Public bug reported: 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: ubuntu Importance: Undecided Status: New ** Tags: bot-comment -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1016724 Title: Laptop brightness always reverts to maximum on 12.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1016724/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs