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--- hardware:t440p [2023/04/16 16:51] – created - external edit 127.0.0.1
+++ hardware:t440p [2024/02/20 14:18] (current) – thum
@@ Line 1: / Line 1: @@
-======= T440p =======
+======= Thinkpad T440p =======
-The Thinkpad T440p is a classic business laptop made by Lenovo beginning in 2013.
+The Thinkpad T440p is a classic business laptop made by Lenovo starting in 2013.
-It's the latest and fastest Thinkpad model (Intel Haswell) where coreboot boot firmware can be used and Intel ME can be neutralized. Later laptops have signed firmware where this has become impossible. Therefor, this is a recommendation if you need the latest libre-friendly laptop available.
+It's the latest and fastest Thinkpad model (Intel Haswell) where coreboot boot firmware can be used and Intel ME can be neutralized. Later laptops have signed firmware where this has become impossible. **The T440p is a strong recommendation** if you need the latest IME-cleaned, coreboot laptop available.
 ====== General information ======
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 Using Nvidia Optimus, graphic card being used is dynamically switching from HD4600 to Nvidia GT730M depending on the load. Heatsink part number 00HM903 is used.
-The Nvidia GT730M has not been tested at Vikings. This has been an odd choice from Lenovo, since it will perform very similar or even worse than the integrated GPU we simply disregard it and use the integrated CPU.
+The Nvidia GT730M has not been tested at Vikings. This has been an odd choice from Lenovo, since it will perform very similar or even worse than the integrated GPU. We simply disregard it and use the integrated CPU.
 ===== T440p recommended upgrades =====
@@ Line 43: / Line 43: @@
 === N140HCG-GQ2 IPS display recommended ===
-While all displays from the list above have been tested and found to be working well, the most recommended display is the N140HCG-GQ2. It has superior brightness and image quality and uses only little power. It has been released comparatively recently (2019), can be considered very modern and at the time of writing it is still in production. At Vikings we **love** this display and that's what we use for orders containing the IPS Panel option.
+While all displays from the list above have been tested and found to be working well, **the most recommended display is the N140HCG-GQ2**. It has superior brightness and image quality and uses the least power of all available options. It was published relatively recently (2019) and can therefore be considered modern. At Vikings we **love** this display and that's why we use for our customers that order the IPS panel option.
 == Panel brackets ==
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 ==== To do: Intel Core i7-4800MQ ====
+===== CPU Benchmarks =====
+==== Timed Linux Kernel Compilation 6.1 ====
+pts/build-linux-kernel-1.15.0 [Build: defconfig]
+Intel Core i7-4940MX: 388 (note: stock HSF)
+===== Notes on fan control and acpi =====
+The kernel module thinkpad_acpi is unable to autodetect a T440p that runs coreboot instead of the vendor BIOS. The module needs to be forced to load. Add a .conf file to /etc/modprobe.d/ containing:
+  options thinkpad_acpi force_load=1
+In order to use a software fan control mechanism, hwmon and lm-sensors needs to be used (/proc/acpi/ibm/thermal won't work on the T440p).
+Install lm-sensors
+run sensors-detect with root privileges (answering each question with the default (just hit ENTER) should work)
+Check /sys/devices/platform/coretemp.0/hwmon/hwmonX/ for the temperatures you want to use (check the temp*_label to identify the sensor and temp*_input to get the temperature)
+Add hwmon /sys/devices/platform/coretemp.0/hwmon/hwmonX/temp*_input to the thinkfan.conf just above the level settings
 ======= EC firmware ======
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 ====== Third-party batteries ======
-There does not seem to be a battery vendor lock-in on the T440p, even with the newest Lenovo firwmare (package GLUJ43US). There are some 3rd party batteries that won't charge for unknown reasons. However, batteries sold at Vikings have been tested and work as expected.
+There does not seem to be a battery vendor lock-in on the T440p, even with the newest Lenovo firwmare (at the time of writing this is "GLUJ43US"). There are some 3rd party batteries that won't charge for unknown reasons. However, [[https://shop.vikings.net/product-category/accessories/t440p-parts-accessories/|batteries sold at Vikings]] have been tested thoroughly and work as expected.
 ====== GNU/Linux related information ======
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 ===== Powersave considerations / using TLP =====
-TLP is currently one of the best powersaving utilities avaiable on GNU/Linux operating systems. It performs many functions of similar tools (e.g. the popular powertop), without having the user worry about performing them manually.
+TLP is currently one of the best powersaving utilities available for GNU/Linux operating systems. It performs many functions of similar tools (e.g. the popular powertop), without having the user worry about performing them manually.
 ==== Install TLP using your Linux distibution's package manager ====