ThinkWiki - User contributions [en]

Fix for suspend problems on T410s with touchscreen

2011-05-26T18:26:03Z

Kristine:

In {{Ubuntu}} (and a lot of other Linux distrubutions) the Lenovo {{T410s}} with a [[MultiTouch|touchscreen]] has the issue that it cannot go into suspend.

It is the kernel module hid_ntrig that seems to be causing the problem. Thus a work around this is to turn off the kernel module hid_ntrig by running the following command:
modprobe -r hid_ntrig

This will disable the touch screen, but now suspend works.

If you want to have both your touch screen and suspend, go to the folder: /etc/pm/sleep.d/. You should create a script file in this folder which will then be called when your laptops goes into and awakens from suspend. The script should contain the following code and remember to make the file executable:

#!/bin/sh

# Disable ntrig on suspend and enable it when awakening from suspend.
# Goal: Turn off touch screen which makes suspend not work on Lenovo ThinkPad T410

# pm-action(8) - <action> <suspend method>

case "${1}" in
suspend|hibernate)
modprobe -r hid_ntrig
;;
resume|thaw)
modprobe hid_ntrig &
;;
esac

When your laptop goes into suspend, the touch screen module will be disabled
modprobe -r hid_ntrig

and on awakening the module is enabled.
modprobe hid_ntrig &

I add the ampersand (&) at the end when enabling hid_ntrig, because this command is rather slow. By doing so the command in run in the background, and thus it will not make your computer stall on awakening, but it might take 10 seconds before you can use your touch screen.

This has been implemented in Linux Mint 10 but I guess it should also work in a normal {{Ubuntu}} 10.10 installation.

MultiTouch

2011-05-26T18:04:28Z

Kristine:

__NOTOC__
{| width="100%"
|style="vertical-align:top" |[[Image:Logo_wacom.gif|Wacom Logo]]
|style="vertical-align:top" |
<div style="margin:0px; border: 1px solid #dfdfdf; padding: 0em 1em 1em 1em; background-color:#F8F8FF; align:right;">
=== MultiTouch ===
Some models come with touchscreen abilities, known as MultiTouch.
</div>
|}

MultiTouch is a new feature on recent models of the X60/X61/+ Tablet. It allows you to use any device that can create pressure (such as your finger) instead of the tablet pen. This feature is currently ''experimentally'' supported with linuxwacom. However, the tablet pen will still work on such systems.

with the wacom drivers, it will only support as a single-touch interface and not as real multitouch.

If you tablet pen does not work, try building the linuxwacom modules from source. You can find everything you need [http://linuxwacom.sourceforge.net at their website].

[experience from x201 tablet] Today you only get 2 fingers from the display without pressure. The pen is working normal (with pressure).

A multitouch screen is an optional upgrade for the (non-tablet) {{T410s}}. As of January 2011, this is not recommended. Although it has some support as an input device, it seems to cause signficiant stability problems. On Ubuntu it prevents suspend from working; on both Debian and Ubuntu it seems to cause instability in X; and on Debian, while suspend works, wakeup from suspend seems quite unreliable.

On Linux Mint 10 (and Ubuntu) you can fix this by disabling the kernel module during suspend. See [[Fix_for_suspend_problems_on_T410s_with_touchscreen|Fix for suspend problems on T410s with touchscreen]].

Fix for suspend problems on T410s with touchscreen

2011-05-26T17:59:44Z

Kristine: â†Created page with 'In {{Ubuntu}} (and a lot of other Linux distrubutions) the Lenovo {{T410s}} with a touchscreen has the issue that it cannot go into suspend. It is the kern...'