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[Bug 1016724] Re: Laptop brightness always reverts to maximum on 12.04

 

*** This bug is a duplicate of bug 1270579 ***
    https://bugs.launchpad.net/bugs/1270579

** This bug is no longer a duplicate of bug 896595
   Ubuntu does not remember LID brightness
** This bug has been marked a duplicate of bug 1270579
   On laptops, screen brightness isn't memorized between sessions

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https://bugs.launchpad.net/bugs/1016724

Title:
  Laptop brightness always reverts to maximum on 12.04

Status in gnome-settings-daemon package in Ubuntu:
  Confirmed

Bug description:
  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

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