CentOS 5 :: Can't Get TwinView/DualHead Display To Work
Jun 4, 2010
I have 32-bit Windows XP and Centos 5.5 x86_64 on my dual-boot PC, equipped with two generic LCD monitors, Dell (primary) and HP (secondary). I have been running dual screen displays without any problem when running Windows, however no luck getting them to work when I boot up with my newly installed Centos 5.5
In both Gnome and KDE both monitors light up, but secondary monitor (HP) is just a clone of the primary. I have tried setting "Dual Head" in the Display adminitrator but the resulting xorg.conf causes a "Entity is already in use" error and crashes. I have also tried just adding Option "TwinView" "on" but it does nothing. (Are "Dual Head" and "Twin View" exactly the same concept?)
What I am doing wrong? I checked the FAQ and did not find any similar problems being discussed.
Below is my getinfo.sh driver info
== BEGIN uname -rmi ==
2.6.18-194.3.1.el5.centos.plusxen x86_64 x86_64
== END uname -rmi ==
== BEGIN rpm -q centos-release ==
[Code]....
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Feb 15, 2010
I frequently watch movies on my computer, but I have two screens. So having something displayed on the other monitor is annoying.
I currently use this to turn off my monitors:
xset dpms force off
I was wondering if there's any way to turn off monitors independently, without having to physically press a button on the monitor, of course.
A program that tells the other monitor to display nothing but black would suffice, but I'd really prefer not to waste the power.
I also have Nvidia TwinView, so applications like grandr aren't aware of both monitors as being independent.
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Dec 15, 2010
I am currently running ubuntu 10.10
I have a panasonic 50" and a samsung 23" both of which are 1080p displays. I have twinview setup so that the samsung is my main and the panasonic plasma is my secondary. For some reason every time I open a windows of lets say mozilla and it was maximized prior to closing before, it will "jump" (briefly display on the samsung monitor for a split second and then automatically move to the plasma) from my main display to the secondary panasonic plasma. If mozilla was minimized before closing prior and I reopen it will open to the samsung in the state it was in on the prior close (aka minimized), which is fine. Only when it was maximized prior does it "jump" to my secondary display.
How can I correct this issue? I would like to have programs open (and stay) in the display they were launched in whether it is the plasma or the samsung.
xorg.conf:
# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings: version 260.19.06 (buildd@yellow) Mon Oct 4 15:59:51 UTC 2010
# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig: version 260.19.06 (buildmeister@builder101) Mon Sep 13 04:59:45 PDT 2010
[Code]....
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Aug 22, 2011
I'm running Ubuntu 11.04, using an nVidia graphics card. I have my TV hooked up to my computer and acting as a second monitor, using the Twinview option with the gpu. My monitor is set as the primary display, with the TV as secondary.
The problem I'm having is that when I turn my computer on, the main display is black, and all the load up information is output to the second display. Then, when I get to the log in screen, it is also on the second display.
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Feb 7, 2009
I am trying to get VNC to work with display 0 on CentOS 5.2.In the past, I had always used the information straight from realvnc,URL... which is straighforward and simple, but this doesn't seem to work with CentOS 5. Once I attempt to connect to the server, it locks up.I have searched around and found the following info for CentOS 5, but I can't get it to work. The info seems very unclear and cumbersome to get display 0 configured.Has anyone gotten the RealVNC method to work on CentOS 5?
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Jun 8, 2009
i didnt find a solution to a display problem im having. my server mobo is an asus k8n-dre with built in video. after the install(using built in video) the screen dosnt display fully as in black sections on the left and top of the screen. from the searching i did i found something about an "xrandr" command that would let me change the video settings but it didnt do anything with the black areas when i tried it. i also have a nvidia geforce 9500gt video card so i changed the jumper to boot from it and tried again. the black sections are still there but the centos display covers much more of the screen now. theres still about a third of an inch gap on the left hand side and about 1/4 of an inch on the top. ive also tried updating the software to see if it may be a driver issue but no luck. anyone know how or if it can fit to full sceen? the screen displays up to 1440x900 if im not mistaken but with the built in video it gave me lots of display options including the 1440x900. after changing to the nvidia card it only shows 800x600 and 640x480.
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Dec 28, 2010
Is it possible to run TwinView with more than 2 monitors.When I try, it seems to recognize the 3rd monitor, but will allow allow them to be configured as separate X screens.
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Jan 17, 2011
I have a GeForce 7200GS graphics card which I've been running in TwinView mode driving 2 IIyama E431S monitors.
