ubuntu-phone team mailing list archive

[Pavel Andrejs <pavel.andrejs@xxxxxxxxx>]

Hi Gerry,
the dimensions are wrongly detected, the mirout command returns this:

Connected to server: <default>
Card 0: Max 2 simultaneous outputs
Output 0: Card 0, LVDS, connected, 720x1280+0+0, used, off, 0mm x 0mm
(0.0"), normal
     720x1280     60.51*+
Output 1: Card 0, LVDS, disconnected
     720x1280     60.51*+

The screen is definitely bigger :) I suppose the problem is somewhere
in the android layer, but where to look?


Thanks everyone for advices. :)


Pavel


2015-10-08 13:41 GMT+02:00 Gerry Boland <gerry.boland@xxxxxxxxxxxxx>:
> On 07/10/15 13:36, Pavel Andrejs wrote:
>> Hi,
>> first of all, please, let me know, if I am on a wrong mailing list.
>> This page https://developer.ubuntu.com/en/start/ubuntu-for-devices/porting-new-device/
>> lead me here.
>>
>> To the problem - I noticed this error message
>>
>> DirectionalDragArea: recognition properties are wrongly set. Gesture
>> recognition is impossible
>>
>> in unity8 log. I did some debugging a found that in
>> unity8/plugins/Ubuntu/Gestures/DirectionalDragArea.cpp there is a
>> method  DirectionalDragArea::itemChange which calls
>> value.window->screen()->physicalDotsPerInch(). The last one returns a
>> bad value. This leads to an inf value pixelsPerMm later and disables
>> the gesture recognition. For now I solved this with a little hack - I
>> hardcoded pixelsPerMm to 306 / 25.4. With this the gesture recognition
>> works. I suppose I would eventually find the correct place for this
>> value, but some of you may have it faster :-)
>
> Hey Pavel,
> the QScreen::physicalDotsPerInch() calculation requires an accurate
> value for QScreen::physicalSize(). That is supplied via qtmir/qtubuntu
> by Mir.
>
> Mir tries to get this info from the hardware, but either the hardware
> doesn't know/lies, or Mir has a bug in retrieving this information.
>
> On your device, please run this command:
> sudo MIR_SOCKET=/run/mir_socket mirout
>
> Here is the output I get on my Nexus 7:
>   Connected to server: <default>
>   Card 0: Max 2 simultaneous outputs
>   Output 0: Card 0, LVDS, connected, 1200x1920+0+0, used, on, 95mm x
> 151mm (7.0"), normal
>       1200x1920     60.00*+
>   Output 1: Card 0, DisplayPort, disconnected
>
> where you see the physical dimensions of the display being printed. What
> do you see?
> -Gerry
>
>
>
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