https://bugzilla.kernel.org/show_bug.cgi?id=48681
Summary: Brightness controls on Dell Latitude E6530 broken
Product: ACPI
Version: 2.5
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Power-Video
AssignedTo: [email protected]
ReportedBy: [email protected]
Regression: No
Created an attachment (id=82821)
--> (https://bugzilla.kernel.org/attachment.cgi?id=82821)
Logs (Kernel 3.4)
It looks, I am experiencing a similar problem to bug 47861
(https://bugzilla.kernel.org/show_bug.cgi?id=47861)
I first experienced the problem on later kernels, but now also do experience
the problem on kernel 3.4 - however, it already worked with 3.4. After several
tests - sometimes I have this problem after boot and sometimes not. In my case
it is not the Fn + F7 and F8 (as in the other bug), but Fn + Cursor up and down
that should do the brightness regulation and do not work.
Interestingly in my case Fn + F1 (Put to suspend) works.
So somehow it seems not to be the keyboard the problem.
Another interesting thing I can observe: When I plugin the power cord to my
laptop the screen dims and gets brighter again when I plug it off. This is the
opposite effect that usually should be (being that while on power the screen is
brighter as on battery).
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