[Bug 1562734] Re: Onboard keyboard shows black box on login

marmuta 1562734 at bugs.launchpad.net
Thu Apr 14 10:33:42 UTC 2016


Thanks for the log. It's recreated on each reboot, so I only see the one
from the latest boot. The contents are slightly different from what I
get here, but I don't see anything really suspicious. Everything seems
to go as planned, and the fact that you can briefly see the keyboard now
only confirms that. I still have no good idea what would cause it to go
black after half a second.

Is the keyboard window moved/resized or hidden for some reason? The log doesn't show this yet, unfortunately, but you could try this:
- reboot, wait for login screen
- switch to a different virtual console, e.g. CTRL+ALT+F1 and login
- type
  $ xauth add :0 $(sudo xauth -f /var/run/lightdm/root/\:0 list | grep -o MIT.*)
  $ xwininfo -display :0 -name "Onboard" | tee onboard-xwininfo.txt

and post onboard-xwininfo.txt. It helps if you add these commands to
~/.bash_history beforehand, then you won't actually have to type them
out.

Is there a video mode switch happening after the 500ms delay? I've
noticed with my test partition, that no matter what video options I set
in xorg.conf.d or lightdm's display-setup-script, unity-greeter always
reverts back to the monitor's defaults. If that happens on your system
there should be an entry at the end of your /var/log/Xorg.0.log. Please
attach that file too. Make a copy before you login, e.g. from the same
virtual console you just used above.

One more thing to try, if you haven't done so already: 
- boot to login
- turn keyboard off (via indicator)
- reboot to login
- turn keyboard on
Does that change anything?

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https://bugs.launchpad.net/bugs/1562734

Title:
  Onboard keyboard shows black box on login

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