Go Back   nV News Forums > Linux Support Forums > NVIDIA Linux

Newegg Daily Deals

Reply
 
Thread Tools
Old 09-29-10, 11:32 PM   #1
g4x86
Registered User
 
Join Date: Sep 2010
Posts: 3
Default Problem of NVidia Driver for GeForce 9200 in Fedora 13

In Fedora 13 with the kernel version of 2.6.34.7-56.fc13.x86_64, the NVidia driver of the version 256.53 was installed from rpmfusion repository. Everything works fine except for one problem: the brightness cannot be controlled from the power management programs in either KDE or Gnome. In Gnome, the scroll bar of brightness disappears, and, in KDE, the scroll bar cannot be dragged.

Since the computer with Fedora 13 and NVidia driver installed is Dell Studio One 19 (All-in-One computer) which has no hardware buttons to control screen display options at all, there is no other way to adjust the brightness of computer screen. The BIOS of the computer doesn't include an option to adjust screen brightness either. Since screen brightness is set at the maximum level when the computer is turned on, it is not possible to continue using the computer for a continuous period of time due to eyesight protection.

Strangely enough, both the Nouveau driver included in xorg-x11-drv-nouveau 0.0.16-8.20100423git13c1043 from Xorg 7.4 and the driver included in the mesa-dri-drivers-experimental 7.8.1 support brightness adjustment without any glitches. Moreover the minimum brightness of zero value virtually set the screen to blank, which demonstrates its capability of adjusting the physical brightness of computer monitor, meanwhile the setting of Color Brightness cannot achieve this.

Any clues to fix this Nvidia problem? Thanks a lot!
g4x86 is offline   Reply With Quote
Old 10-18-10, 11:48 PM   #2
g4x86
Registered User
 
Join Date: Sep 2010
Posts: 3
Default Re: Problem of NVidia Driver for GeForce 9200 in Fedora 13

I found a clue of the problem: it probably has something to do with the ACPI function of nVidia driver, because there is no /proc/acpi/video directory at all, while such directory exists when using the default nouveau driver from Xorg. Therefore, the software control of brightness in KDE or Gnome can't work without the function provided by the ACPI interactions between the driver and the kernel.

Any more clues, folks?
g4x86 is offline   Reply With Quote
Old 10-19-10, 07:41 AM   #3
AaronP
NVIDIA Corporation
 
AaronP's Avatar
 
Join Date: Mar 2005
Posts: 2,487
Default Re: Problem of NVidia Driver for GeForce 9200 in Fedora 13

I think those ACPI directories in /proc are provided by video.ko, which is notorious for not working if it's loaded in the wrong order. I can never remember whether nvidia.ko or video.ko needs to be loaded first, but please try changing the load order at bootup.
AaronP is offline   Reply With Quote
Old 10-19-10, 01:08 PM   #4
g4x86
Registered User
 
Join Date: Sep 2010
Posts: 3
Default Re: Problem of NVidia Driver for GeForce 9200 in Fedora 13

I have tested the function of kernel module video.ko by manually loading it and then startx using nvidia driver. Though /proc/acpi/video was created, physical brightness still cannot be controlled in nvidia driver. I even followed the module dependency of nouveau.ko described in the initramfs-2.6.34.7-56.fc13.x86_64.img by all prerequisite modules of nouveau before loading nvidia driver, but still not working.

Then I compared relevant files created by nouveau that were not present when nvidia was loaded:

/sys/devices/pci0000:00/0000:00:10.0/0000:03:00.0/backlight/nv_backlight/brightness
/sys/devices/pci0000:00/0000:00:10.0/0000:03:00.0/backlight/nv_backlight/actual_brightness
/sys/devices/pci0000:00/0000:00:10.0/0000:03:00.0/backlight/nv_backlight/max_brightness

I think they are the kernel settings responsible adjusting physical brightness of screen, so the next step is to figure out how to make nvidia driver to create these setting parameters.

Any ideas for proceeding? Thanks a lot!
g4x86 is offline   Reply With Quote
Old 10-19-10, 01:36 PM   #5
artem
Registered User
 
Join Date: Jun 2006
Posts: 704
Default Re: Problem of NVidia Driver for GeForce 9200 in Fedora 13

Have you tried using gddccontrol? It runs perfectly
artem is offline   Reply With Quote
Old 01-17-11, 09:18 AM   #6
hakre
Registered User
 
Join Date: Jan 2011
Posts: 1
Default Re: Problem of NVidia Driver for GeForce 9200 in Fedora 13

ddccontrol or gddcontrol does not help if it doesn't support your screen. As for a program that has been updated 2006 last time it can turn out for current hardware to not work (as for my laptop). But thanks for the tip, it was a good example for me to learn how to do installation and uninstallation of programs that are not packaged so far.
hakre is offline   Reply With Quote
Reply


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 04:52 AM.


Powered by vBulletin® Version 3.7.1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright 1998 - 2014, nV News.