Description of problem: Backlight control on HP Pavilion dv6 3141sl notebook doesn't work using function keys or Gnome power management applet. uname -a Linux TNW513 2.6.40.4-5.fc15.x86_64 #1 SMP Tue Aug 30 14:38:32 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux lsmod Module Size Used by fuse 62381 3 8021q 17170 0 garp 6075 1 8021q stp 1927 1 garp llc 4738 2 garp,stp cpufreq_ondemand 5934 8 acpi_cpufreq 9536 1 mperf 1449 1 acpi_cpufreq ip6t_REJECT 3992 2 nf_conntrack_ipv6 7730 1 nf_defrag_ipv6 9083 1 nf_conntrack_ipv6 ip6table_filter 1655 1 ip6_tables 16908 1 ip6table_filter nf_conntrack_ipv4 8358 1 nf_defrag_ipv4 1513 1 nf_conntrack_ipv4 xt_state 1306 2 nf_conntrack 67613 3 nf_conntrack_ipv6,nf_conntrack_ipv4,xt_state rfcomm 59295 4 bnep 14635 2 arc4 1417 2 snd_hda_codec_hdmi 22499 1 snd_hda_codec_idt 56485 1 ath9k 98147 0 mac80211 247332 1 ath9k ath9k_common 2496 1 ath9k ath9k_hw 271229 2 ath9k,ath9k_common ath 15098 2 ath9k,ath9k_hw snd_hda_intel 23896 2 snd_hda_codec 82508 3 snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_intel snd_hwdep 6328 1 snd_hda_codec snd_seq 52322 0 snd_seq_device 5941 1 snd_seq btusb 14828 2 snd_pcm 78424 3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec cfg80211 148129 3 ath9k,mac80211,ath bluetooth 191587 23 rfcomm,bnep,btusb hp_wmi 8103 0 sparse_keymap 3358 1 hp_wmi rfkill 16436 5 bluetooth,cfg80211,hp_wmi snd_timer 19372 2 snd_seq,snd_pcm snd 63380 13 snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_seq,snd_seq_device,snd_pcm,snd_timer soundcore 6267 1 snd snd_page_alloc 7343 2 snd_hda_intel,snd_pcm uvcvideo 57089 0 videodev 72104 1 uvcvideo media 11611 2 uvcvideo,videodev v4l2_compat_ioctl32 7377 1 videodev hp_accel 14480 0 lis3lv02d 11456 1 hp_accel iTCO_wdt 13000 0 i7core_edac 16001 0 i2c_i801 9237 0 edac_core 40186 3 i7core_edac r8169 38146 0 iTCO_vendor_support 2578 1 iTCO_wdt mii 4335 1 r8169 microcode 18587 0 joydev 9615 0 input_polldev 3382 1 lis3lv02d ipv6 284570 35 ip6t_REJECT,nf_conntrack_ipv6,nf_defrag_ipv6 wmi 9033 1 hp_wmi video 12340 0 radeon 690599 3 ttm 55273 1 radeon drm_kms_helper 26474 1 radeon drm 193923 5 radeon,ttm,drm_kms_helper i2c_algo_bit 4974 1 radeon i2c_core 25712 6 videodev,i2c_i801,radeon,drm_kms_helper,drm,i2c_algo_bit lspci 00:00.0 Host bridge: Intel Corporation Core Processor DMI (rev 11) 00:03.0 PCI bridge: Intel Corporation Core Processor PCI Express Root Port 1 (rev 11) 00:08.0 System peripheral: Intel Corporation Core Processor System Management Registers (rev 11) 00:08.1 System peripheral: Intel Corporation Core Processor Semaphore and Scratchpad Registers (rev 11) 00:08.2 System peripheral: Intel Corporation Core Processor System Control and Status Registers (rev 11) 00:08.3 System peripheral: Intel Corporation Core Processor Miscellaneous Registers (rev 11) 00:10.0 System peripheral: Intel Corporation Core Processor QPI Link (rev 11) 00:10.1 System peripheral: Intel Corporation Core Processor QPI Routing and Protocol Registers (rev 11) 00:16.0 Communication controller: Intel Corporation 5 Series/3400 Series Chipset HECI Controller (rev 06) 00:1a.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05) 00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 05) 00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 05) 00:1c.1 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 2 (rev 05) 00:1d.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05) 00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev a5) 00:1f.0 ISA bridge: Intel Corporation Mobile 5 Series Chipset LPC Interface Controller (rev 05) 00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series Chipset 4 port SATA AHCI Controller (rev 05) 00:1f.3 SMBus: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller (rev 05) 01:00.0 VGA compatible controller: ATI Technologies Inc Madison [AMD Radeon HD 5000M Series] 01:00.1 Audio device: ATI Technologies Inc Redwood HDMI Audio [Radeon HD 5600 Series] 02:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01) 03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 03) 7f:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-Core Registers (rev 04) 7f:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 04) 7f:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 04) 7f:02.1 Host bridge: Intel Corporation Core Processor QPI Physical 0 (rev 04) 7f:03.0 Host bridge: Intel Corporation Core Processor Integrated Memory Controller (rev 04) 7f:03.1 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Target Address Decoder (rev 04) 7f:03.4 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Test Registers (rev 04) 7f:04.0 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 0 Control Registers (rev 04) 7f:04.1 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 0 Address Registers (rev 04) 7f:04.2 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 0 Rank Registers (rev 04) 7f:04.3 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 0 Thermal Control Registers (rev 04) 7f:05.0 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 1 Control Registers (rev 04) 7f:05.1 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 1 Address Registers (rev 04) 7f:05.2 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 1 Rank Registers (rev 04) 7f:05.3 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 1 Thermal Control Registers (rev 04)
What does xbacklight print? And "ls /sys/class/backlight/" Thanks.
Hi, I experience the same issue. The function keys don't change the backlight, neither does the "screen" utility in gnome shell. While using the function keys, the OSD boxes come up and show the slider changing, but backlight doesn't change. This is F16 x86_64. xbacklight prints *nothing* [root@ankur ~]# xbacklight [root@ankur ~]# Here's the output of the ls command: [root@ankur ~]# ls /sys/class/backlight/ -lash total 0 0 drwxr-xr-x. 2 root root 0 Nov 16 2011 . 0 drwxr-xr-x. 48 root root 0 Nov 16 2011 .. 0 lrwxrwxrwx. 1 root root 0 Nov 15 22:47 acpi_video0 -> ../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/backlight/acpi_video0 I'll be happy to provide whatever other info you need Richard. Thanks, Ankur
hi, thanks for the reply: this is: [root@TNW513 ~]# xbacklight bash: xbacklight: command not found... and: [root@TNW513 ~]# ls /sys/class/backlight/ acpi_video0 acpi_video1 thanks, Silvio PS: I resolved with watch -n 1 -t "cat /sys/class/backlight/acpi_video1/brightness > /sys/class/backlight/acpi_video0/brightness" & but I don't like it...
the same here for an pavilion dv6 however. acpi0 is dead in my case and I need to adjust the brightness via the intel branch under backlight. Problem is the above workaround (besides being nasty) doesn't work for me because this expects values up to 4000 something the values in acpi1 are much smaller. Gregor
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