Bug 87235

Summary:	Cannot vga switch between i915 and radeon.
Product:	DRI	Reporter:	William Brown <william>
Component:	DRM/Intel	Assignee:	Intel GFX Bugs mailing list <intel-gfx-bugs>
Status:	CLOSED WONTFIX	QA Contact:	Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity:	normal
Priority:	medium	CC:	intel-gfx-bugs
Version:	XOrg git
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description William Brown 2014-12-11 12:47:23 UTC

After getting the system to a sane state post boot on a macbook pro 8,2, with the DIS connected, IGD disconnected and off, turning on the IGD then performing a switch fails with:

kernel: vga_switcheroo: client 0 refused switch.

No X server was running at the time, only TTY.

The dmesg output is attached.

Comment 1 Rodrigo Vivi 2015-01-22 00:46:13 UTC

Some hybrid has certain outputs directly associated with only one or other gpu.
This seems to be the case here.

Could you please attach dmesg (booted with drm.debug=0xe) and Xorg.0.log as well.

Please use a recent kernel. Preferably drm-intel-nightly branch from cgit.freedesktop.org/drm-intel

Comment 2 Ander Conselvan de Oliveira 2015-06-04 14:30:04 UTC

(In reply to Rodrigo Vivi from comment #1)
> Could you please attach dmesg (booted with drm.debug=0xe) and Xorg.0.log as
> well.

We can't debug this without that information.

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