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#1 2011-04-08 12:01:41

m4k5
Member
From: 19°33'40,3"E / 53°35'56,7N
Registered: 2011-04-08
Posts: 8

[SOLVED]Black screen Intel brightness

Hello. This is my first post on this forum. Please bear with us. I use a gtranslator, because I do not speak and write English well.
Arch Linux user I am already a long time and take part in polish forum. Here's my post on this matter: CLICK.

I am forced to use the system (x86_64) with reduced versions of

kernel26 2.6.36.3-2
xorg-server 1.9.3.901-1
xf86-video-intel 2.13.0-4

My graphics card is

00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 09)

The reason is that black screen, who appeared together with kernel26-2.6.37 (for the kernel26-2.6.38).
I have tried other Linux distributions with the same versions of kernel26 to check whether the kernel is actually the cause of the problem. It turns out that YES.
Yesterday on a separate partition I installed Arch with unlocked testing repository. I made complete configuration X(xfce4) and added user to all groups. Unfortunately, I only pre-load system. Log on to shell the user account and the execution startx is already taking place with the black screen. Graphical environment is loaded as if my monitor was only 10% brightness. To see what I'm doing on the desk, I have to watch from a distance of 5-10cm. Black screen appears regardless of whether the KMS is active or inactive.
I join the logs to read: dmesg.log and Xorg.0.log.
How to deal with this problem? Who should I report it?
If you need more information ... please write and I'll try to put them here.

P.S.:"I hope you understood what I wrote, but I know that it was not easy smile "

Last edited by m4k5 (2011-04-13 20:08:19)


ArchLinux x86_64-OpenBox#AcerAspire 7715Z#Pentium(R) Dual-Core x86_64 CPU T4300 @ 2.10GHz, 1024 KB Cache#Mobile 4 Series Chipset Integrated Graphics Controller#AR8132 Fast Ethernet

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#2 2011-04-09 02:09:29

hongy19
Member
From: China
Registered: 2005-04-08
Posts: 77
Website

Re: [SOLVED]Black screen Intel brightness

would you try xbacklight to adjust brightness?

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#3 2011-04-09 02:52:45

ewaller
Administrator
From: Pasadena, CA
Registered: 2009-07-13
Posts: 13,429

Re: [SOLVED]Black screen Intel brightness

Your English is understandable.  Thank you for the effort you made in translation.

Can you tell if the back light for your display is off, or whether it is on at a very low level ?
You might be able to tell in a very dark room.

does your system have a directory:  /sys/class/backlight   ?? If so, look under that directory and subdirectories for a file called brightness

If the file exists, use cat to view the file.  If you can do that, then you can write a new value to the file to change brightness. 

[root@odin ewaller]# cat /sys/class/backlight/acpi_video0/brightness
2
[root@odin ewaller]# echo 10  > /sys/class/backlight/acpi_video0/brightness
[root@odin ewaller]# 

Nothing is too wonderful to be true, if it be consistent with the laws of nature -- Michael Faraday
You assume people are rational and influenced by evidence.  You must not work with the public much. -- Trilby
----
How to Ask Questions the Smart Way

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#4 2011-04-09 08:49:18

m4k5
Member
From: 19°33'40,3"E / 53°35'56,7N
Registered: 2011-04-08
Posts: 8

Re: [SOLVED]Black screen Intel brightness

I am very happy that you were able to understand what I wrote. Thank you for your answers... smile

Here's my result from the stable version of the system:

[m4k5@arch64 ~]$ sudo cat /sys/class/backlight/acpi_video0/brightness
0
[m4k5@arch64 ~]$ sudo ls /sys/class/backlight
acpi_video0

The problem is that the unstable version is so dark I could see only the outlines of the menu when I right click the mouse or touchpad. Unfortunately, letters or icons, I can not see.  I believe the problem lies not in backlight. I can not understand why the versions of kernel26-2.6.37 and kernel26-2.6.38 had to spontaneously manipulate the backlight of my monitor. It's not happened on the version of kernel26-2.6.36 and lower.
It seems that I am alone in this condition, because the others had completely black screen. However, they managed to fix it enabling/disabling KMS.
So some smart people from the polish forum advised me to report this as a bug.
What do you recommend? Do you have any other ideas?

