Posts tagged 'laptop'

Configuring the trackpad and touchpad behaviour for Thinkpad T540p on Fedora 21

published on December 22, 2014.
Heads-up! You're reading an old post and the information in it is quite probably outdated.

This is the last post about the Thinkpad and Fedora. At least for a while. Promise.

With the new generation of Thinkpads, Lenovo decided to change the touchpad. They removed the 5 physical buttons from the touchpad area and left us with one bigger touchpad. To click anything it’s now either touch click (two-finger click for right clicks) or one can push the entire touchpad down, the clickpad. The touchpad has different regions for getting left/middle/right clicks. Sort of.

And for the first time I completely agree with reviews on the internet. This thing is horrible.

If you want both the touch and push clicks, forget it. It just won’t be usable how inaccurate this thing is. If the touch click is turned on, it will get in the way of your typing. You forget yourself and do a push click with the touch click enabled? Here’s some double/triple click for you. Just don’t even bother with the touch click, turn it off.

You’re left now with the trackpad and touchpad for movement, and the clickpad for clicks. Again, pain. You push down the touchpad to click aaand… Good luck and I hope you clicked the thing you wanted. Your finger will move, just a little bit and so will the cursor. And here’s the kicker. Touchpad movements can’t be turned off. At least not in a easy and intuitive way.

After quite some time searching the internet for a fix, I found a forum post explaining how to get this thing usable (sadly, I can’t find that post again to link to it):

Section "InputClass"
    Identifier "TrackPad with buttons only"
    MatchDriver "synaptics"
    Option "SoftButtonAreas" "65% 0 0 0 50% 65% 0 0" # emulate right and middle buttons
    Option "AreaBottomEdge" "1" # disable moving but not buttons

Save this as 99-thinkpad-clickpad.conf in /etc/X11/xorg.conf.d/. The touch parts of the touchpad are disabled so we have the trackpad for movements and the clickpad for buttons. I just need to tweak the left/middle/right button clicks a bit more, because there are times when I accidentally do a middle click.

Oh, and now there’s no mouse scroll because that’s touchpad only.

Battery charge thresholds for Thinkpad T540p on Fedora 21

published on December 19, 2014.
Heads-up! You're reading an old post and the information in it is quite probably outdated.

This week I got myself a new laptop, a Thinkpad T540p. One of the features it has is that the battery’s life can be prolonged by setting custom charging thresholds.

The start charge threshold tells the battery to start charging only when the charge drops bellow that limit, and the stop charge threshold tells the battery to stop the charging when the upper limit is reached. I set the start threshold to 40% and the stop threshold to 70%. I think this should be good enough for me as I mainly use my laptop at home where it’s always plugged in.

After a bit of a digging around, I managed to get it working under Fedora 21.

The main thing to know is that there is tp_smapi for older Thinkpad’s, and tpacpi-bat for the newer ones. I have a T540p so it’s the latter for me.

There is also tlp, but at the moment I couldn’t get it to work completely because it has no packages for Fedora 21 yet. Fedora 2019 should be OK though, and for those I would probably go with tlp.

After git cloning the repository, run the install perl script, and if all went OK, set the start threshold like:

./tpacpi-bat -s ST 1 40

and the stop threshold:

./tpacpi-bat -s SP 1 70

Where 1 is the battery number, starting from 1, and 40 and 70 are the start and the stop thresholds in percentage.

These settings should remain after a reboot, but what I noticed is that they are gone after taking out and putting the battery back in. When I tried to set the threshold parameters again, I couldn’t do it as the system was complaining about the missing acpi_call kernel module. I re-run the perl install script from tpacpi-bat and got it working again.

I’ll be on the lookout for the tlp packages for Fedora 21, that looks like it would work nicer than this.

Now the only last bit I’m missing is the battery cycle count, but seems current kernels don’t support it yet.

Robert Basic

Robert Basic

Software engineer, consultant, open source contributor.

Let's work together!

If you require outsourcing or consulting help on your projects, I'm available!

Robert Basic © 2008 — 2019
Get the feed