docs/wiki/Screen-Calibration/index.html


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">

    <title>postmarketOS</title>

    <meta name="description" content="Aiming for a 10 year life-cycle for smartphones">
    <meta name="keywords" content="postmarketOS">

    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <meta name="robots" content="all">

    <link rel="canonical" href="https://postmarketos.org/wiki/Screen-Calibration/">

    <link href="/pmosweb/static/css/tachyons.min.css" rel="stylesheet">
    <link href="/pmosweb/static/css/main.css" rel="stylesheet">
  </head>

  <body>
    <div class="mw7 center">
      <div class="cf ph2-ns">
        <a class="title" href="/pmosweb/">
          <h1 class="f2 lh-title">
            <img src="/pmosweb/static/img/recycle.png"></img>
            <span>postmarketOS</span>
          </h1>
        </a>
        <div class="menu">
        <ul>
          <li><a href="/pmosweb/">Home</a></li>
          <li><a href="/pmosweb/wiki/">Wiki</a></li>
          <li><a href="/pmosweb/blog/">Blog</a></li>
        </ul>
        </div>
        
<h1>Screen Calibration</h1>
<h2>Framebuffer</h2>
<p>On most Android devices, a somewhat working framebuffer is required to get Weston and other Wayland compositors running. The alternative to framebuffer would be [[DRI|Glossary#dri]].</p>
<p>If your framebuffer does not work out of the box, try the following:
<em> Run this to set the framebuffer resolution: <code>cat /sys/class/graphics/fb0/modes &gt; /sys/class/graphics/fb0/mode</code>
</em> Boot TWRP/Android and read out the correct framebuffer configurations from the /sys... paths and try to set them in pmOS
* If you made it work, create an initfs hook, that instantly sets the framebuffer right. <a href="https://github.com/postmarketOS/pmbootstrap/blob/master/aports/device-lg-mako/initfs-hook.sh">Example</a></p>
<h2>Weston</h2>
<ul>
<li>Make sure, that Weston runs on the device</li>
<li>Look in <code>/tmp/weston.log</code> (via SSH) for the touch device name. For <code>lg-mako</code>, the name is <code>touch_dev</code>, but it may be different for your device.</li>
<li>Copy <a href="https://github.com/postmarketOS/pmbootstrap/blob/master/aports/device/device-lg-mako/90-android-touch-dev.rules">90-android-touch-dev.rules</a> from <code>device-lg-mako</code> to your device's aport. Replace <code>touch_dev</code> with your touch device name. Adjust the <code>APKBUILD</code>, so it gets installed properly (<a href="https://github.com/postmarketOS/pmbootstrap/blob/master/aports/device-lg-mako/APKBUILD">Example</a>)</li>
<li>This calibration may just work fine (it has been reported, that it works on <code>hammerhead</code>). If it does, you are done here. Otherwise continue for the calibration.</li>
<li>Connect to your phone via SSH</li>
<li>Get a root shell: <code>sudo su -</code> (Because right now, Weston runs as root)</li>
<li>Run <code>weston-calibrator</code> as root</li>
<li>Adjust your udev rules-file to the output from <code>weston-calibrator</code></li>
</ul>

      </div>
    </div>
  </body>
</html>