Issue with mir on Ubuntu Touch and Samsung Galax S3 (i9300)

Daniel van Vugt daniel.van.vugt at
Mon Mar 27 01:38:15 UTC 2017

I know device screens turn black/off during testing, and it can be a 
problem. I use a simple workaround for that when trying new Mir binaries:

$ sudo stop repowerd
$ mirbacklight    # (or mirbacklight 99)

On 25/03/17 05:35, Florian Leeber wrote:
> Hello All,
> I am faithfully trying to port the current Ubuntu Touch vivid image to
> the Samsung Galaxy S3 (i9300). Basically I have a good progress, the
> phone is booting, kernel is fine, lxc container started etc...
> But, again as already seen on a previous porting with an even older
> device, I am stuck with graphics:
> - regardless of the test I try (mir tests) I always get
> libEGLvalidate_display:262 3008 (EGL_BAD_DISPLAY)
> - screen stays dark (actually who is turning on and off the screen, and
> where is the timer for the default screen blanking, can I disable that)
> Can you help me to find out why this is happening? Basic test_egl and
> test_glesv2 seem to be fine (though I cant tell for sure w/o a screen)
> BR Florian

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