EDIT:
I used xbindeys. xbacklight changes the value 100.000000 to 0.000000, however this has no effect on the brightness of the monitor : (

Last edited by m4k5 (2011-04-09 16:11:19)


ArchLinux x86_64-OpenBox#AcerAspire 7715Z#Pentium(R) Dual-Core x86_64 CPU T4300 @ 2.10GHz, 1024 KB Cache#Mobile 4 Series Chipset Integrated Graphics Controller#AR8132 Fast Ethernet

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#5 2011-04-09 16:39:36

ewaller
Administrator
From: Pasadena, CA
Registered: 2009-07-13
Posts: 13,429

Re: [SOLVED]Black screen Intel brightness

What happens if you try this:

ewaller@odin:~[127] 1002 %su
Password: 
[root@odin ewaller]# echo 10  > /sys/class/backlight/acpi_video0/brightness
[root@odin ewaller]# 

Nothing is too wonderful to be true, if it be consistent with the laws of nature -- Michael Faraday
You assume people are rational and influenced by evidence.  You must not work with the public much. -- Trilby
----
How to Ask Questions the Smart Way

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#6 2011-04-09 18:51:25

m4k5
Member
From: 19°33'40,3"E / 53°35'56,7N
Registered: 2011-04-08
Posts: 8

Re: [SOLVED]Black screen Intel brightness

[m4k5@arch64 ~]$ 1002 %su
bash: 1002: nie znaleziono polecenia

explained: bash: 1002: command not found

[root@arch64 m4k5]# echo 10  > /sys/class/backlight/acpi_video0/brightness
bash: echo: błąd zapisu: Zły argument

explained: bash: echo: write error: Invalid argument
.....and nothing hmm


ArchLinux x86_64-OpenBox#AcerAspire 7715Z#Pentium(R) Dual-Core x86_64 CPU T4300 @ 2.10GHz, 1024 KB Cache#Mobile 4 Series Chipset Integrated Graphics Controller#AR8132 Fast Ethernet

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#7 2011-04-09 19:04:08

skunktrader
Member
From: Brisbane, Australia
Registered: 2010-02-14
Posts: 1,321

Re: [SOLVED]Black screen Intel brightness

Make sure the value you are trying to set it to does not exceed this

cat /sys/class/backlight/acpi_video0/max_brightness

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#8 2011-04-09 20:38:42

m4k5
Member
From: 19°33'40,3"E / 53°35'56,7N
Registered: 2011-04-08
Posts: 8

Re: [SOLVED]Black screen Intel brightness

skunktrader wrote:

Make sure the value you are trying to set it to does not exceed this

of course :]

Today I tried the experiment with GRUB.

kernel ..... i915.modeset=1 acpi_osi=Linux
kernel ..... i915.modeset=1 acpi_osi=!Linux

In both cases the result was a black screen but the desktop is loaded "properly".

kernel ..... i915.modeset=0 acpi_osi=Linux
kernel ..... i915.modeset=0 acpi_osi=!Linux

In both cases I am able to log into the shell of the adjustment increase 1024x768 resolution. After entering the startx environment is not loaded.
Xorg.0.log

[    29.745] (WW) Warning, couldn't open module vesa
[    29.761] (EE) open /dev/fb0: No such file or directory
[    29.761] (EE) Screen(s) found, but none have a usable configuration.
[    29.761] 
Fatal server error:
[    29.761] no screens found

I have not installed vesa because of to low performance(!)

everything.log

Apr  9 14:39:22 localhost kernel: [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored

I think this may be causing the problem. A colleague suggested I update the BIOS. What do you think?

user.log

Apr  9 17:59:12 localhost logger: ACPI group/action undefined: video / DD02

I do not know whether this is important but it interested me smile

If you need a specific log, let me know (?).

