Lenovo ThinkPad T25

This article or section does not follow the
Laptop page guidelines
.
Reason:
Hardware table needs IDs and a function keys section should be added (Discuss in
Talk:Lenovo ThinkPad T25
)
This article or section is a candidate for merging with
Lenovo ThinkPad T470
.
Notes:
The page for the
Lenovo ThinkPad T470
has more content and was updated more regularly than this one. (Discuss in
Talk:Lenovo ThinkPad T25
)
Hardware
PCI/USB ID
Working?
GPU (Intel)
Yes
GPU (Nvidia)
Yes
Wireless
Yes
Bluetooth
Yes
Mobile broadband
Yes
Webcam
Yes
IR Camera
Yes
TrackPoint
Yes
Touchpad
Yes
Touchscreen
Yes
Fingerprint Reader
No
This article covers the installation and configuration of Arch Linux on a Lenovo T25 Anniversary Edition laptop. It is based on the Lenovo T470 laptop so most of the hardware is identical and therefore should work like the T470.
For a general overview of laptop-related articles and recommendations, see
Laptop
.
Firmware (e.g. bios and peripherals)
As of writing, the current BIOS version is 1.54. By visiting the downloads section (T25) an ISO can be downloaded and burned to disk which will perform the update
from Lenovo
. Or
extracted and copied on a USB Stick
.
Kernel and hardware support
Hardware video acceleration
with Kaby Lake seems to work fine via va-api.
As noted in
Intel graphics
, the
xf86-video-intel
driver seems to cause more issue than the builtin
modesetting
Xorg driver.
Works fine without the intel driver (on a Skylake configuration).
138a:0097 will hopefully be supported as part of
Validity90
.
Since the hardware is the same as in the T470 model, the
fingerprint reader guide
probably will work.
Screen backlight
With the
intel
driver (
xf86-video-intel
the
xbacklight
brightness control is not working.
It is possible that, with the good
acpi_*
kernel parameters, the backlight related keys do their job.
Other workaround exists, such as described
on this post
or in the wiki
acpid#Enabling backlight control
.
Using the
acpilight
AUR
package as a
xbacklight
replacement works well.
You can also check
this repository
as a base to add the ACPI rules to call
xbacklight
when backlight keys are pressed.
Note
The
acpilight
AUR
package is known to allow controlling the ThinkPad keyboard backlight. Similar ACPI rules should allow to toggle it when the keyboard backlight key is pressed.
UEFI boot
After configuring the BIOS setup to allow UEFI boot (either
UEFI only
or
both
), it works flawlessly.
Special buttons
See
Laptop/Lenovo#Special buttons
, an additional key has to be added for this model:
Key combination
Scancode
Keycode
Fn+Space
0x13
372
KEY_ZOOM
Touchpad and trackpoint
Touchpad and trackpoint share bandwidth, so using them at the same time makes trackpoint slow, jumpy, and abrupt. Disabling the touchpad either in BIOS or via xinput does not fix the problem, so the trackpoint becomes unusable each time the touchpad is occasionally touched.
The touchpad is also accessible over secondary bus (SMBUS/RMI), allowing to leave the full bandwidth for the trackpoint. The kernel source code contains the whitelist of supported devices, which does not include LEN008e (T25 touchpad). You can enforce this feature setting
synaptics_intertouch
parameter of
psmouse
module to
1
. For instance, using the
kernel command line
:
psmouse.synaptics_intertouch=1
.
See also
Lenovo Support Page