Bug#587014: [linux-2.6] screen brightness can't be modified on Panasonic S9
Package: linux-2.6
Severity: normal
--- Please enter the report below this line. ---
Presing the "light up" / "light down" keys doesn't modify the LCD
screen brightness.
Directly writing to /sys/class/backlight/panasonic/brightness has the
same effect : nothing.
/sys/class/backlight/panasonic/actual_brightness is modified, but the
screen brightness isn't affected.
I tried to reboot with lenny 2.6.26-2 kernel on the same system, and
the brightness could be changed by pressing the up/down keys, so I
believe it is a kernel issue (but gdm couldn't properly start, so it
is not a proper workaround).
It is a serious issue, since the screen default brightness is very
strong and uncomfortable.
I believe it is related to
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/588983
I tried to use acpi packages from unstable, without improvement.
--- System information. ---
Architecture: amd64
Kernel: Linux 2.6.32-5-amd64
Debian Release: squeeze/sid
700 testing security.debian.org
700 testing ftp.jaist.ac.jp
600 unstable ftp.jaist.ac.jp
500 stable ftp.jaist.ac.jp
00:00.0 Host bridge: Intel Corporation Core Processor DRAM Controller (rev 02)
Subsystem: Matsushita Electric Industrial Co., Ltd. Device 8338
Flags: bus master, fast devsel, latency 0
Capabilities: [e0] Vendor Specific Information: Len=0c <?>
Kernel driver in use: agpgart-intel
00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02) (prog-if 00 [VGA controller])
Subsystem: Matsushita Electric Industrial Co., Ltd. Device 8338
Flags: bus master, fast devsel, latency 0, IRQ 35
Memory at f0000000 (64-bit, non-prefetchable) [size=4M]
Memory at e0000000 (64-bit, prefetchable) [size=256M]
I/O ports at e0b0 [size=8]
Expansion ROM at <unassigned> [disabled]
Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [d0] Power Management version 2
Capabilities: [a4] PCI Advanced Features
Kernel driver in use: i915
00:19.0 Ethernet controller: Intel Corporation 82577LM Gigabit Network Connection (rev 06)
Subsystem: Matsushita Electric Industrial Co., Ltd. Device 8338
Flags: bus master, fast devsel, latency 0, IRQ 33
Memory at f4a00000 (32-bit, non-prefetchable) [size=128K]
Memory at f4a29000 (32-bit, non-prefetchable) [size=4K]
I/O ports at e040 [size=32]
Capabilities: [c8] Power Management version 2
Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [e0] PCI Advanced Features
Kernel driver in use: e1000e
00:1a.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 06) (prog-if 20 [EHCI])
Subsystem: Matsushita Electric Industrial Co., Ltd. Device 8338
Flags: bus master, medium devsel, latency 0, IRQ 16
Memory at f4a28000 (32-bit, non-prefetchable) [size=1K]
Capabilities: [50] Power Management version 2
Capabilities: [58] Debug port: BAR=1 offset=00a0
Capabilities: [98] PCI Advanced Features
Kernel driver in use: ehci_hcd
00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 06)
Subsystem: Matsushita Electric Industrial Co., Ltd. Device 8338
Flags: bus master, fast devsel, latency 0, IRQ 22
Memory at f4a20000 (64-bit, non-prefetchable) [size=16K]
Capabilities: [50] Power Management version 2
Capabilities: [60] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
Capabilities: [100] Virtual Channel
Capabilities: [130] Root Complex Link
Kernel driver in use: HDA Intel
00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 06) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: 0000d000-0000dfff
Memory behind bridge: f4800000-f49fffff
Capabilities: [40] Express Root Port (Slot+), MSI 00
Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [90] Subsystem: Matsushita Electric Industrial Co., Ltd. Device 8338
Capabilities: [a0] Power Management version 2
Kernel driver in use: pcieport
00:1c.1 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 2 (rev 06) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=02, subordinate=09, sec-latency=0
I/O behind bridge: 0000c000-0000cfff
Memory behind bridge: f4600000-f47fffff
Prefetchable memory behind bridge: 00000000f4b00000-00000000f4cfffff
Capabilities: [40] Express Root Port (Slot+), MSI 00
Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [90] Subsystem: Matsushita Electric Industrial Co., Ltd. Device 8338
Capabilities: [a0] Power Management version 2
Kernel driver in use: pcieport
00:1c.2 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 3 (rev 06) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=0a, subordinate=0a, sec-latency=0
I/O behind bridge: 0000b000-0000bfff
Memory behind bridge: f4400000-f45fffff
Capabilities: [40] Express Root Port (Slot+), MSI 00
Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [90] Subsystem: Matsushita Electric Industrial Co., Ltd. Device 8338
Capabilities: [a0] Power Management version 2
Kernel driver in use: pcieport
00:1c.3 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 4 (rev 06) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=0b, subordinate=13, sec-latency=0
