https://bugzilla.kernel.org/show_bug.cgi?id=28072
Summary: 2.6.38rc Kernels break LCD brightness adjustment on
Acer Laptop
Product: ACPI
Version: 2.5
Kernel Version: 2.6.38rc3
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Other
AssignedTo: [email protected]
ReportedBy: [email protected]
Regression: Yes
Description of problem:
Kernel Linux garage 2.6.38-rc3 #1 SMP Tue Feb 1 17:12:58 EST 2011 x86_64 x86_64
x86_64 GNU/Linux LCD brightness function keys on Acer laptop. This works fine
in 2.6.37 builds. So far all .38 builds have had this problem.
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset
Integrated Graphics Controller (rev 07) (prog-if 00 [VGA controller])
Subsystem: Acer Incorporated [ALI] Device 029b
Flags: bus master, fast devsel, latency 0, IRQ 43
Memory at d0000000 (64-bit, non-prefetchable) [size=4M]
Memory at c0000000 (64-bit, prefetchable) [size=256M]
I/O ports at 30d0 [size=8]
Expansion ROM at <unassigned> [disabled]
Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [d0] Power Management version 3
Kernel driver in use: i915
Kernel modules: i915
00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset
Integrated Graphics Controller (rev 07)
Subsystem: Acer Incorporated [ALI] Device 029b
Flags: bus master, fast devsel, latency 0
Memory at d2400000 (64-bit, non-prefetchable) [size=1M]
Capabilities: [d0] Power Management version 3
Please see attached dmesg output. Happy to provide any other info or test
builds/patches etc.
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