Running Mir on phablet

Daniel van Vugt daniel.van.vugt at
Tue Jul 30 08:52:59 UTC 2013

On the other hand, if you follow mterry's instructions for disabling 
surfaceflinger, the screen never locks. So it seems like a good 

We should make the instructions [1] a bit clearer and add them to the 
docs in lp:mir.


On 30/07/13 16:38, Daniel van Vugt wrote:
> SurfaceFlinger actually coexists with Mir so long as it's not being used
> (Unity8). It's quite happy to let Mir flip buffers when it's not (stop
> ubuntu-touch-session USER=phablet).
> My issue is that I can't start Mir if it happens that the screen has
> been turned off (locked/screensaver). Mir doesn't have the smarts to
> know how to turn it on. Unless I'm doing something wrong...
> This issue was first reported as part of:
> On 30/07/13 16:24, Kevin Gunn wrote:
>> Hey Daniel,
>> I'm no expert, but is there a chance you're fighting with
>> surfaceflinger...this is what the intended Kevin usually says.
>> Apparently its fairly stubborn about being killed (and tries
>> aggressively restart)
>> Also, mterry had put together some updated instructions
>> just in case things have change from what process you might be following.
>> it has some surface flinger related instructions at the bottom...hoping
>> it helps.
>> br,kg
>> On Tue, Jul 30, 2013 at 3:06 AM, Daniel van Vugt
>> <daniel.van.vugt at <mailto:daniel.van.vugt at>>
>> wrote:
>>     Kevin, anyone,
>>     I notice running Mir on the latest phablet images (Nexus 4) is still
>>     not foolproof. Half the time, when I stop Unity8, that completely
>>     blanks the screen which prevents any Mir server from starting.
>>     Mir can only start, it seems, if the screen is not fully blanked. If
>>     it is blanked then I get permission errors (failed to unblank
>>     display), even running as root.
>>     What's the trick/recommended approach? It seems my old tricks don't
>>     work any more now the phablet images are "flipped".
>>     - Daniel
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