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Whenever I start my laptop the brightness is at maximum. If I turn it
down (I set it to minimum) it returns to maximum if I change user
account. To be clear, it will still be maximum if I then switch back to
the original user account. Very occasionally it has also reset to
maximum when I switch workspace, but I can't recreate this behaviour
consistently so I'm wary of saying it's the same problem.
My expected behaviour is that the brightness level should stay where I
set it, as it did in previous releases. Output of lsb_release -rd, lshw
and lspci are below, in that order.
lsb_release -rd
Description: Ubuntu 12.04 LTS
Release: 12.04
lshw
lappy
description: Portable Computer
product: Inspiron 1545 ()
vendor: Winbond Electronics
serial: F09PXJ1
width: 64 bits
capabilities: smbios-2.4 dmi-2.4 vsyscall32
configuration: boot=normal chassis=portable
uuid=44454C4C-3000-1039-8050-C6C04F584A31
*-core
description: Motherboard
product: 0G437N
vendor: Winbond Electronics
physical id: 0
serial: .F09PXJ1.CN7016699C008K.
*-firmware
description: BIOS
vendor: Winbond Electronics
physical id: 0
version: A10
date: 07/17/2009
size: 64KiB
capacity: 15MiB
capabilities: isa pci pcmcia pnp upgrade shadowing cdboot bootselect
int13floppy720 int5printscreen int9keyboard int14serial int17printer int10video
acpi usb agp smartbattery biosbootspecification netboot
*-cpu
description: CPU
product: Intel(R) Core(TM)2 Duo CPU T6500 @ 2.10GHz
vendor: Intel Corp.
physical id: 400
bus info: cpu@0
slot: Microprocessor
size: 1200MHz
capacity: 2100MHz
width: 64 bits
clock: 200MHz
capabilities: x86-64 fpu fpu_exception wp vme de pse tsc msr pae mce
cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss
ht tm pbe syscall nx constant_tsc arch_perfmon pebs bts rep_good nopl
aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 cx16 xtpr pdcm sse4_1 xsave
lahf_lm cpufreq
configuration: cores=2 enabledcores=2 threads=2
*-cache:0
description: L1 cache
physical id: 700
size: 128KiB
capacity: 128KiB
capabilities: internal write-back data
*-cache:1
description: L2 cache
physical id: 701
size: 2MiB
capacity: 2MiB
clock: 66MHz (15.0ns)
capabilities: pipeline-burst internal varies unified
*-memory
description: System Memory
physical id: 1000
slot: System board or motherboard
size: 4GiB
*-bank:0
description: DIMM DDR Synchronous 800 MHz (1.2 ns)
product: HYMP125S64CP8-S6
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 0
serial: 4261365D
slot: DIMM_A
size: 2GiB
width: 64 bits
clock: 800MHz (1.2ns)
*-bank:1
description: DIMM DDR Synchronous 800 MHz (1.2 ns)
product: HYMP125S64CP8-S6
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 1
serial: 4221396E
slot: DIMM_B
size: 2GiB
width: 64 bits
clock: 800MHz (1.2ns)
*-pci
description: Host bridge
product: Mobile 4 Series Chipset Memory Controller Hub
vendor: Intel Corporation
physical id: 100
bus info: pci@0000:00:00.0
version: 07
width: 32 bits
clock: 33MHz
*-pci:0
description: PCI bridge
product: Mobile 4 Series Chipset PCI Express Graphics Port
vendor: Intel Corporation
physical id: 1
bus info: pci@0000:00:01.0
version: 07
width: 32 bits
clock: 33MHz
capabilities: pci pm msi pciexpress normal_decode bus_master
cap_list
configuration: driver=pcieport
resources: irq:40 ioport:d000(size=4096) memory:f6d00000-f6efffff
ioport:e0000000(size=268435456)
*-display
description: VGA compatible controller
product: RV710 [Mobility Radeon HD 4300 Series]
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 0
bus info: pci@0000:01:00.0