I/O behind bridge: 00009000-0000afff
Memory behind bridge: f0400000-f43fffff
Capabilities: [40] Express Root Port (Slot+), MSI 00
Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [90] Subsystem: Matsushita Electric Industrial Co., Ltd. Device 8338
Capabilities: [a0] Power Management version 2
Kernel driver in use: pcieport
00:1d.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 06) (prog-if 20 [EHCI])
Subsystem: Matsushita Electric Industrial Co., Ltd. Device 8338
Flags: bus master, medium devsel, latency 0, IRQ 23
Memory at f4a27000 (32-bit, non-prefetchable) [size=1K]
Capabilities: [50] Power Management version 2
Capabilities: [58] Debug port: BAR=1 offset=00a0
Capabilities: [98] PCI Advanced Features
Kernel driver in use: ehci_hcd
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev a6) (prog-if 01 [Subtractive decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=14, subordinate=14, sec-latency=32
Capabilities: [50] Subsystem: Matsushita Electric Industrial Co., Ltd. Device 8338
00:1f.0 ISA bridge: Intel Corporation Mobile 5 Series Chipset LPC Interface Controller (rev 06)
Subsystem: Matsushita Electric Industrial Co., Ltd. Device 8338
Flags: bus master, medium devsel, latency 0
Capabilities: [e0] Vendor Specific Information: Len=10 <?>
00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series Chipset 6 port SATA AHCI Controller (rev 06) (prog-if 01 [AHCI 1.0])
Subsystem: Matsushita Electric Industrial Co., Ltd. Device 8338
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 34
I/O ports at e090 [size=8]
I/O ports at e080 [size=4]
I/O ports at e070 [size=8]
I/O ports at e060 [size=4]
I/O ports at e020 [size=32]
Memory at f4a26000 (32-bit, non-prefetchable) [size=2K]
Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [70] Power Management version 3
Capabilities: [a8] SATA HBA v1.0
Capabilities: [b0] PCI Advanced Features
Kernel driver in use: ahci
00:1f.3 SMBus: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller (rev 06)
Subsystem: Matsushita Electric Industrial Co., Ltd. Device 8338
Flags: medium devsel, IRQ 18
Memory at f4a25000 (64-bit, non-prefetchable) [size=256]
I/O ports at e000 [size=32]
00:1f.6 Signal processing controller: Intel Corporation 5 Series/3400 Series Chipset Thermal Subsystem (rev 06)
Subsystem: Matsushita Electric Industrial Co., Ltd. Device 8338
Flags: bus master, fast devsel, latency 0, IRQ 11
Memory at f4a24000 (64-bit, non-prefetchable) [size=4K]
Capabilities: [50] Power Management version 3
Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit-
0a:00.0 Network controller: Intel Corporation Centrino Advanced-N + WiMAX 6250 (rev 35)
Subsystem: Intel Corporation Centrino Advanced-N + WiMAX 6250 2x2 AGN
Flags: bus master, fast devsel, latency 0, IRQ 36
Memory at f4400000 (64-bit, non-prefetchable) [size=8K]
Capabilities: [c8] Power Management version 3
Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [e0] Express Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting
Capabilities: [140] Device Serial Number 00-23-15-ff-ff-0e-77-d4
Kernel driver in use: iwlagn
0b:00.0 CardBus bridge: Ricoh Co Ltd Device e476
Subsystem: Matsushita Electric Industrial Co., Ltd. Device 8338
Flags: bus master, fast devsel, latency 0, IRQ 19
Memory at f2c01000 (32-bit, non-prefetchable) [size=4K]
Bus: primary=0b, secondary=0c, subordinate=0f, sec-latency=176
Memory window 0: f0400000-f2bff000 (prefetchable)
Memory window 1: f3000000-f33ff000
I/O window 0: 00009000-000090ff
I/O window 1: 00009400-000094ff
16-bit legacy interface ports at 0001
Kernel driver in use: yenta_cardbus
0b:00.1 SD Host controller: Ricoh Co Ltd Device e822 (rev 02) (prog-if 01)
Subsystem: Matsushita Electric Industrial Co., Ltd. Device 8338
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at f2c00000 (32-bit, non-prefetchable) [size=256]
Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [78] Power Management version 3
Capabilities: [80] Express Endpoint, MSI 00
Kernel driver in use: sdhci-pci
3f:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers (rev 02)
Subsystem: Intel Corporation Device 8086
Flags: bus master, fast devsel, latency 0
3f:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 02)
Subsystem: Intel Corporation Device 8086
Flags: bus master, fast devsel, latency 0
3f:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 02)
Subsystem: Intel Corporation Device 8086
Flags: bus master, fast devsel, latency 0
3f:02.1 Host bridge: Intel Corporation Core Processor QPI Physical 0 (rev 02)
Subsystem: Intel Corporation Device 8086
Flags: bus master, fast devsel, latency 0
3f:02.2 Host bridge: Intel Corporation Core Processor Reserved (rev 02)
Subsystem: Intel Corporation Device 8086
Flags: bus master, fast devsel, latency 0
3f:02.3 Host bridge: Intel Corporation Core Processor Reserved (rev 02)
Subsystem: Intel Corporation Device 8086
Flags: bus master, fast devsel, latency 0
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