Backlight control on HP Pavilion dv7 6104eg notebook doesn't work using function keys or Gnome power management applet. I found a patch that should solve the problem: http://www.edgrochowski.com/articles/backlight.htm (haven't tried it myself) uname -a: ----------------------------------------- Linux xxxxxxxxxxxx 2.6.38.6-26.rc1.fc15.x86_64 #1 SMP Mon May 9 20:45:15 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux ----------------------------------------- lsmod: ----------------------------------------- Module Size Used by vfat 8720 1 fat 44848 1 vfat fuse 62289 3 8021q 18723 0 cpufreq_ondemand 9466 8 garp 6087 1 8021q stp 1951 1 garp llc 4716 2 garp,stp acpi_cpufreq 7001 1 freq_table 3963 2 cpufreq_ondemand,acpi_cpufreq mperf 1505 1 acpi_cpufreq ip6t_REJECT 4048 2 nf_conntrack_ipv6 7978 1 nf_defrag_ipv6 9531 1 nf_conntrack_ipv6 ip6table_filter 1695 1 ip6_tables 16850 1 ip6table_filter snd_hda_codec_hdmi 22998 1 snd_hda_codec_idt 56833 1 snd_hda_intel 23694 2 snd_hda_codec 80822 3 snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_intel iwlagn 254115 0 snd_hwdep 6368 1 snd_hda_codec snd_seq 52438 0 snd_seq_device 6001 1 snd_seq iwlcore 144189 1 iwlagn snd_pcm 78484 3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec mac80211 234498 2 iwlagn,iwlcore snd_timer 19593 2 snd_seq,snd_pcm btusb 14708 0 uvcvideo 54609 0 snd 62686 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 cfg80211 135850 3 iwlagn,iwlcore,mac80211 bluetooth 91207 1 btusb soundcore 6299 1 snd videodev 63426 1 uvcvideo hp_wmi 6165 0 snd_page_alloc 7431 2 snd_hda_intel,snd_pcm r8169 35525 0 hp_accel 14504 0 microcode 18117 0 v4l2_compat_ioctl32 6697 1 videodev sparse_keymap 3302 1 hp_wmi xhci_hcd 103447 0 i2c_i801 9213 0 mii 4318 1 r8169 iTCO_wdt 11480 0 lis3lv02d 11480 1 hp_accel rfkill 16552 4 cfg80211,bluetooth,hp_wmi wmi 9105 1 hp_wmi iTCO_vendor_support 2634 1 iTCO_wdt joydev 9635 0 input_polldev 3853 1 lis3lv02d ipv6 282108 27 ip6t_REJECT,nf_conntrack_ipv6,nf_defrag_ipv6 squashfs 39457 2 usb_storage 45615 2 i915 346852 3 radeon 688160 0 ttm 55120 1 radeon drm_kms_helper 27515 2 i915,radeon drm 187984 6 i915,radeon,ttm,drm_kms_helper i2c_algo_bit 5014 2 i915,radeon i2c_core 25468 7 videodev,i2c_i801,i915,radeon,drm_kms_helper,drm,i2c_algo_bit video 12432 1 i915 ----------------------------------------- lspci: ----------------------------------------- 00:00.0 Host bridge: Intel Corporation Sandy Bridge DRAM Controller (rev 09) 00:01.0 PCI bridge: Intel Corporation Sandy Bridge PCI Express Root Port (rev 09) 00:02.0 VGA compatible controller: Intel Corporation Device 0116 (rev 09) 00:16.0 Communication controller: Intel Corporation Cougar Point HECI Controller #1 (rev 04) 00:1a.0 USB Controller: Intel Corporation Cougar Point USB Enhanced Host Controller #2 (rev 05) 00:1b.0 Audio device: Intel Corporation Cougar Point High Definition Audio Controller (rev 05) 00:1c.0 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port 1 (rev b5) 00:1c.1 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port 2 (rev b5) 00:1c.2 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port 3 (rev b5) 00:1c.3 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port 4 (rev b5) 00:1d.0 USB Controller: Intel Corporation Cougar Point USB Enhanced Host Controller #1 (rev 05) 00:1f.0 ISA bridge: Intel Corporation Cougar Point LPC Controller (rev 05) 00:1f.2 SATA controller: Intel Corporation Cougar Point 6 port SATA AHCI Controller (rev 05) 00:1f.3 SMBus: Intel Corporation Cougar Point SMBus Controller (rev 05) 01:00.0 VGA compatible controller: ATI Technologies Inc Device 6740 07:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06) 0d:00.0 Network controller: Intel Corporation Device 008b (rev 34) 13:00.0 Class ff00: Realtek Semiconductor Co., Ltd. Device 5209 (rev 01) 19:00.0 USB Controller: NEC Corporation uPD720200 USB 3.0 Host Controller (rev 04) -----------------------------------------
F15 is at 2.6.40 now. Please try the latest kernel in updates stable.
(In reply to comment #1) > F15 is at 2.6.40 now. Please try the latest kernel in updates stable. That might be worth trying, but the 3.1-rcX kernels in Fedora 16 have some native backlight commits that might help in this area even more.