version: 00
width: 32 bits
clock: 33MHz
capabilities: pm pciexpress msi vga_controller bus_master
cap_list rom
configuration: driver=fglrx_pci latency=0
resources: irq:49 memory:e0000000-efffffff
ioport:de00(size=256) memory:f6df0000-f6dfffff memory:f6d00000-f6d1ffff
*-usb:0
description: USB controller
product: 82801I (ICH9 Family) USB UHCI Controller #4
vendor: Intel Corporation
physical id: 1a
bus info: pci@0000:00:1a.0
version: 03
width: 32 bits
clock: 33MHz
capabilities: uhci bus_master cap_list
configuration: driver=uhci_hcd latency=0
resources: irq:20 ioport:6f60(size=32)
*-usb:1
description: USB controller
product: 82801I (ICH9 Family) USB UHCI Controller #5
vendor: Intel Corporation
physical id: 1a.1
bus info: pci@0000:00:1a.1
version: 03
width: 32 bits
clock: 33MHz
capabilities: uhci bus_master cap_list
configuration: driver=uhci_hcd latency=0
resources: irq:21 ioport:6f80(size=32)
*-usb:2
description: USB controller
product: 82801I (ICH9 Family) USB UHCI Controller #6
vendor: Intel Corporation
physical id: 1a.2
bus info: pci@0000:00:1a.2
version: 03
width: 32 bits
clock: 33MHz
capabilities: uhci bus_master cap_list
configuration: driver=uhci_hcd latency=0
resources: irq:22 ioport:6fa0(size=32)
*-usb:3
description: USB controller
product: 82801I (ICH9 Family) USB2 EHCI Controller #2
vendor: Intel Corporation
physical id: 1a.7
bus info: pci@0000:00:1a.7
version: 03
width: 32 bits
clock: 33MHz
capabilities: pm debug ehci bus_master cap_list
configuration: driver=ehci_hcd latency=0
resources: irq:22 memory:fed1c400-fed1c7ff
*-multimedia
description: Audio device
product: 82801I (ICH9 Family) HD Audio Controller
vendor: Intel Corporation
physical id: 1b
bus info: pci@0000:00:1b.0
version: 03
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=snd_hda_intel latency=0
resources: irq:47 memory:f6ffc000-f6ffffff
*-pci:1
description: PCI bridge
product: 82801I (ICH9 Family) PCI Express Port 1
vendor: Intel Corporation
physical id: 1c
bus info: pci@0000:00:1c.0
version: 03
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master
cap_list
configuration: driver=pcieport
resources: irq:41 ioport:3000(size=4096) memory:f0600000-f07fffff
ioport:f0800000(size=2097152)
*-pci:2
description: PCI bridge
product: 82801I (ICH9 Family) PCI Express Port 2
vendor: Intel Corporation
physical id: 1c.1
bus info: pci@0000:00:1c.1
version: 03
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master
cap_list
configuration: driver=pcieport
resources: irq:42 ioport:2000(size=4096) memory:f6c00000-f6cfffff
ioport:f0400000(size=2097152)
*-network
description: Wireless interface
product: WiFi Link 5100
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:0c:00.0
logical name: wlan0
version: 00
serial: 00:24:d6:06:a0:3a
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet
physical wireless
configuration: broadcast=yes driver=iwlwifi
driverversion=3.2.0-24-generic firmware=8.83.5.1 build 33692 ip=192.168.1.2
latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn
resources: irq:48 memory:f6cfe000-f6cfffff
*-pci:3
description: PCI bridge
product: 82801I (ICH9 Family) PCI Express Port 3
vendor: Intel Corporation
physical id: 1c.2
bus info: pci@0000:00:1c.2
version: 03
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master
cap_list
configuration: driver=pcieport
resources: irq:43 ioport:c000(size=4096) memory:f6b00000-f6bfffff
ioport:f0200000(size=2097152)
*-network
description: Ethernet interface
product: 88E8040 PCI-E Fast Ethernet Controller
vendor: Marvell Technology Group Ltd.
