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

Newegg Daily Deals

Reply
 
Thread Tools
Old 07-20-06, 06:54 PM   #1
madtowner
Registered User
 
Join Date: Jul 2006
Posts: 4
Default 2 nvidia cards, only one fb

I have 2 nvidia cards (GeForce 6600GT PCI express) and would like to write directly to /dev/fb1 to the second monitor. Only one listing is in /proc/fb so the second framebuffer does not work. If I enter "cat /proc/fb" then I get
0 VESA VGA

but the second framebuffer does not show up(expected "32 VESA VGA")

Any ideas on how to set up the second framebuffer?
madtowner is offline   Reply With Quote
Old 07-21-06, 01:52 AM   #2
Thunderbird
 
Join Date: Jul 2002
Location: Netherlands, Europe
Posts: 2,105
Default Re: 2 nvidia cards, only one fb

At system startup only one videocard is actually initialized. Some magic (int10) stuff. This is part of the problem. The second issue is that actually linux doesn't support the stuff you want to do yet. The whole console system is actually targetted at a single user at the moment.

People are trying to fix the problems and improve framebuffer support. The linuxconsole project is woring on this (http://linuxconsole.sourceforge.net/) but I don't know what the status of it is and how usefull it is already.
Thunderbird is offline   Reply With Quote
Old 07-21-06, 08:34 AM   #3
madtowner
Registered User
 
Join Date: Jul 2006
Posts: 4
Default Re: 2 nvidia cards, only one fb

Thanks for the information. Any suggestions on alternative ways to implement my needs? I need to draw bitmaps to the second display. I have no requirements for windows or user input(no mouse, keyboard) with the second display.
madtowner is offline   Reply With Quote
Old 07-21-06, 10:50 AM   #4
Thunderbird
 
Join Date: Jul 2002
Location: Netherlands, Europe
Posts: 2,105
Default Re: 2 nvidia cards, only one fb

You could run a second Xserver for the card. Normally when you run two Xservers but won't be 'on' at the same time because in general only one keyboard/mouse is connected. Because of this when you switch to the second Xserver the first one turns black. These days I believe there's a 'null' or 'void' input driver which you can select. This allows you to run a second Xserver without any input devices which is what you want. By setting the correct DISPLAY variable you can draw things to it.
Thunderbird is offline   Reply With Quote
Old 07-21-06, 11:29 AM   #5
pe1chl
Registered User
 
Join Date: Aug 2003
Posts: 1,026
Default Re: 2 nvidia cards, only one fb

When you just want to have two X screens there is no need to run two servers. A single server can run two separate displays as :0.0 and :0.1 and you can run programs on the second display with DISPLAY=:0.1 without problem with input devices.
pe1chl is offline   Reply With Quote
Old 07-21-06, 12:11 PM   #6
Thunderbird
 
Join Date: Jul 2002
Location: Netherlands, Europe
Posts: 2,105
Default Re: 2 nvidia cards, only one fb

In case of separate X screens you can still reach the second screen by moving the mouse over. In the void way both are 100% separate and they can even be run as a different user.
Thunderbird is offline   Reply With Quote
Old 07-21-06, 03:42 PM   #7
SaTaN0rX
Registered User
 
Join Date: Apr 2005
Posts: 86
Default Re: 2 nvidia cards, only one fb

and there is some evdev input driver, so you can have some real multi-user setup
SaTaN0rX 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Need Help Installing NVIDIA Tesla M2070Q in Linux RHEL5 Ferianto85 NVIDIA Linux 0 05-18-12 08:35 PM
Rumor regarding lack of 680 availability ViN86 Rumor Mill 6 05-09-12 04:48 PM
Triple Head for NVIDIA graphics cards? Lowen Na NVIDIA GeForce 7, 8, And 9 Series 26 08-28-08 01:31 PM
NVIDIA could rule if they really wanted to Vid_craze NVIDIA GeForce 7, 8, And 9 Series 25 08-16-02 05:24 PM

All times are GMT -5. The time now is 06:41 AM.


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