[Bug 88861] [efi, i915, vgaswitcheroo, black screen, nouveau] Screen goes black when switching from dedicated nvidia graphics card (nouveau) to integrated

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=88861

--- Comment #27 from Wilfried Klaebe (linux-kernel at lebenslange-mailadresse.de) ---
Created attachment 273877
  --> https://bugzilla.kernel.org/attachment.cgi?id=273877&action=edit
dmesg of logdep splat on 4.15-rc9 minus 4eebd5a4e726

logdep splat from Linux 4.15-rc9 with commit 4eebd5a4e726 reverted.
The splat occurred after echoing first "DIS", then "OFF" into
/sys/kernel/debug/vgaswitcheroo/switch. The "switched off" in the first line
likely is from drivers/gpu/drm/i915/i915_drv.c:584,
i915_switcheroo_set_state().

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