trinity-users@lists.pearsoncomputing.net

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Month: September 2015

Re: [trinity-users] Screen rotates but touchscreen does not!

From: Thierry de Coulon <tdecoulon@...>
Date: Mon, 7 Sep 2015 07:29:53 +0200
On Monday 07 September 2015 00.18:26 Timothy Pearson wrote:
(...)
> > The puzzle is this: TDE proposes a system tray applet named "Resize and
> > Rotate". It works like a charm, wich is usefull because the X220t's
> > battery
> > is a little bulky and lifts the back of the computer This is good in
> > Notebook
> > mode, but in Tablet mode, with the screen _physicaly_ rotated 180°, it's
> > the
> > front that is higher that the back. So if I rotate the screen _per
> > software_
> > 180° everything is fine...  However, the digitizer does not get the
> > information, so the pointer appears on the wrong side of the screen -
> > this is
> > funny for 30 seconds but unusable after that.
> >
> > So, does anyone have an idea how to also rotate the touchscreen digitizer
> > 180°? This does work in Windows 10, but I'd prefer to use Linux :)
> >
> > Have a nice evening,
> >
> > Thierry
>
> Interesting!  I've never had the opportunity to use TDE on a tablet
> computer, so I'm somewhat surprised it's working even that well.
>
(...)
>
> A quick Google search show that this might be an Xorg bug:
> https://bugs.launchpad.net/ubuntu/+source/acpi-support/+bug/217182
>
> There is also a potential workaround via the wacomrotate package:
> https://bugs.launchpad.net/ubuntu/+source/acpi-support/+bug/217182/comments
>/14
>
> Most likely we need to:
> 1.) Make TDE aware of the digitizer (you can help with this by sending in
> the terminal spew generated when you execute "tdecmshell hwmanager")
> 2.) apply whatever workaround is in that wacomrotate package when screen
> rotation is requested via tdehwlib.
>
> Tim

Hi Tim,

Thank you for the pointers to Xorg. I'll try the workaround and report if they 
cure the problem.

Runing tdecmshell hwmanager gives this on the terminal:

[tdebuildsycoca] tdebuildsycoca running...
[tdebuildsycoca] Reusing existing tdesycoca.
[dcopserver] DCOP Cleaning up dead connections.
[FIXME] UNCLASSIFIED DEVICE name: ptp0 type: (null) subsystem: ptp driver: 
e1000e [Node Path: /dev/ptp0] 
[Syspath: /sys/devices/pci0000:00/0000:00:19.0/ptp/ptp0] [8086:1502]

Then hwmanager opens but I did not have time yet to look in detail.

I've bought this "convertible" out of dissatisfaction with tablets and I must 
say that, if it's more heavy, it's far better. No Linux distribution / 
interface I've tried was really satisfying. KDE is really bad, Gnome 3 is 
partly usable, maybe Unity is better.

The basic problem is that a good desktop interface is hi-resolution but our 
fingers are not made for that...  And a touch interface looks like a stuipid 
waste of pixel on a desktop.

The convertible lets me use the laptop as usual (with TDE) and use the 
digitizer only when needed (for teaching).

Globaly I'd say TDE works better that KDE on this machine. If we wanted 
a "tablet mode" we would need a way to make all command zones bigger in that 
mode.

If I can provide any information just ask - I don't know if this is really 
much needed, but I guess touchscreens will get more frequent now.

Thierry