Bug 91474

Summary:	egl initializes wrong card with hybrid graphics card
Product:	Mesa	Reporter:	Marek Chalupa <mchqwerty>
Component:	EGL/Wayland	Assignee:	Wayland bug list <wayland-bugs>
Status:	RESOLVED NOTOURBUG	QA Contact:	mesa-dev
Severity:	normal
Priority:	medium
Version:	unspecified
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Marek Chalupa 2015-07-27 15:25:33 UTC

Don't know about it much, but according to strace and logs it look like the user is using intel graphics card and egl is trying to use radeon graphics card, which then results in:

Unable to initialize Clutter: No currently active connector found

https://bugzilla.redhat.com/show_bug.cgi?id=1200439

Comment 1 Axel Davy 2015-07-28 11:52:24 UTC

Mesa egl does indeed support DRI_PRIME for the wayland backend,

however unless DRI_PRIME is set, it uses the same card that the server.
I guess either the user has set DRI_PRIME or the equivalent drirc option,
or Clutter is incorrectly choosing the radeon card as main card, and initialises wayland with it.

I do not believe the bug is Mesa side.

Comment 2 Emil Velikov 2015-07-28 11:59:22 UTC

Using the device extensions one will be able to enumerate and select the device they want without the need of X or the DRI_PRIME variable.

Jonny Lamb posted a series that implements the "base" - device_enumeration + device_query, a few days ago.

[1] http://lists.freedesktop.org/archives/mesa-dev/2015-July/089783.html

Comment 3 Marek Chalupa 2015-07-30 09:27:49 UTC

(In reply to Axel Davy from comment #1)
> Mesa egl does indeed support DRI_PRIME for the wayland backend,
> 
> however unless DRI_PRIME is set, it uses the same card that the server.
> I guess either the user has set DRI_PRIME or the equivalent drirc option,
> or Clutter is incorrectly choosing the radeon card as main card, and
> initialises wayland with it.
> 
> I do not believe the bug is Mesa side.

Was digging into the code a bit and you're probably right. It looks like mutter is always using /dev/dri/card0 (which is the radeon in this case)

https://git.gnome.org/browse/mutter/tree/src/backends/native/meta-launcher.c#n270

Comment 4 Marek Chalupa 2015-08-10 07:26:13 UTC

https://bugzilla.gnome.org/show_bug.cgi?id=753434

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