(In reply to comment #2) > (In reply to comment #1) > > F15 is at 2.6.40 now. Please try the latest kernel in updates stable. > > That might be worth trying, but the 3.1-rcX kernels in Fedora 16 have some > native backlight commits that might help in this area even more. I tried the latest F16 Alpha Live CD (Linux localhost.localdomain 3.0.0-1.fc16.x86_64 #1 SMP Fri Jul 22 16:09:29 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux) but the backlight brightness can't be changed either. Is there any Live CD available with a 3.1-rcX kernel you mentioned? For further information about the hardware please check the bug report on Ubuntu Launchpad.
The f16 Beta live images should ship with 3.1-rc5 (ish). There are also nightly composes here: http://koji.fedoraproject.org/koji/taskinfo?taskID=3342109
(In reply to comment #4) > The f16 Beta live images should ship with 3.1-rc5 (ish). There are also > nightly composes here: > > http://koji.fedoraproject.org/koji/taskinfo?taskID=3342109 Thanks for the link! I tried the nightly build (Linux localhost.localdomain 3.1.0-0.rc4.git0.0.fc16.x86_64 #1 SMP Tue Aug 30 00:00:26 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux) but it still doesn't work. If you need any additional information please tell me.
Could you please attach the output of ls -l /sys/class/backlight ?
(In reply to comment #6) > Could you please attach the output of ls -l /sys/class/backlight ? [root@localhost liveuser]# ls -l /sys/class/backlight total 0 lrwxrwxrwx. 1 root root 0 Sep 13 15:14 acpi_video0 -> ../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/backlight/acpi_video0 lrwxrwxrwx. 1 root root 0 Sep 13 15:14 acpi_video1 -> ../../devices/pci0000:00/0000:00:02.0/backlight/acpi_video1 lrwxrwxrwx. 1 root root 0 Sep 13 15:14 intel_backlight -> ../../devices/pci0000:00/0000:00:02.0/drm/card1/card1-LVDS-1/intel_backlight uname -a: Linux localhost.localdomain 3.1.0-0.rc4.git0.0.fc16.x86_64 #1 SMP Tue Aug 30 00:00:26 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
(In reply to comment #7) > (In reply to comment #6) > > Could you please attach the output of ls -l /sys/class/backlight ? > > [root@localhost liveuser]# ls -l /sys/class/backlight > total 0 > lrwxrwxrwx. 1 root root 0 Sep 13 15:14 acpi_video0 -> > ../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/backlight/acpi_video0 > lrwxrwxrwx. 1 root root 0 Sep 13 15:14 acpi_video1 -> > ../../devices/pci0000:00/0000:00:02.0/backlight/acpi_video1 > lrwxrwxrwx. 1 root root 0 Sep 13 15:14 intel_backlight -> > ../../devices/pci0000:00/0000:00:02.0/drm/card1/card1-LVDS-1/intel_backlight > > uname -a: Linux localhost.localdomain 3.1.0-0.rc4.git0.0.fc16.x86_64 #1 SMP Tue > Aug 30 00:00:26 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux 'cd /sys/class/backlight/intel_backlight/; echo xx >brightness' works fine! It's just the function keys and the Gnome applet that don't work.
I'm going to bet that acpi_video1 works as well. Ok, I know how to fix this, it just involves some typing.
(In reply to comment #9) > I'm going to bet that acpi_video1 works as well. Ok, I know how to fix this, it > just involves some typing. acpi_video0 and acpi_video1 don't work, just intel_backlight.
(In reply to comment #9) > I'm going to bet that acpi_video1 works as well. Ok, I know how to fix this, it > just involves some typing. I have the same problem here. Is there any final solution to this. It doesn't work with the acpi0 or 1 branches Any update here. Gregor
Seeing this too on Fedora 16, HP Pavilion DM4-1060US - the following workaround works: # uname -a Linux hp-dm4 3.1.1-2.fc16.x86_64 #1 SMP Mon Nov 14 15:46:10 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux # echo 4882 > /sys/class/backlight/intel_backlight/brightness # lspci 00:00.0 Host bridge: Intel Corporation Core Processor DRAM Controller (rev 02) 00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02) 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) 00:1f.6 Signal processing controller: Intel Corporation 5 Series/3400 Series Chipset Thermal Subsystem (rev 05) 01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 03) 02:00.0 Network controller: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller (rev 01) ff:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers (rev 02) ff:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 02) ff:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 02) ff:02.1 Host bridge: Intel Corporation Core Processor QPI Physical 0 (rev 02) ff:02.2 Host bridge: Intel Corporation Core Processor Reserved (rev 02) ff:02.3 Host bridge: Intel Corporation Core Processor Reserved (rev 02) # ls -l /sys/class/backlight/ total 0 lrwxrwxrwx 1 root root 0 Nov 22 14:18 acpi_video0 -> ../../devices/pci0000:00/0000:00:02.0/backlight/acpi_video0 lrwxrwxrwx 1 root root 0 Nov 22 14:18 intel_backlight -> ../../devices/pci0000:00/0000:00:02.0/drm/card0/card0-LVDS-1/intel_backlight
Is this still happening with 2.6.43/3.3?
I'm using Linux Mint 12 with kernel 3.4 now and it still doesn't work out of the box. I had to add 'acpi_backlight=vendor' to the kernel parameters as suggested here: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/847187/comments/27
I guess we'll move this to F17. Matthew, did you ever get around to doing that typing you mentioned in comment #9?