Pmbootstrap: Let's get KDE plasma mobile running!

[ollieparanoid]

Follow up to Package Plasma Mobile #161.

The current status is, that kwin does not run yet, and we're working together with KDE's developers in this ticket: https://bugs.kde.org/show_bug.cgi?id=383486

Additionally, the dependency dbus-launch hangs for a minute or so, see #377.

[PureTryOut]

We got kwin (and postmarketos-demos on it) to run succesfully! 🎉

Note that the mouse is stuck, as for some reason kwin_libinput doesn't detect the mouse, as a mouse. Quite strange, I know.

But a lot of progress! Next up is getting the mouse working, and then launching the Plasma Shell. Should be relatively smooth sailing from here on out.

[PureTryOut]

It now runs!

Plasma shell running on postmarketOS

As you can see in the video, there is still some work to do, but we're getting really close!

[zhuowei]

@PureTryOut I tested your branch on my Nexus 6P (checked out postmarketos-ui-plasma-mobile branch, rebased on top of master, fixed a few checksum issues and kinit's recursive dependency (?)). Found two issues:

• ConsoleKit isn't started at boot, so kwin hangs forever.
• After I manually start console-kit-daemon, kwin exits with
  "FATAL ERROR: backend failed to initialize, exiting now"

The last line before this in strace was:
ioctl(21, FBIOGET_VSCREENINFO, 0x7fe2332c80) = 0

so it looks like it hates my framebuffer.

My fbset is:

mode "1440x2560-0"
    # D: 1.101 MHz, H: 0.655 kHz, V: 0.249 Hz
    geometry 1440 2560 1440 2560 32
    timings 908582 100 100 31 30 40 8
    accel false
    rgba 8/0,8/8,8/16,8/24
endmode

note the last line: my framebuffer's RGBA offsets are opposite from what KDE expects (ARGB).

https://github.com/KDE/kwin/blob/v5.10.5/plugins/platforms/fbdev/fb_backend.cpp#L188

Edit: I forced my framebuffer into a mode that kwin supports by creating a fb.modes file, editing it to ARGB, and then running fbset 1440x2560-0. Finally I set the QTQuick renderer based on the wiki page. Now kwin starts up slightly further: https://gist.github.com/zhuowei/cb0f2db36478a7bd15ba0108afc0e5df

Edit: It launches! Sent a PR.

[ollieparanoid]

Could you take a photo? \o/

[ollieparanoid]

It works, with video proof:
https://postmarketos.org/blog/2017/12/31/219-days-of-postmarketOS/#plasma-mobile