https://bugzilla.kernel.org/show_bug.cgi?id=43228
Summary: Commit 1cc0c998fdf2cb665d625fb565a0d6db5c81c639 breaks
turning off nvidia optimus card
Product: ACPI
Version: 2.5
Kernel Version: 3.4-rc6
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Other
AssignedTo: acpi_ot...@kernel-bugs.osdl.org
ReportedBy: rockoreq...@hotmail.com
Regression: No
The bbswitch kernel module from https://github.com/Bumblebee-Project turns off
hybrid optimus nvidia cards when they are not being used.
However, after commit 1cc0c998fdf2cb665d625fb565a0d6db5c81c639 (ACPI: Fix D3hot
v D3cold confusion) bbswitch can no longer turn off the NVIDIA 540M video card
on my Dell XPS15 (L502x). Reverting the commit fixes the problem.
http://lists.opensuse.org/opensuse-kernel/2012-05/msg00039.html looks like the
same issue on another PC.
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