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How to rotate screen AND input (consistently)

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  How to rotate screen AND input (consistently) riveravaldez <riveravaldezmail@gmail.com> - 2021-11-20 07:50 +0100
    Re: How to rotate screen AND input (consistently) Dan Ritter <dsr@randomstring.org> - 2021-11-20 13:10 +0100
      Re: How to rotate screen AND input (consistently) David Wright <deblis@lionunicorn.co.uk> - 2021-11-20 17:20 +0100
      Re: How to rotate screen AND input (consistently) Loïc Grenié <loic.grenie@gmail.com> - 2021-11-20 17:20 +0100
      Re: How to rotate screen AND input (consistently) riveravaldez <riveravaldezmail@gmail.com> - 2021-11-21 02:20 +0100

#242262 — How to rotate screen AND input (consistently)

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Hi,

I'm on Debian 11 in a ThinkPad X220 Tablet (convertible)
and I need to rotate the display (both physically and GUI)
which I do with:

$ xrandr --output LVDS-1 --rotate inverted

But then the input (trackpad/mouse, stylus, touchscreen, etc.)
doesn't rotate accordingly, so it gets unusable...

I've been reading different recommendations online
but can't figure out which would be the best/proper/simpler
approach to achieve this reliably (that hardware input
stays consistent with the GUI in display when rotated).

What should I do? Any hint?

Thanks a lot!

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#242263

riveravaldez wrote: 
> Hi,
> 
> I'm on Debian 11 in a ThinkPad X220 Tablet (convertible)
> and I need to rotate the display (both physically and GUI)
> which I do with:
> 
> $ xrandr --output LVDS-1 --rotate inverted
> 
> But then the input (trackpad/mouse, stylus, touchscreen, etc.)
> doesn't rotate accordingly, so it gets unusable...

Right, because for most cases, rotating a monitor doesn't mean
picking up your mouse and rotating it, too.

If you've got an external mouse, you'll see that works just
fine, but that defeats the point of a tablet.

> I've been reading different recommendations online
> but can't figure out which would be the best/proper/simpler
> approach to achieve this reliably (that hardware input
> stays consistent with the GUI in display when rotated).
> 
> What should I do? Any hint?

I haven't done this, but I believe xinput is going to be your
friend. It can list devices, list properties, and set whatever
needs to be set.

The older way of doing this is to get into the Mouse section of 
your xorg.conf.

Wayland has its own ways, which perhaps someone else can
explain.


-dsr-

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#242266

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On Sat 20 Nov 2021 at 06:46:45 (-0500), Dan Ritter wrote:
> riveravaldez wrote: 
> > 
> > I'm on Debian 11 in a ThinkPad X220 Tablet (convertible)
> > and I need to rotate the display (both physically and GUI)
> > which I do with:
> > 
> > $ xrandr --output LVDS-1 --rotate inverted
> > 
> > But then the input (trackpad/mouse, stylus, touchscreen, etc.)
> > doesn't rotate accordingly, so it gets unusable...
> 
> Right, because for most cases, rotating a monitor doesn't mean
> picking up your mouse and rotating it, too.
> 
> If you've got an external mouse, you'll see that works just
> fine, but that defeats the point of a tablet.
> 
> > I've been reading different recommendations online
> > but can't figure out which would be the best/proper/simpler
> > approach to achieve this reliably (that hardware input
> > stays consistent with the GUI in display when rotated).
> > 
> > What should I do? Any hint?
> 
> I haven't done this, but I believe xinput is going to be your
> friend. It can list devices, list properties, and set whatever
> needs to be set.
> 
> The older way of doing this is to get into the Mouse section of 
> your xorg.conf.
> 
> Wayland has its own ways, which perhaps someone else can
> explain.

Indeed, I do this with xinput in X. My function is called
synaps for historical reasons. The xinput is extracted from
my bin/xinput-xsession, which itself is called from .xsession
because keeping it separate allows you to call it at any time,
nut just when X starts.

Anyway, they're both attached, lightly anonymised, The
reference to viewports may only make sense if you use fvwm.

Cheers,
David.

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#242267

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Le sam. 20 nov. 2021 à 13:03, Dan Ritter <dsr@randomstring.org> a écrit :

> riveravaldez wrote:
> > Hi,
> >
> > I'm on Debian 11 in a ThinkPad X220 Tablet (convertible)
> > and I need to rotate the display (both physically and GUI)
> > which I do with:
> >
> > $ xrandr --output LVDS-1 --rotate inverted
> >
> > But then the input (trackpad/mouse, stylus, touchscreen, etc.)
> > doesn't rotate accordingly, so it gets unusable...
>
> Right, because for most cases, rotating a monitor doesn't mean
> picking up your mouse and rotating it, too.
>
> If you've got an external mouse, you'll see that works just
> fine, but that defeats the point of a tablet.
>
> > I've been reading different recommendations online
> > but can't figure out which would be the best/proper/simpler
> > approach to achieve this reliably (that hardware input
> > stays consistent with the GUI in display when rotated).
> >
> > What should I do? Any hint?
>
> I haven't done this, but I believe xinput is going to be your
> friend. It can list devices, list properties, and set whatever
> needs to be set.


    I do something like that. In my script the two corresponding
  lines are:

TOUCHPAD=`xinput --list --short | grep Synaptics | grep -i pointer | sed -e
's/.*id=//' -e 's/[^0-9].*//'`
xinput set-prop $TOUCHPAD 169 0 -1 0 1 0 0 0 0 1

    169 is the "coordinate transformation matrix" for my touchpad.

        Hope this helps,

             Loïc

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#242276

On 11/20/21, Dan Ritter <dsr@randomstring.org> wrote:
> riveravaldez wrote:
>> Hi,
>>
>> I'm on Debian 11 in a ThinkPad X220 Tablet (convertible)
>> and I need to rotate the display (both physically and GUI)
>> which I do with:
>>
>> $ xrandr --output LVDS-1 --rotate inverted
>>
>> But then the input (trackpad/mouse, stylus, touchscreen, etc.)
>> doesn't rotate accordingly, so it gets unusable...
>
> Right, because for most cases, rotating a monitor doesn't mean
> picking up your mouse and rotating it, too.
>
> If you've got an external mouse, you'll see that works just
> fine, but that defeats the point of a tablet.

Absolutely right. Thanks a lot for the information.

>> I've been reading different recommendations online
>> but can't figure out which would be the best/proper/simpler
>> approach to achieve this reliably (that hardware input
>> stays consistent with the GUI in display when rotated).
>>
>> What should I do? Any hint?
>
> I haven't done this, but I believe xinput is going to be your
> friend. It can list devices, list properties, and set whatever
> needs to be set.

Thanks, Dan, I'm going to check it.

> The older way of doing this is to get into the Mouse section of
> your xorg.conf.
>
> Wayland has its own ways, which perhaps someone else can
> explain.

Thanks a lot again.
Just to avoid any waste of help, there's nothing/no wayland package
in this box, pure X.

Regards!

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