Not possible to change brightness

[rac0701]

Hi everyone,

Recently, I installed Fedora 15 in my Sony VAIO Laptop Series E. Firstly, I had a little problem with nvidia drivers and wireless because I installed from a normal CD, but then I repaired it installing drivers from the web page and updating the system. However, I continue having a problem with changing brightness even with the Fn buttons or with the gnome configuration control. I followed some suggestions as for example these ones http://forums.fedoraforum.org/showthread.php?t=262545, but nothing change. I already tried with xbacklight but still not working. I also did a change in grub conf file (following google search suggestions) adding these commands: acpi_backlight=vendor acpi_osi=Linux, but nothing.

In this moment, my grub.conf file has the following lines:

default=2
timeout=5
splashimage=(hd0,4)/grub/splash.xpm.gz
hiddenmenu
title Fedora (2.6.38.8-35.fc15.x86_64)
root (hd0,4)
kernel /vmlinuz-2.6.38.8-35.fc15.x86_64 ro root=UUID=1fe2a1e3-808b-4885-842e-49d99b220839 rd_NO_LUKS rd_NO_LVM rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=lata rcyrheb-sun16 KEYTABLE=es rhgb quiet acpi_backlight=vendor acpi_osi=Linux
initrd /initramfs-2.6.38.8-35.fc15.x86_64.img
title Fedora (2.6.38.6-26.rc1.fc15.x86_64)
root (hd0,4)
kernel /vmlinuz-2.6.38.6-26.rc1.fc15.x86_64 ro root=UUID=1fe2a1e3-808b-4885-842e-49d99b220839 rd_NO_LUKS rd_NO_LVM rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT= latarcyrheb-sun16 KEYTABLE=es rhgb quiet
initrd /initramfs-2.6.38.6-26.rc1.fc15.x86_64.img
title Windows 7
rootnoverify (hd0,1)
chainloader +1

If it helps with something, here I put what the lspci command returns:

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)
00:16.0 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 04)
00:1b.0 Audio device: Intel Corporation Cougar Point High Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port 1 (rev b4)
00:1c.1 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port 2 (rev b4)
00:1c.3 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port 4 (rev b4)
00:1d.0 USB Controller: Intel Corporation Cougar Point USB Enhanced Host Controller #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation Cougar Point LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation Cougar Point 6 port SATA AHCI Controller (rev 04)
00:1f.3 SMBus: Intel Corporation Cougar Point SMBus Controller (rev 04)
01:00.0 VGA compatible controller: nVidia Corporation Device 1055 (rev a1)
01:00.1 Audio device: nVidia Corporation Device 0e08 (rev a1)
02:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01)
03:00.0 Class ff00: Realtek Semiconductor Co., Ltd. Device 5209 (rev 01)
09:00.0 Ethernet controller: Atheros Communications Device 1083 (rev c0)
-------------------------

... and with lsmod:

Module Size Used by
tcp_lp 2183 0
fuse 62289 3
8021q 18739 0
garp 6087 1 8021q
stp 1951 1 garp
llc 4716 2 garp,stp
cpufreq_ondemand 9466 4
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
sco 16268 2
bnep 14899 2
l2cap 52225 3 bnep
sony_laptop 30270 0
snd_hda_codec_hdmi 22998 1
snd_hda_codec_conexant 50734 1
snd_hda_intel 23660 4
arc4 1457 2
snd_hda_codec 80838 3 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_ intel
snd_hwdep 6368 1 snd_hda_codec
snd_seq 52438 0
snd_seq_device 6001 1 snd_seq
nvidia 11973383 43
snd_pcm 78484 4 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
ath9k 91484 0
mac80211 234498 1 ath9k
ath9k_common 2633 1 ath9k
ath9k_hw 272585 2 ath9k,ath9k_common
ath 14564 2 ath9k,ath9k_hw
cfg80211 135802 3 ath9k,mac80211,ath
btusb 14740 1
uvcvideo 54609 0
bluetooth 91191 8 sco,bnep,l2cap,btusb
videodev 63342 1 uvcvideo
v4l2_compat_ioctl32 6697 1 videodev
wmi 9105 0
microcode 18117 0
atl1c 30962 0
joydev 9651 0
rfkill 16552 5 sony_laptop,bluetooth,cfg80211
snd_timer 19593 2 snd_seq,snd_pcm
i2c_i801 9213 0
iTCO_wdt 11480 0
snd 62670 16 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_ intel,snd_hda_codec,snd_hwdep,snd_seq,snd_seq_devi ce,snd_pcm,snd_timer
soundcore 6299 1 snd
iTCO_vendor_support 2634 1 iTCO_wdt
snd_page_alloc 7431 2 snd_hda_intel,snd_pcm
ipv6 282108 35 ip6t_REJECT,nf_conntrack_ipv6,nf_defrag_ipv6
nouveau 527278 0
ttm 55120 1 nouveau
drm_kms_helper 27515 1 nouveau
drm 187984 3 nouveau,ttm,drm_kms_helper
i2c_algo_bit 5014 1 nouveau
i2c_core 25468 7 videodev,nvidia,i2c_i801,nouveau,drm_kms_helper,dr m,i2c_algo_bit
video 12432 1 nouveau


Any ideas, comments, suggestions, opinions ???

Thanks for your help !!!

Ricardo
RaC

[SomeDamFool]

On my hp laptop since F15 the Fn keys for brightness don't work unless I use it during the bios message just before boot starts. (Found out by accident). If I do that the Fn works once booted. If I don't do it Fn does not work after boot, and no brightness slider is showing in power settings

Seems like F15 won't recognize the backlighting hardware unless it's active (I'm using it) at the beginning of the boot process.
Mike

[rac0701]

Thanks for your answer ... I'll try it ..

Nevertheless, it is strange because when I use Fn keys to change brightness in Fedora 15, a pop-up is displayed and it decrease and increase the brightness level in the bar but no change is produced in the real screen brightness ...

Ill try it and I tell you then ..

Thx!!

Ricardo
RaC

---------- Post added at 10:37 AM ---------- Previous post was at 10:29 AM ----------

Nothing happens ... I clicked many times the Fn keys while booting and no change ... I don't know if I should remove the commands I added to grub.conf file ....

Further ideas ???

[SomeDamFool]

Originally Posted by rac0701

when I use Fn keys to change brightness in Fedora 15, a pop-up is displayed and it decrease and increase the brightness level in the bar but no change is produced in the real screen brightness

The same thing happens for me if I don't get it started before boot. I have to do it during the bios message before boot starts, and I have to do it quick becuase the bios message doesn't last long. Trying it during boot does nothing.

My problem is sometimes it will boot with brightness at minimum. I can't even read the screen and Fn won't work, as well as no slider in power settings. When it happens I have to reboot and do as I described. The screen brightens and when boot starts it is brighter, Fn works after boot, and the slider is present in power settings.
Mike

[rac0701]

OOOkkk ... I really don't understand what happen, but the conclusion is that your solution finally works !!

I removed the options in grub.conf file and clicked some times the keys before the boot screen appears ... Then the brightness Fn keys worked :P ...

Thanks for your help ;-)

Saludos,


Ricardo
RaC

[SomeDamFool]

I don't understand it either, but if it works that's good enough for me