https://bugzilla.kernel.org/show_bug.cgi?id=49351
Summary: vga_switcheroo results in black screen (bisected)
Product: Drivers
Version: 2.5
Kernel Version: 3.7-rc1+
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Video(DRI - non Intel)
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Regression: Yes
Created an attachment (id=84381)
--> (https://bugzilla.kernel.org/attachment.cgi?id=84381)
lspci -vvv
On my muxed hybrid system (Lenovo IdeaPad U455) vga_switcheroo doesn't work as
expected. Initially after system booting both video cards are powered and the
IGD one is active. Then, when i try to switch active gpu with
# echo DIS > /sys/kernel/debug/vgaswitcheroo/switch
screen goes black.
The first bad commit, that broke vga_switcheroo is:
commit 492b49a2f21a7ce6cb0abce36017daa06036a626
Author: Alex Deucher <[email protected]>
Date: Thu Aug 16 14:07:37 2012 -0400
drm/radeon: reorganize ATPX support (v2)
- rework the acpi execute code
- User proper parameters for ATPX functions
v2: rebase fixes
Signed-off-by: Alex Deucher <[email protected]>
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