I wish to move up to 3 monitors and acquired a USB to VGA adapter but can't get the new monitor to work. I have followed this [URL] and modified the xorg.conf. See below:
Code:
# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig: version 1.0 (buildmeister@builder63) Tue Nov 4 14:07:17 PST 2008
# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings: version 1.0 (buildd@palmer) Mon Nov 3 08:46:46 UTC 2008
[Code]....
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Mar 27, 2010
I have connected my TV (and my regular screen) to my Ubuntu 9.10. I use TwinView, and that works just fine. I have also installed Moovida (I love that program). And I would like my PC to open Moovida on startup, but I need it to be on the TV screen.
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Jun 17, 2010
I have no idea what to do to get Twinview to work. I had found a bit of code to paste into the xorg.conf file but after I pasted it in and restarted my computer, but it wouldn't boot up. Whenever I open up the "Monitors" dialog under System>Preferences, it doesn't even see that the second monitor is there! It doesn't matter if I go to the default tool or if I go to nVidia's tool. On the nVidia tool, under X "Server Display Configuration", there is a button "Configure...", when I press it, it asks "How should this display be configured?". The options "Twinview" and "Disabled" are both unselectable and the only one that I can select is "Separate X Screen". It's almost like my computer doesn't know that I have a second monitor plug.
I am running Ubuntu 10.04.
My xorg.conf:
Code:
Section "Device"
Identifier "nVidia Corporation NV34 [GeForce FX 5200]"
Driver "nvidia"
Option "NvAGP" "1"
[Code]....
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Nov 11, 2010
Recently i've installed 10.10 and have a problem with flickering screen on VGA. I have 64-bit release, ge force 210, nvidia propietary drivers and two monitors:
- AOC_1920*1080_60_DVI
- Philips_1280*1024_75_VGA
- nvidia-current, 260.19.12, 2.6.35-22-generic, x86_64: installed
No matter which monitor is attached to VGA, it flickers randomly every couple of minutes. Sometimes it flickers when i use mouse or keyboard, but sometimes it flickers by itself.
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Feb 4, 2011
Here is my question:
I recently installed Ubuntu 10.10 (32bit) on an HP compaq nc6400 laptop (internal display is 1280x800, graphics card is an Intel Mobile 945GM/GMS, 943/940GML Express) which I am using in three situations: In my office: external monitor (1280x1024), laptop in docking station with lid closed At home/on travel: as it is, without any external monitor When giving lectures: with projector (1024x786), lid open, same output on projector and internal display As you see, I either want one output device only or both showing the same output. Additionally, I want to run compiz. My problem is that, whenever I (1) connect an external display or (2) when I press the Fn+F4 key to change displays or (3) sometimes even when I open/close the laptop's lid, the system at some point switches to TwinView which seems not to work with compiz on my system. The effect is that compiz is deactivated. When I want to have it back, I have to open the appearance settings and change to extra visual effects again. Unfortunately, that reverts compiz to default settings and I have to adjust my compiz settings again. note that compiz works properly in all three situations I listed above. The problem is "only" that, at some point, it switches to TwinView.
Is there a way to tell X or compiz NEVER TO CHANGE TO TWINVIEW?
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Feb 24, 2011
I'm running the latest versions of openSUSE and KDE with latest updates installed. I have an nVidia GTS 250 video card with two monitors hooked up. Initially SUSE recognized my second monitor just fine. However, after installing nVidia's own driver (to quiet the loud noise of the card's fan on high) following these instructions, my monitor is only usable after I go into the nVidia X Server Settings (from terminal, as root: "nvidia-settings") and configure it to TwinView.
All is well and good (I can move windows over to monitor 2), except that monitor 2 has no wallpaper (I'm new to KDE, does this mean that monitor has no desktop activity?) and the X Server configuration is not persistent. When I reboot I have to change the X Server settings back to get monitor 2 recognized again.
I tried looking for the X Server configuration file (xorg.conf, right?), in order to replace it with the edited version, but could not find it.
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Apr 18, 2011
I am having issues maximizing windows/applications on triple monitor setup. I would like to maximize wine, folder explorer, media players, and etc to one screen, instead of across both, which it is currently doing that. Using Separate X [xinerama] + twinview, but I have also tried without xinerama + twinview. When maximizing applications and such, it will only maximizes across both of the monitors in the twinview setup, not the separate X on the left. The separate x has maximizing working to that one screen. I have tried to add xorg tweets, but that's not working, and they are currently in my xorg post below. I had maximizing to one screen working perfectly with dual monitor setup. :S And, I am currently getting an error about " Xlib: extension "RANDR" missing on display ":0.0""
The following Xorgs show the differences, I guess if there is one between maximizing correctly to one screen.
