Version: unspecified (using KDE 4.7.3) OS: Linux This occur when : When the computer is not Plugged in alternative Current (when plugged, I can't change the brightness) AND WHEN I go away for a while and the system want to lower the brightness down of my laptop to lower powerconsumption when computer is not use Or when I try to change the brightness with hotkeys, as well as slider of the battery management WHAT HAPPEN The brighntess goes down and up and down and up etc... it shows the brightness control bar but you can't stop it either with hotkeys, nor with the slider of battery management applet. I once had ksysguard on and I saw that the CPU is working at 100%, hence the computer become unusable ....( I have to shut down with the switch...) hence i categorized as a Major Bug Reproducible: Always Steps to Reproduce: Just unplugg my laptop and don't touch it for a small while... Expected Results: Should simply not happen netbook description: Computer width: 32 bits *-core description: Motherboard physical id: 0 *-memory description: System memory physical id: 0 size: 1015MiB *-cpu product: Intel(R) Atom(TM) CPU N450 @ 1.66GHz vendor: Intel Corp. physical id: 1 bus info: cpu@0 version: 6.12.10 serial: 0001-06CA-0000-0000-0000-0000 size: 1667MHz capacity: 1667MHz width: 64 bits capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx x86-64 constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 cx16 xtpr pdcm movbe lahf_lm cpufreq configuration: id=0 *-logicalcpu:0 description: Logical CPU physical id: 0.1 width: 64 bits capabilities: logical *-logicalcpu:1 description: Logical CPU physical id: 0.2 width: 64 bits capabilities: logical *-pci description: Host bridge product: N10 Family DMI Bridge vendor: Intel Corporation physical id: 100 bus info: pci@0000:00:00.0 version: 00 width: 32 bits clock: 33MHz configuration: driver=agpgart-intel resources: irq:0 *-display:0 description: VGA compatible controller product: N10 Family Integrated Graphics Controller vendor: Intel Corporation physical id: 2 bus info: pci@0000:00:02.0 version: 00 width: 32 bits clock: 33MHz capabilities: vga_controller bus_master cap_list rom configuration: driver=i915 latency=0 resources: irq:45 memory:f0300000-f037ffff ioport:18d0(size=8) memory:d0000000-dfffffff memory:f0000000-f00fffff *-display:1 UNCLAIMED description: Display controller product: N10 Family Integrated Graphics Controller vendor: Intel Corporation physical id: 2.1 bus info: pci@0000:00:02.1 version: 00 width: 32 bits clock: 33MHz capabilities: bus_master cap_list configuration: latency=0 resources: memory:f0380000-f03fffff *-multimedia description: Audio device product: N10/ICH 7 Family High Definition Audio Controller vendor: Intel Corporation physical id: 1b bus info: pci@0000:00:1b.0 version: 02 width: 64 bits clock: 33MHz capabilities: bus_master cap_list configuration: driver=HDA Intel latency=0 resources: irq:47 memory:f0400000-f0403fff *-pci:0 description: PCI bridge product: N10/ICH 7 Family PCI Express Port 1 vendor: Intel Corporation physical id: 1c bus info: pci@0000:00:1c.0 version: 02 width: 32 bits clock: 33MHz capabilities: pci normal_decode bus_master cap_list configuration: driver=pcieport resources: irq:40 ioport:5000(size=4096) memory:f0100000-f01fffff ioport:40a00000(size=2097152) *-network description: Wireless interface product: AR9285 Wireless Network Adapter (PCI-Express) vendor: Atheros Communications Inc. physical id: 0 bus info: pci@0000:05:00.0 logical name: wlan0 version: 01 serial: 78:e4:00:50:38:5c width: 64 bits clock: 33MHz capabilities: bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=ath9k driverversion=3.0.0-14-generic firmware=N/A ip=192.168.1.65 latency=0 multicast=yes wireless=IEEE 802.11bgn resources: irq:16 memory:f0100000-f010ffff *-pci:1 description: PCI bridge product: N10/ICH 7 Family PCI Express Port 2 vendor: Intel Corporation physical id: 1c.1 bus info: pci@0000:00:1c.1 version: 02 width: 32 bits clock: 33MHz capabilities: pci normal_decode bus_master cap_list configuration: driver=pcieport resources: irq:41 ioport:4000(size=4096) memory:40600000-407fffff ioport:40800000(size=2097152) *-pci:2 description: PCI bridge product: N10/ICH 7 Family PCI Express Port 3 vendor: Intel Corporation physical id: 1c.2 bus info: pci@0000:00:1c.2 version: 02 width: 32 bits clock: 33MHz capabilities: pci normal_decode bus_master cap_list configuration: driver=pcieport resources: irq:42 ioport:2000(size=4096) memory:f0200000-f02fffff ioport:40400000(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: 00 serial: 00:24:54:74:f0:ca capacity: 100Mbit/s width: 64 bits clock: 33MHz capabilities: bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=sky2 driverversion=1.28 firmware=N/A latency=0 multicast=yes port=twisted pair resources: irq:44 memory:f0200000-f0203fff ioport:2000(size=256) *-pci:3 description: PCI bridge product: N10/ICH 7 Family PCI Express Port 4 vendor: Intel Corporation physical id: 1c.3 bus info: pci@0000:00:1c.3 version: 02 width: 32 bits clock: 33MHz capabilities: pci normal_decode bus_master cap_list configuration: