https://bugzilla.kernel.org/show_bug.cgi?id=58091
Summary: Backlight control regression on System 76 laptop with
Nvidia GPU
Product: ACPI
Version: 2.5
Kernel Version: 3.9.2
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Power-Video
AssignedTo: [email protected]
ReportedBy: [email protected]
Regression: Yes
Created an attachment (id=101341)
--> (https://bugzilla.kernel.org/attachment.cgi?id=101341)
lspci -vvv output
The backlight controls worked fine with kernel version 3.8.12, and don't work
with 3.9.2. /sys/class/backlight is now empty.
I had this problem with 3.4.x too, and the "still use ACPI backlight control if
_DOS doesn't exist" patch in bug 43168 fixed it for me then.
In syslog, this line is there when I boot with 3.8.12, but not 3.9.2:
nouveau [ DRM] ACPI backlight interface available, not registering our own
--
Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are watching the assignee of the bug.
------------------------------------------------------------------------------
AlienVault Unified Security Management (USM) platform delivers complete
security visibility with the essential security capabilities. Easily and
efficiently configure, manage, and operate all of your security controls
from a single console and one unified framework. Download a free trial.
http://p.sf.net/sfu/alienvault_d2d
_______________________________________________
acpi-bugzilla mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
