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[Solved] Backlight turned off (brightness=0)
Posted: 14. Sep 2011, 11:31
by nepoznati
Greetings forum!
So, I have a huge problem: I just finished installing Salix OS on my brand new laptop. I didn't encounter any problems during the installation, but after rebooting, screen brightness is set to 0! I tried with Fn keys but they didn't help... I mean I could see something is happening but couldn't see what. Any way I think it's kernel (Graphic driver) thing because I tried Ubuntu Live CD and the result was the same: backlight turned off!
Maybe this will help:
eMachines E725 with Intel's GMA 4500 integrated graphics!
If there is a way to solve this please help me! I don't want to get stuck with Winblows!
Thank you in advance!
Re: Backlight turned off (brightness=0)
Posted: 14. Sep 2011, 11:41
by thenktor
So the screen turns off right after the lilo boot screen? Or after bootup when X starts?
Re: Backlight turned off (brightness=0)
Posted: 14. Sep 2011, 11:45
by nepoznati
thenktor wrote:So the screen turns off right after the lilo boot screen? Or after bootup when X starts?
I think when X starts, because I can see those letters maybe 15-20 seconds after the LiLo boot screen!
Edit #1:
Screen turns of maybe 5 seconds after the lilo boot screen! The last thing I can read is:
Then the screen blacks out!
I did find a "fix" (if you can call it that)... Anyway, it seems that screen can be turned on with this code:
But I have to run this code after every reboot, sleep, hibernation etc... Plus the brightness is not at 100% it's maybe at 60%!
Can anyone tell me what this code actually does, because I don't understand anything (only "setpci" part
)
Please help me to solve this problem. Thank you!
Re: Backlight turned off (brightness=0)
Posted: 15. Sep 2011, 19:25
by nepoznati
I found out that the problem truly is in the kernel:
https://bugs.launchpad.net/ubuntu/+sour ... bug/752165
I'll just have to wait till this bug is worked out. It only affects Intel's graphics (as far as I know).
Temporary solution:
Can someone tell me how to run this code automatically on system boot?
I'll mark this topic as "Solved".
N.N.
Re: [Solved] Backlight turned off (brightness=0)
Posted: 15. Sep 2011, 20:18
by gapan
You can put it in your /etc/rc.d/rc.local
Re: [Solved] Backlight turned off (brightness=0)
Posted: 15. Sep 2011, 20:53
by nepoznati
gapan wrote:You can put it in your /etc/rc.d/rc.local
Thank you gapan for that info!
Best regards!
Re: [Solved] Backlight turned off (brightness=0)
Posted: 17. Sep 2011, 16:18
by Shador
If you also want your system to run it after suspend/hibernate, you can create an appropriate file in /etc/pm/power.d. Have a look at the pre-installed default files in /usr/lib/pm-utils/power.d/ to get an idea what it should look like.
Re: [Solved] Backlight turned off (brightness=0)
Posted: 17. Sep 2011, 22:32
by nepoznati
Thank you Shador that would be helpful... but I it seems that my installation did not create folder /usr/lib/pm-utils:
Code: Select all
nepoznati[~]# cd /usr/lib
nepoznati[lib]# tree
.
|-- ConsoleKit
| |-- run-seat.d
| | `-- udev-acl.ck -> /lib/udev/udev-acl
| |-- run-session.d
| | `-- pam-foreground-compat.ck
| `-- scripts
| |-- ck-system-restart
| `-- ck-system-stop
|-- linux-boot-probes
| |-- 50mounted-tests
| `-- mounted
| |-- 40grub
| |-- 40grub2
| |-- 50lilo
| `-- 90fallback
|-- os-prober
| `-- newns
|-- os-probes
| |-- 50mounted-tests
| |-- init
| | `-- 10filesystems
| `-- mounted
| |-- 10freedos
| |-- 10qnx
| |-- 20microsoft
| |-- 30utility
| |-- 40lsb
| |-- 70hurd
| |-- 80minix
| |-- 83haiku
| |-- 90linux-distro
| `-- 90solaris
|-- rpm
| |-- fileattrs
| | `-- psdriver.attr
| `-- postscriptdriver.prov
`-- siconv
|-- cp10000
|-- cp10006
|-- cp10007
|-- cp10029
|-- cp10079
|-- cp10081
|-- cp1250
|-- cp1251
|-- cp1252
|-- cp1253
|-- cp1254
|-- cp1255
|-- cp1256
|-- cp1257
|-- cp1258
|-- cp437
|-- cp737
|-- cp775
|-- cp850
|-- cp852
|-- cp855
|-- cp857
|-- cp860
|-- cp861
|-- cp862
|-- cp863
|-- cp864
|-- cp865
|-- cp866
|-- cp869
|-- cp874
|-- iso8859-1
|-- iso8859-10
|-- iso8859-11
|-- iso8859-13
|-- iso8859-14
|-- iso8859-15
|-- iso8859-16
|-- iso8859-2
|-- iso8859-3
|-- iso8859-4
|-- iso8859-5
|-- iso8859-6
|-- iso8859-7
|-- iso8859-8
|-- iso8859-9
|-- koi8-r
`-- koi8-u
Code: Select all
nepoznati[lib]# ls
ConsoleKit linux-boot-probes os-prober os-probes rpm siconv
You see, no /usr/lib/pm-utils/power.d/
Can any of those other scripts help me write a script for running the setpci after suspend?
Thank you again!
Re: [Solved] Backlight turned off (brightness=0)
Posted: 18. Sep 2011, 12:07
by gapan
Look in /usr/lib64
Re: [Solved] Backlight turned off (brightness=0)
Posted: 18. Sep 2011, 13:34
by nepoznati
gapan wrote:Look in /usr/lib64
Yes... it's there! Thank you gapan! When i write this script I'll post it in this thread! Thank you guys you were very helpful!
Until the next time, cheers!