Ok, with Alexandros' help I've dug a bit more.
On my hardware, I tear everything down and just run
sudo mir_demo_server_basic --arw-file
I can see clients ok.
I forked mir_demo_client_display_config to add extra bits:
https://code.launchpad.net/~gerboland/+git/display-configurator
which adds an "O" option to power off the display
When I run it, and hit "O", the display flickers 8 times and then stays
off (mir_power_mode_off)
If I hit "P" to turn it on again, nothing happens (mir_power_mode_on).
Applying the configuration appears to hang the client - I get no success
or fail response from Mir.
If I kill the client, Mir re-activates the display (flickering 8 times)
** Changed in: mir
Status: Incomplete => New
** Changed in: unity8 (Ubuntu)
Status: Incomplete => Invalid
** Changed in: repowerd (Ubuntu)
Status: Incomplete => Invalid
** Summary changed:
- [amd] screen-unblanking seems to flicker backlight on/off 5 times before
display resumes
+ [amd] screen-unblanking seems to flicker backlight on/off 8 times before
display resumes
** Changed in: repowerd
Status: Incomplete => Invalid
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https://bugs.launchpad.net/bugs/1667001
Title:
[amd] screen-unblanking seems to flicker backlight on/off 8 times
before display resumes
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