, then turns off. At no point is there
a working visual display.
</p>
<p>
Another incompatible screen (EDID) 1680 x 1050 with the same issue:
</p>
<pre>
EDID:
00 ff ff ff ff ff ff 00 30 ae 53 40 00 00 00 00
00 11 01 03 80 21 15 78 ea cd 75 91 55 4f 8b 26
21 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01
01 01 01 01 01 01 a8 2f 90 e0 60 1a 10 40 20 40
13 00 4b cf 10 00 00 19 b7 27 90 e0 60 1a 10 40
20 40 13 00 4b cf 10 00 00 19 00 00 00 0f 00 b3
0a 32 b3 0a 28 14 01 00 4c a3 50 33 00 00 00 fe
00 4c 54 4e 31 35 34 50 33 2d 4c 30 32 0a 00 7e
Extracted contents:
header: 00 ff ff ff ff ff ff 00
serial number: 30 ae 53 40 00 00 00 00 00 11
version: 01 03
basic params: 80 21 15 78 ea
chroma info: cd 75 91 55 4f 8b 26 21 50 54
established: 00 00 00
standard: 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01
descriptor 1: a8 2f 90 e0 60 1a 10 40 20 40 13 00 4b cf 10 00 00 19
descriptor 2: b7 27 90 e0 60 1a 10 40 20 40 13 00 4b cf 10 00 00 19
descriptor 3: 00 00 00 0f 00 b3 0a 32 b3 0a 28 14 01 00 4c a3 50 33
descriptor 4: 00 00 00 fe 00 4c 54 4e 31 35 34 50 33 2d 4c 30 32 0a
extensions: 00
checksum: 7e
Manufacturer: LEN Model 4053 Serial Number 0
Made week 0 of 2007
EDID version: 1.3
Digital display
Maximum image size: 33 cm x 21 cm
Gamma: 220%
Check DPMS levels
DPMS levels: Standby Suspend Off
Supported color formats: RGB 4:4:4, YCrCb 4:2:2
First detailed timing is preferred timing
Established timings supported:
Standard timings supported:
Detailed timings
Hex of detail: a82f90e0601a1040204013004bcf10000019
Did detailed timing
Detailed mode (IN HEX): Clock 122000 KHz, 14b mm x cf mm
0690 06b0 06f0 0770 hborder 0
041a 041b 041e 042a vborder 0
-hsync -vsync
Hex of detail: b72790e0601a1040204013004bcf10000019
Detailed mode (IN HEX): Clock 122000 KHz, 14b mm x cf mm
0690 06b0 06f0 0770 hborder 0
041a 041b 041e 042a vborder 0
-hsync -vsync
Hex of detail: 0000000f00b30a32b30a281401004ca35033
Manufacturer-specified data, tag 15
Hex of detail: 000000fe004c544e31353450332d4c30320a
ASCII string: LTN154P3-L02
Checksum
Checksum: 0x7e (valid)
WARNING: EDID block does NOT fully conform to EDID 1.3.
Missing name descriptor
Missing monitor ranges
bringing up panel at resolution 1680 x 1050
Borders 0 x 0
Blank 224 x 16
Sync 64 x 3
Front porch 32 x 1
Spread spectrum clock
Single channel
Polarities 1, 1
Data M1=2132104, N1=8388608
Link frequency 270000 kHz
Link M1=236900, N1=524288
Pixel N=9, M1=24, M2=8, P1=1
Pixel clock 243809 kHz
waiting for panel powerup
panel powered up
</pre>
<p>
For comparison, here is a working display (T400 screen, but was
connected to a T500. Some T500 displays also work, but no EDID
available on this page yet):
</p>
<pre>
EDID:
00 ff ff ff ff ff ff 00 30 ae 31 40 00 00 00 00
00 12 01 03 80 1e 13 78 ea b3 85 95 58 53 8a 28
25 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01
01 01 01 01 01 01 26 1b 00 7d 50 20 16 30 30 20
36 00 30 be 10 00 00 18 8b 16 00 7d 50 20 16 30
30 20 36 00 30 be 10 00 00 18 00 00 00 0f 00 81
0a 32 81 0a 28 14 01 00 30 e4 28 01 00 00 00 fe
00 4c 50 31 34 31 57 58 33 2d 54 4c 52 31 00 d8
Extracted contents:
header: 00 ff ff ff ff ff ff 00
serial number: 30 ae 31 40 00 00 00 00 00 12
version: 01 03
basic params: 80 1e 13 78 ea
chroma info: b3 85 95 58 53 8a 28 25 50 54
established: 00 00 00
standard: 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01
descriptor 1: 26 1b 00 7d 50 20 16 30 30 20 36 00 30 be 10 00 00 18