physical id: 0
bus info: pci@0000:09:00.0
logical name: eth0
version: 13
serial: 00:25:64:54:79:6c
capacity: 100Mbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet
physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=sky2
driverversion=1.30 firmware=N/A latency=0 link=no multicast=yes port=twisted
pair
resources: irq:46 memory:f6bfc000-f6bfffff ioport:ce00(size=256)
*-pci:4
description: PCI bridge
product: 82801I (ICH9 Family) PCI Express Port 5
vendor: Intel Corporation
physical id: 1c.4
bus info: pci@0000:00:1c.4
version: 03
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master
cap_list
configuration: driver=pcieport
resources: irq:44 ioport:b000(size=4096) memory:f6800000-f6afffff
ioport:f0000000(size=2097152)
*-usb:4
description: USB controller
product: 82801I (ICH9 Family) USB UHCI Controller #1
vendor: Intel Corporation
physical id: 1d
bus info: pci@0000:00:1d.0
version: 03
width: 32 bits
clock: 33MHz
capabilities: uhci bus_master cap_list
configuration: driver=uhci_hcd latency=0
resources: irq:20 ioport:6f00(size=32)
*-usb:5
description: USB controller
product: 82801I (ICH9 Family) USB UHCI Controller #2
vendor: Intel Corporation
physical id: 1d.1
bus info: pci@0000:00:1d.1
version: 03
width: 32 bits
clock: 33MHz
capabilities: uhci bus_master cap_list
configuration: driver=uhci_hcd latency=0
resources: irq:21 ioport:6f20(size=32)
*-usb:6
description: USB controller
product: 82801I (ICH9 Family) USB UHCI Controller #3
vendor: Intel Corporation
physical id: 1d.2
bus info: pci@0000:00:1d.2
version: 03
width: 32 bits
clock: 33MHz
capabilities: uhci bus_master cap_list
configuration: driver=uhci_hcd latency=0
resources: irq:22 ioport:6f40(size=32)
*-usb:7
description: USB controller
product: 82801I (ICH9 Family) USB2 EHCI Controller #1
vendor: Intel Corporation
physical id: 1d.7
bus info: pci@0000:00:1d.7
version: 03
width: 32 bits
clock: 33MHz
capabilities: pm debug ehci bus_master cap_list
configuration: driver=ehci_hcd latency=0
resources: irq:20 memory:fed1c000-fed1c3ff
*-pci:5
description: PCI bridge
product: 82801 Mobile PCI Bridge
vendor: Intel Corporation
physical id: 1e
bus info: pci@0000:00:1e.0
version: 93
width: 32 bits
clock: 33MHz
capabilities: pci subtractive_decode bus_master cap_list
*-isa
description: ISA bridge
product: ICH9M LPC Interface Controller
vendor: Intel Corporation
physical id: 1f
bus info: pci@0000:00:1f.0
version: 03
width: 32 bits
clock: 33MHz
capabilities: isa bus_master cap_list
configuration: latency=0
*-storage
description: SATA controller
product: 82801IBM/IEM (ICH9M/ICH9M-E) 4 port SATA Controller [AHCI
mode]
vendor: Intel Corporation
physical id: 1f.2
bus info: pci@0000:00:1f.2
logical name: scsi0
logical name: scsi1
version: 03
width: 32 bits
clock: 66MHz
capabilities: storage msi pm ahci_1.0 bus_master cap_list emulated
configuration: driver=ahci latency=0
resources: irq:45 ioport:6e70(size=8) ioport:6e78(size=4)
ioport:6e80(size=8) ioport:6e88(size=4) ioport:6ea0(size=32)
memory:fed1c800-fed1cfff
*-disk
description: ATA Disk
product: SAMSUNG HM500JI
physical id: 0
bus info: scsi@0:0.0.0
logical name: /dev/sda
version: 2AC1
serial: S1YMJD0S625692
size: 465GiB (500GB)
capabilities: partitioned partitioned:dos
configuration: ansiversion=5 signature=000ab13d
*-volume:0
description: EXT4 volume
vendor: Linux
physical id: 1
bus info: scsi@0:0.0.0,1
logical name: /dev/sda1
logical name: /
version: 1.0
serial: ee0dd2df-d46c-4b10-8bfe-3872ed7bd5c5
size: 461GiB
capacity: 461GiB
