Missing mouse pointer in KWin on Wayland with Etnaviv

[Martin Flöser]

Am 2017-11-01 20:08, schrieb Matthias Klumpp:
> This makes complete sense. I didn't know that there was such as thing
> as a mouse cursor layer (why would the cursor be special?). When
> running Weston, I do get a cursor though, so I guess it's using some
> kind of emulation.

Cursor layer is quite normal on desktop hardware. The base idea is that 
you don't need to update the complete screen just because the cursor 
moved.

> 
>> Whether that's the case is something which can only be tested with the
>> hardware (e.g. adding a break point and seeing where KWin goes). If 
>> that's
>> the case we can easily fix it by using the sofware rendered cursor. 
>> IIRC
>> that is only available in 5.11, though.
> 
> Neat!

As I just worked on the drm platform today and especially on cursor (I'm 
working on screen rotation), I can say that it's quite easy to hook that 
up. We have everything in place: we know whether there is a cursor plane 
and we have the API to force software emulation. It's just not combined.

Btw. KWin logs which planes it finds. So if you enable all debug 
information you should find in the logs whether a cursor plane exists.

"type"  has enums: QVector("Primary", "Cursor", "Overlay")
Test all 3 possible enums:
Enum 'Overlay': runtime-value = 0
Enum 'Primary': runtime-value = 1
Enum 'Cursor': runtime-value = 2
=> "type" with mapped enum value "Cursor"

If you don't have anything about Cursor, we have a candidate.

> Performance isn't great at all at the moment (and stability also
> isn't, it crashes as soon as I try to pull down the top drawer), but
> aside from these things which are actually minor issues, the whole UI
> looks fairly complete and pretty nice.

As you are on Debian: make sure you get Qt 5.9.2. Debian testing 
currently only has Qt 5.9.1 and there are important fixes. Best would be 
to get the latest patches for QtWayland of the 5.9 branch. I'm currently 
running a self compiled QtWayland based on 5.9.1 with the patches from 
5.9.2 on top of Debian. Without it was hardly usable at all. Apps are 
crashing at random, especially when virtual keyboard support is 
available in KWin.

Also a newer KWin than what Debian has is highly recommended. Qt 5.9 
caused regressions for us and I'm not sure whether Plasma 5.10 has all 
the required fixes. Plasma 5.11 has them.

Cheers
Martin