hamgammon
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nonlibreboot


			
				
					
						
						
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	<title>ThinkPad T500</title>
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<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">

		<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 &copy; 2015 Francis Rowe &lt;info@gluglug.org.uk&gt;<br/>
			This document is released under the Creative Commons Attribution-ShareAlike 4.0 International Public License and all future versions.
			A copy of the license can be found at <a href="../cc-by-sa-4.txt">../cc-by-sa-4.txt</a>.
		</p>

		<p>
			This document is distributed in the hope that it will be useful,
			but WITHOUT ANY WARRANTY; without even the implied warranty of
			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See <a href="../cc-by-sa-4.txt">../cc-by-sa-4.txt</a> for more information.
		</p>
		
	</div>

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