capabilities: primary bootable journaled extended_attributes
large_files huge_files dir_nlink recover extents ext4 ext2 initialized
configuration: created=2012-04-29 21:17:53 filesystem=ext4
lastmountpoint=/ modified=2012-04-29 22:21:36 mount.fstype=ext4
mount.options=rw,relatime,errors=remount-ro,user_xattr,barrier=1,data=ordered
mounted=2012-06-13 19:45:03 state=mounted
*-volume:1
description: Extended partition
physical id: 2
bus info: scsi@0:0.0.0,2
logical name: /dev/sda2
size: 4091MiB
capacity: 4091MiB
capabilities: primary extended partitioned
partitioned:extended
*-logicalvolume
description: Linux swap / Solaris partition
physical id: 5
logical name: /dev/sda5
capacity: 4091MiB
capabilities: nofs
*-cdrom
description: DVD-RAM writer
product: DVD+-RW GT10N
vendor: HL-DT-ST
physical id: 1
bus info: scsi@1:0.0.0
logical name: /dev/cdrom
logical name: /dev/cdrw
logical name: /dev/dvd
logical name: /dev/dvdrw
logical name: /dev/sr0
version: A107
capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
configuration: ansiversion=5 status=nodisc
*-serial UNCLAIMED
description: SMBus
product: 82801I (ICH9 Family) SMBus Controller
vendor: Intel Corporation
physical id: 1f.3
bus info: pci@0000:00:1f.3
version: 03
width: 64 bits
clock: 33MHz
configuration: latency=0
resources: memory:f6ffbf00-f6ffbfff ioport:1100(size=32)
*-battery
product: DELL Y823G98
vendor: SMP
physical id: 1
slot: Sys. Battery Bay
capacity: 44000mWh
configuration: voltage=11.1V
And lspci:
00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory
Controller Hub (rev 07)
00:01.0 PCI bridge: Intel Corporation Mobile 4 Series Chipset PCI Express
Graphics Port (rev 07)
00:1a.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI
Controller #4 (rev 03)
00:1a.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI
Controller #5 (rev 03)
00:1a.2 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI
Controller #6 (rev 03)
00:1a.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI
Controller #2 (rev 03)
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio
Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1
(rev 03)
00:1c.1 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 2
(rev 03)
00:1c.2 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 3
(rev 03)
00:1c.4 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 5
(rev 03)
00:1d.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI
Controller #1 (rev 03)
00:1d.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI
Controller #2 (rev 03)
00:1d.2 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI
Controller #3 (rev 03)
00:1d.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI
Controller #1 (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 93)
00:1f.0 ISA bridge: Intel Corporation ICH9M LPC Interface Controller (rev 03)
00:1f.2 SATA controller: Intel Corporation 82801IBM/IEM (ICH9M/ICH9M-E) 4 port
SATA Controller [AHCI mode] (rev 03)
00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 03)
01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI RV710
[Mobility Radeon HD 4300 Series]
09:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8040 PCI-E Fast
Ethernet Controller (rev 13)
0c:00.0 Network controller: Intel Corporation WiFi Link 5100
** Affects: gnome-settings-daemon (Ubuntu)
Importance: Medium
Status: Confirmed
** Tags: bot-comment kernel-bug-exists-upstream precise regression-release
--
Laptop brightness always reverts to maximum on 12.04
https://bugs.launchpad.net/bugs/1016724
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