Differences

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--- hardware:t440p [2023/08/15 21:08] – [Intel HD 4600 Graphics + NVidia GT730M] thum
+++ hardware:t440p [2025/02/01 23:48] (current) – [Synaptics trackpad recommended] wording thum
@@ Line 1: / Line 1: @@
-======= T440p =======
+======= Thinkpad T440p =======
 The Thinkpad T440p is a classic business laptop made by Lenovo starting in 2013.
@@ 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 the least power of all available options. It has been released comparatively recently (2019), so it can be considered 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 our customers that order 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 <del>and that's why we use for our customers that order the IPS panel option</del> (sold out as of Oct 2024, beware of fakes on ebay, aliexpress etc.)
 == Panel brackets ==
@@ Line 53: / Line 53: @@
 ==== Synaptics trackpad recommended ====
-T440p laptops come with trackpads from the factory that are, in our opinion, unusable for productive work.
+T440p laptops come with trackpads that are, in our opinion, unusable for productive work.
-Synaptics touchpads are available in the Vikings store. This replaces the T440p's vendor touchpad and significantly improves the T440p's usability and your workflow.
+Synaptics touchpads are available from the #vikings shop. This replaces the T440p's original touchpad and significantly improves the T440p's usability.
 ===== CPUs and CPU considerations =====
@@ Line 95: / Line 95: @@
 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 ====