driver=pcieport resources: irq:43 ioport:3000(size=4096) memory:40000000-401fffff ioport:40200000(size=2097152) *-usb:0 description: USB Controller product: N10/ICH 7 Family USB UHCI Controller #1 vendor: Intel Corporation physical id: 1d bus info: pci@0000:00:1d.0 version: 02 width: 32 bits clock: 33MHz capabilities: uhci bus_master configuration: driver=uhci_hcd latency=0 resources: irq:23 ioport:1820(size=32) *-usb:1 description: USB Controller product: N10/ICH 7 Family USB UHCI Controller #2 vendor: Intel Corporation physical id: 1d.1 bus info: pci@0000:00:1d.1 version: 02 width: 32 bits clock: 33MHz capabilities: uhci bus_master configuration: driver=uhci_hcd latency=0 resources: irq:19 ioport:1840(size=32) *-usb:2 description: USB Controller product: N10/ICH 7 Family USB UHCI Controller #3 vendor: Intel Corporation physical id: 1d.2 bus info: pci@0000:00:1d.2 version: 02 width: 32 bits clock: 33MHz capabilities: uhci bus_master configuration: driver=uhci_hcd latency=0 resources: irq:18 ioport:1860(size=32) *-usb:3 description: USB Controller product: N10/ICH 7 Family USB UHCI Controller #4 vendor: Intel Corporation physical id: 1d.3 bus info: pci@0000:00:1d.3 version: 02 width: 32 bits clock: 33MHz capabilities: uhci bus_master configuration: driver=uhci_hcd latency=0 resources: irq:16 ioport:1880(size=32) *-usb:4 description: USB Controller product: N10/ICH 7 Family USB2 EHCI Controller vendor: Intel Corporation physical id: 1d.7 bus info: pci@0000:00:1d.7 version: 02 width: 32 bits clock: 33MHz capabilities: ehci bus_master cap_list configuration: driver=ehci_hcd latency=0 resources: irq:23 memory:f0604000-f06043ff *-pci:4 description: PCI bridge product: 82801 Mobile PCI Bridge vendor: Intel Corporation physical id: 1e bus info: pci@0000:00:1e.0 version: e2 width: 32 bits clock: 33MHz capabilities: pci subtractive_decode bus_master cap_list *-isa description: ISA bridge product: NM10 Family LPC Controller vendor: Intel Corporation physical id: 1f bus info: pci@0000:00:1f.0 version: 02 width: 32 bits clock: 33MHz capabilities: isa bus_master cap_list configuration: latency=0 *-storage description: SATA controller product: N10/ICH7 Family SATA AHCI Controller vendor: Intel Corporation physical id: 1f.2 bus info: pci@0000:00:1f.2 version: 02 width: 32 bits clock: 66MHz capabilities: storage ahci_1.0 bus_master cap_list configuration: driver=ahci latency=0 resources: irq:46 ioport:18e8(size=8) ioport:18dc(size=4) ioport:18e0(size=8) ioport:18d8(size=4) ioport:18c0(size=16) memory:f0604400-f06047ff *-serial UNCLAIMED description: SMBus product: N10/ICH 7 Family SMBus Controller vendor: Intel Corporation physical id: 1f.3 bus info: pci@0000:00:1f.3 version: 02 width: 32 bits clock: 33MHz configuration: latency=0 resources: ioport:18a0(size=32) *-network DISABLED description: Ethernet interface physical id: 1 logical name: usb0 serial: 02:5b:41:9b:2e:14 capabilities: ethernet physical configuration: broadcast=yes driver=cdc_ether driverversion=22-Aug-2005 firmware=CDC Ethernet Device multicast=yes
I can confirm this bug, exactly the same happens with my Samsung NF310 netbook. dmesg shows lots of ACPI: Failed to switch the brightness messages. I can stop the flickering by setting a value manually via console. Doesn't happen with GNOME. KDE-version is 4.7.2, openSUSE 12.1.
same flickering with FN-brighter (or via battery monitor slider), no reaction with FN-darker on a Samsung Chronos 7 notebook
I confirm flickering with FN-"brighter" (or via battery monitor slider), no reaction with FN-"darker" on a Samsung Chronos 7 notebook Linux 3.1.10-1.9-desktop x86_64 KDE: 4.8.2 (4.8.2) "release 494" no hint on message.log
I updated to OpenSuse 12.2 (linux 3.4.6): problem solved, screen brightness can be adjusted as expected with FN keys or slider in the power widget ! (kde 4.9.1 Samsung Chronos 7 notebook)
This is *not* solved! It just occurred here on openSUSE 12.1, KDE 4.9.4. I suspect there is some race between kded services that set the brightness, because pressing the keys to adjust brightness is not always accompanied with display of the brightness level, and with previous versions of KDE attempting to adjust brightness by one step would result in adjusting it twice, once as expected and another time higher or lower at random! This is very annoying and I'm surprised it has persisted for so long. A possible workaround for the "strobe effect" is to kill kded.
This bug appeared to me too, on arch and chakra with KDE 4.9.4 update.
Bug is still present in both KDE 4.9.5 and KDE 4.10 RC2.
Bug present in Arch, KDE 4.9.4 and 4.9.5.... and also 4.10 rc
Similar here with 4.9.5 on Fedora 17, Dell Inspiron 1470
On KDE SC 4.10.0 bug is no longer present.
This bug should be fixed in 4.10.0, can anybody reproduce it?
Setting it as needs info
I cant't confirm or infirm as I can not change the brightness due to a fancy new bug anyway...... For each bug solve two new bugs incoming...
no problems on my Samsung Chronos 7 notebook since Sep2012. Meanwhile I'm running OpenSuse 12.3, Linux 3.7.10-1.1 and KDE 4.10.1
Works fine with Kubuntu 13.04 (KDE 4.10.2).