Triple Monitor setup, maximizing across both twinview monitors, not preferred:
Code:
# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings: version 260.19.06 (buildd@yellow) Mon Oct 4 15:59:51 UTC 2010
# nvidia-xconfig: X configuration file generated by nvidia-xconfig
[Code].....
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Jun 28, 2010
Im running a dual monitor setup in gnome, with the closed nvidia drivers in twinview mode. most of the times i want to be able to maximize windows to a single monitor (this is the default behavior in 10.04 lucid i believe), but sometimes i want to span a window on both screens. compiz doesn't allow windows to resized past screenborders, and gdevilspie wasn't able to get past this.
After a lot of googling and toying around i came up with the following sollution, i'm posting it here so other people can enjoy it as well (and i'll be able to find it again after my next install).
I made a script to switch between the streched mode and the doublescreen mode to use it, you'll have to stop the autodetection of the outputs in compiz. this option is found in compiz config settings manager under general settings > display settings or though the gconf-editor in /apps/compiz/general/screen0/options/detect_outputs
This script switches between the two modes, but you need to edit the resolutions of your monitors! (i have a double 1280x1024 setup)
Code:
My way of using this:
1. use the script to switch to the span mode
2. start photo/video edit software
3. work
4. close the software
5. use the script to switch back
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Dec 17, 2010
I am posting this to see if anyone else has had an issue with Vmware Workstation 7.1 using unity mode with a Linux Host. The issue I am having is when I try to move a window from my virtual machine in unity mode the screen crashes and then disappears. Everything seems to work while not in unity mode. I have tried various thing like disabling 3d mode in VMware, disabling various KDE effects. I only have these problems with a dual monitor setup, if I switch to a single monitor everything works just fine.
[Code]....
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Jun 18, 2010
i have some issues running twinview through my laptop and an additional monitor. i currently have the nvidia settings such that the monitor is the primary screen. however, whenever i click full screen in videos or another application, it maximizes in my laptop screen. also - when i maximize videos videos, the screen fills up, but the actual video size doesn't tend to increase (it doesn't stretch to fit). is this an adobe problem? ubuntu 10.04, nvidia driver v195, dell latitude d630 laptop.
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Aug 22, 2010
I have 2 nvidia graphics cards and 3 monitors. One graphicss card is an nvidia 460 and the second one is an nvidia 8400 GS. I'm on Ubuntu lucid 64 bit gnome desktop. I use the nvidia drivers . 2 monitors are connected to the 460 card setup as twinview the last monitor is connected to the 8400 GS set as a separate xscreen.
When I now maximize a window on the 2 monitors which are set as twin view it expands this window gets stretched over both screens. I would like to know how I can set it so that an maximized window get only expands on the current screen in twinview so that I can still move windows from 1 screen to another.
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Jul 1, 2009
I have a dual monitor setup (Twinview), both monitors are connected to my 1xNvidia MSI NX8600GT card...I've been using a 21.6inch HannsG HG216D (herein referred to as HG216D) monitor as my LEFT monitor, and a Dell 1905fp (herein referred to as 1905fp) as my RIGHT monitor.
I recently got rid of the 19inch 1905fp Dell monitor and moved my HG216D to the RIGHT and now I have a new 23inch DELL S2309W (herein referred to as S2309W) on the left. The new S2309W is connected to my computer via DVI cable and is configured Perfectly at it's native 1920x1080 resolution.
However I can't for the life of me get my HG216D back to it's native 1680x1050. The HG216D is connected via VGA cable that is also routed thru a KVM, I realize this means that this monitor can't/won't be auto-configured. However I should be allowed to set it manually right?...
Code:
Won't let me select 1680x1050 for the HG216D resolution, it will only let me select 1440x900 MAX, there is no option for 1680x1050, (See attached: screenshot)
I've tried to manually edit my /etc/X11/xorg.conf, but after hours on end messing with it, I give UP...
Here is my current xorg.conf:
Code:
I am just not sure what I need to change and how to get the second xorg.conf to play nice via a VGA connection?
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Mar 26, 2011
I'm trying to use an external monitor to watch movies on my linux box (kubuntu maverick) but it results always out of sync. TV-out refresh rate is locked as you can see on the image i've attached right here. This is the output of the nvidia-settings query about the variable RefreshRate:
Code:
Attribute 'RefreshRate' (DeepBlue:0.0; display device: CRT-0): 60.02 Hz.
'RefreshRate' is an integer attribute.
'RefreshRate' is a read-only attribute.
'RefreshRate' is display device specific.
[Code]....
