Update Known Issues on Mir installation page?

[Daniel van Vugt]

Joe,

Feedback is appreciated. And mir-devel is relatively quiet so it's a 
good place, for now.

Compiz CPU usage is most certainly not related to Mir in any way. It 
generally trends with screen "damage" which is when any part of the 
screen changes. Compiz CPU is however significantly impacted by the 
relatively large and complex unityshell plugin that runs inside it. And 
unityshell does affect the damage calculations too. But still, that's 
all not related to Mir.

- Daniel


On 09/09/13 19:27, Joseph Rushton Wakeling wrote:
> On 04/09/13 03:32, Daniel van Vugt wrote:
>> The distortion around the mouse cursor is known:
>> https://bugs.launchpad.net/xmir/+bug/1218735
>>
>> And the general skipping/freezing I think is covered by:
>> https://bugs.launchpad.net/xmir/+bug/1216472
>>
>> Both bugs have workarounds you can try.
>>
>> Those are significant bugs which confuse and mask each other. I don't
>> think it
>> would be useful to hypothesize about further display bugs until
>> they're squashed
>> and out of the equation.
>
> Belated thanks for the info. :-)
>
> Just as a "qualitative" report -- I don't want to speculate about
> particular bugs -- things got much better with Mir updates that arrived
> shortly after your last email.
>
> The issue with video playback has become more subtle.  What seems to
> happen is that any video playback of any kind results in Compiz
> massively increasing its CPU usage, and that heightened CPU burden
> doesn't go away when the video has stopped -- it's less than when the
> video was playing, but not absent.
>
> The effect is more strongly pronounced if e.g. the video is HTML5 video
> being played through a web browser, rather than a local file being
> played via mplayer -- but it's there in all cases.  System
> responsiveness as a whole decreases as a result.
>
> I suspect this can also be interpreted in terms of existing bugs --
> maybe even the ones you already pointed me to -- so don't worry about
> spending time responding to me or pointing me to bug reports.  I have
> strong trust in the Mir team to solve all the significant problems
> before release, this email is just an "FYI". :-)
>
> But do let me know if this use of the mir-devel list is inappropriate --
> I don't want to take up space and attention here if these kind of user
> experience reports can be better made elsewhere.
>
> Thanks & best wishes,
>
>      -- Joe