[Bug 55311] Since 3.7.1-17.1 radeon has no backlight when using vgaswitcheroo (regression)

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=55311

--- Comment #40 from Tom Wijsman <TomWij at gentoo.org> ---
(In reply to jimis hol from comment #39)
> As noted in https://bugs.gentoo.org/show_bug.cgi?id=458746 and Tom wrote
> removing intel_modeset_disable(dev); from sys-kernel/gentoo-sources-3.9.6
> made radeon visible again. Going to 3.10.0, however, even if
> intel_modeset_disable(dev); line isn't present in 
> drivers/gpu/drm/i915/i915_drv.c disappears radeon screen again.

Yeah, sorry, haven't looked at the other things the patch did.

    list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
        dev_priv->display.crtc_disable(crtc);

Removing the above two CRTC disable lines should be a temporary fix for 3.10.

I think these somehow not need to be called when vga_switcheroo is being used.

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