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Jun 15, 2011
I tried to installed Centos5.4 version on Dell PC intel corei3 inspiron580s and succeeded but found some issues following below
1 Hardware issue for LAN driver ( Broadcomlink(TM)gigabit ethernet)
2 Display Driver not support and also missing Xorg.config file (i.e ., My Screen Starts from center of screen )
3. What is minimum configuration for centos 5.4 ?
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Jul 22, 2010
I have been working on an IBM thinkpad model t23, installed Ubuntu, that was working good, I was having troubles getting the wireless to work,but it would get online with lan cable. It was telling me that I had some bad sectors in my hard drive, so I pulled the drive to get the info from it, and now, when I reinstalled it, turned it on, it goes through all the motions, but there is no display.
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May 22, 2011
Not sure how to explain it.. if I line up my screen perfectly with the light it absorbs just about enough light to make out the outline of the login screen.. seems like the pixels are setting the right colors but the light in the screen isn't turning on if that is possible. If I enter the GRUB menu and load 2.6.35-28-generic it works fine.. the latest doesn't though... so the question.
1) How do I fix this for the latest version?
- or -
2) How do I auto-load the 2.6.35-28-generic version permanently?
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Sep 19, 2015
I've just completed my first pc build, and installed Ubuntu 8.2. My build was focussed around a legacy Apple Cinema 30" display, which has 2560x1600 @ 60fps resolution. The motherboard - Gigabyte H97N-Wifi - supports that display, although the display drivers are supplied by Intel, and are therefore nonfree. On startup, my display resolution defaults to 1200x800. This is what /var/log/Xorg.0.log says about it:
Code: Select all[snip]
[ 1.830] (II) intel(0): Output VGA1 has no monitor section
[ 1.881] (II) intel(0): Output HDMI1 has no monitor section
[ 1.882] (II) intel(0): Output HDMI2 has no monitor section
[ 1.882] (II) intel(0): Output HDMI3 has no monitor section
[ 1.933] (II) intel(0): EDID for output VGA1
[ 1.986] (II) intel(0): EDID for output HDMI1
[ 1.986] (II) intel(0): Manufacturer: APP Model: 9232 Serial#: 33555281
[code]...
I bumped into a webpage which stated that xrandr does not work with proprietary drivers, and if that's true, I can't get it to change resolution on my screen.
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Jul 13, 2009
I have fedora 10 and I rotated my display upside down using Display settings (I don't know if it is the same thing as system-config-display, I had an icon called Display settings on my panel). It didn't work, my screen became black and now I can't change it back. Can I somehow change it back using terminal only? There's no rotation set in my xorg.conf file, I tried to set different rotation in xorg.conf, but it had no effect.
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Jun 17, 2010
When I click on System Administration Display I get the root pasword entry. I enter the root password and then nothing. I stumbled on another way to set the resolution before but I can't find it now
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Jan 12, 2011
I am trying to set up an unused machine as a web server for my students.
I originaly tried with Redhat 9 and had the same problems. I am using an HP Pentium 4 system with 2 network cards.
1) The built in Realtek RTL8139 configured as eth0.
2) An add in Broadcom BCM5782 Gigabit card that was added I presume when the built in card failed (we have a number of machines like this around the school), configured as eth1.
I did not realize the second card was installed when I had Red hat 9 on the system, but I discovered it after installing centos 5.5. I have tried to configure the system to use DHCP with and without getting the DNS from the provider, and both ways the system complains that there is no connection, check the cable, so it will not activate the device.
When I configure the device to use a fixed IP, I can configure the device, but I can't ping anything on the network other than myself. I suppose it is possible that both network cards have failed, but I get green link lights with both cards, when I connect them to my router, so I am at a loss as to why neither board seems to work. I don't have a spare network card to slide in because the computer takes a special mini card. Is there an easy way to test the board to see if the board is a problem?
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Apr 2, 2009
I upgraded from 5.2 to 5.3 last night. Everything was fine until I rebooted this morning and found the display has gone mad.The screen has gone all shaky - almost like the refresh rate is wrong.I can't even make out enough to see what letters I am typing into the login screen.
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Jul 12, 2009
Ive installed X Window System and GNOME Desktop Environment on my server. I am running CentOS 5.3 btw. Ive installed and tried running it but i get error no display specified. GRRRR. I cant seem to find the file where i can specify a display. Im trying to setup a gui so i access my server via vnc cause im kinda a linux noob.
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Nov 7, 2010
I am trying to edit a postinfo.xsl in my root file dir, and with the command:
frank@linux-avnb:~> sudo gedit
(gedit:14150): Gtk-WARNING **: cannot open display: frank@linux-avnb:~>
I get the following. what am i doing wrong?
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