descriptor 2: 8b 16 00 7d 50 20 16 30 30 20 36 00 30 be 10 00 00 18
descriptor 3: 00 00 00 0f 00 81 0a 32 81 0a 28 14 01 00 30 e4 28 01
descriptor 4: 00 00 00 fe 00 4c 50 31 34 31 57 58 33 2d 54 4c 52 31
extensions: 00
checksum: d8
Manufacturer: LEN Model 4031 Serial Number 0
Made week 0 of 2008
EDID version: 1.3
Digital display
Maximum image size: 30 cm x 19 cm
Gamma: 220%
Check DPMS levels
DPMS levels: Standby Suspend Off
Supported color formats: RGB 4:4:4, YCrCb 4:2:2
First detailed timing is preferred timing
Established timings supported:
Standard timings supported:
Detailed timings
Hex of detail: 261b007d502016303020360030be10000018
Did detailed timing
Detailed mode (IN HEX): Clock 69500 KHz, 130 mm x be mm
0500 0530 0550 057d hborder 0
0320 0323 0329 0336 vborder 0
-hsync -vsync
Hex of detail: 8b16007d502016303020360030be10000018
Detailed mode (IN HEX): Clock 69500 KHz, 130 mm x be mm
0500 0530 0550 057d hborder 0
0320 0323 0329 0336 vborder 0
-hsync -vsync
Hex of detail: 0000000f00810a32810a2814010030e42801
Manufacturer-specified data, tag 15
Hex of detail: 000000fe004c503134315758332d544c5231
ASCII string: LP141WX3-TLR1
Checksum
Checksum: 0xd8 (valid)
WARNING: EDID block does NOT fully conform to EDID 1.3.
Missing name descriptor
Missing monitor ranges
bringing up panel at resolution 1280 x 800
Borders 0 x 0
Blank 125 x 22
Sync 32 x 6
Front porch 48 x 3
Spread spectrum clock
Single channel
Polarities 1, 1
Data M1=1214600, N1=8388608
Link frequency 270000 kHz
Link M1=134955, N1=524288
Pixel N=10, M1=14, M2=11, P1=1
Pixel clock 138857 kHz
waiting for panel powerup
panel powered up
</pre>
</div>
<div class="section">
<p>
Copyright © 2015 Francis Rowe <info@gluglug.org.uk><br/>
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 <a href="../gfdl-1.3.txt">../gfdl-1.3.txt</a>
</p>
<p>
Updated versions of the license (when available) can be found at
<a href="https://www.gnu.org/licenses/licenses.html">https://www.gnu.org/licenses/licenses.html</a>
</p>
<p>
UNLESS OTHERWISE SEPARATELY UNDERTAKEN BY THE LICENSOR, TO THE
EXTENT POSSIBLE, THE LICENSOR OFFERS THE LICENSED MATERIAL AS-IS
AND AS-AVAILABLE, AND MAKES NO REPRESENTATIONS OR WARRANTIES OF
ANY KIND CONCERNING THE LICENSED MATERIAL, WHETHER EXPRESS,
IMPLIED, STATUTORY, OR OTHER. THIS INCLUDES, WITHOUT LIMITATION,
WARRANTIES OF TITLE, MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE, NON-INFRINGEMENT, ABSENCE OF LATENT OR OTHER DEFECTS,
ACCURACY, OR THE PRESENCE OR ABSENCE OF ERRORS, WHETHER OR NOT
KNOWN OR DISCOVERABLE. WHERE DISCLAIMERS OF WARRANTIES ARE NOT
ALLOWED IN FULL OR IN PART, THIS DISCLAIMER MAY NOT APPLY TO YOU.
</p>
<p>
TO THE EXTENT POSSIBLE, IN NO EVENT WILL THE LICENSOR BE LIABLE
TO YOU ON ANY LEGAL THEORY (INCLUDING, WITHOUT LIMITATION,
NEGLIGENCE) OR OTHERWISE FOR ANY DIRECT, SPECIAL, INDIRECT,
INCIDENTAL, CONSEQUENTIAL, PUNITIVE, EXEMPLARY, OR OTHER LOSSES,
COSTS, EXPENSES, OR DAMAGES ARISING OUT OF THIS PUBLIC LICENSE OR
USE OF THE LICENSED MATERIAL, EVEN IF THE LICENSOR HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH LOSSES, COSTS, EXPENSES, OR
DAMAGES. WHERE A LIMITATION OF LIABILITY IS NOT ALLOWED IN FULL OR
IN PART, THIS LIMITATION MAY NOT APPLY TO YOU.
</p>
<p>
The disclaimer of warranties and limitation of liability provided
above shall be interpreted in a manner that, to the extent
possible, most closely approximates an absolute disclaimer and
waiver of all liability.
</p>
</div>
</body>
</html>
|