Adds a note of the KMS=1

dmesg | grep i915
Command line: root=/dev/sda4 i915.modeset=1
Kernel command line: root=/dev/sda4 i915.modeset=1
i915 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
i915 0000:00:02.0: setting latency timer to 64
i915 0000:00:02.0: irq 43 for MSI/MSI-X
[drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0
dmesg | grep intel
intel_idle: MWAIT substates: 0x2220
intel_idle: does not run on family 6 model 23
agpgart-intel 0000:00:00.0: Intel GM45 Chipset
agpgart-intel 0000:00:00.0: detected gtt size: 2097152K total, 262144K mappable
agpgart-intel 0000:00:00.0: detected 65536K stolen memory
agpgart-intel 0000:00:00.0: AGP aperture is 256M @ 0xc0000000
fb0: inteldrmfb frame buffer device
dmesg | grep agp
Linux agpgart interface v0.103
agpgart-intel 0000:00:00.0: Intel GM45 Chipset
agpgart-intel 0000:00:00.0: detected gtt size: 2097152K total, 262144K mappable
agpgart-intel 0000:00:00.0: detected 65536K stolen memory
agpgart-intel 0000:00:00.0: AGP aperture is 256M @ 0xc0000000
dmesg | grep drm
[drm] Initialized drm 1.1.0 20060810
[drm] Supports vblank timestamp caching Rev 1 (10.10.2010).
[drm] Driver supports precise vblank timestamp query.
fb0: inteldrmfb frame buffer device
drm: registered panic notifier
[drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0

ArchLinux x86_64-OpenBox#AcerAspire 7715Z#Pentium(R) Dual-Core x86_64 CPU T4300 @ 2.10GHz, 1024 KB Cache#Mobile 4 Series Chipset Integrated Graphics Controller#AR8132 Fast Ethernet

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#9 2011-04-11 11:04:08

hongy19
Member
From: China
Registered: 2005-04-08
Posts: 77
Website

Re: [SOLVED]Black screen Intel brightness

it indicates that /dev/fb0 has the problem. Would you try to unload the fb module in xorg.conf

m4k5 wrote:
skunktrader wrote:

Make sure the value you are trying to set it to does not exceed this

of course :]

Xorg.0.log

[    29.745] (WW) Warning, couldn't open module vesa
[    29.761] (EE) open /dev/fb0: No such file or directory
[    29.761] (EE) Screen(s) found, but none have a usable configuration.
[    29.761] 
Fatal server error:
[    29.761] no screens found

I have not installed vesa because of to low performance(!)

Last edited by hongy19 (2011-04-11 11:05:00)

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#10 2011-04-11 12:47:05

m4k5
Member
From: 19°33'40,3"E / 53°35'56,7N
Registered: 2011-04-08
Posts: 8

Re: [SOLVED]Black screen Intel brightness

1] I do not use xorg.conf only xorg.conf.d configs
2] I added an option to GRUB nofb. Effect: black screen, Xorg.0.log is clean.

Today I installed a fresh system again, because kernel26.2.6.38 was moved to the core repository. The effects of write after completing a full system configuration, which I hope will not run in a chroot environment as before.
Greetings smile

EDIT
Unfortunately still the same:
- with KMS - problems with the correct resolution and poor performance
- without KMS - black screen

I am not happy sad

Last edited by m4k5 (2011-04-11 17:02:17)


ArchLinux x86_64-OpenBox#AcerAspire 7715Z#Pentium(R) Dual-Core x86_64 CPU T4300 @ 2.10GHz, 1024 KB Cache#Mobile 4 Series Chipset Integrated Graphics Controller#AR8132 Fast Ethernet

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#11 2011-04-13 17:09:25

Unknown47
Member
Registered: 2011-03-03
Posts: 1

Re: [SOLVED]Black screen Intel brightness

I had the same problem, solved by adding a /etc/rc.local
setpci -s 00:02.0 F4.B=00

To adjust the brightness to add to the kernel line:
acpi_osi=Linux

Sorry for my bad english.


ArchLinux Gnome 3 i686
Acer 5732Z

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#12 2011-04-13 20:07:49

m4k5
Member
From: 19°33'40,3"E / 53°35'56,7N
Registered: 2011-04-08
Posts: 8

Re: [SOLVED]Black screen Intel brightness


ArchLinux x86_64-OpenBox#AcerAspire 7715Z#Pentium(R) Dual-Core x86_64 CPU T4300 @ 2.10GHz, 1024 KB Cache#Mobile 4 Series Chipset Integrated Graphics Controller#AR8132 Fast Ethernet

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