Debian Multimedia :: Dual Monitor: Video Not Working In GNOME?
May 24, 2011
I have an external monitor attached trough a VGA cable to my laptop PC, with the monitor settings shown below. The problem is that when I have the external display connected, video players such as VLC or MPlayer display a black screen instead of the video, with only the sounds working. If I unplug the monitor everything works fine.
Setup Specs:
Dist: Debian Wheezy
Kernel: Linux 2.6.32-5-686
Gnome Version: 2.30.2
Laptop: Asus Eee PC 1000HE (10" LCD screen)
External Monitor: LG Flatron Wide L204WT, 20'' Widescreen LCD Monitor
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Mar 9, 2016
In Debian Jessie Gnome with two screens, I would like to execute
xrandr --output HDMI1 --primary --right-of eDP1
xrandr --output eDP1 --rotate left
prior to showing the GNOME user logon screen. Unfortunately, all information I seem to be able to find on this appears to be relevant for pre-systemd Linux only.
The situation is that I have two monitors: One small tilted monitor on the left with 1024 x 768 which should be secondary and one larger landscape monitor on the right with 1920 x 1080 which should be secondary. Everything works persistently AFTER a user has logged on. However, after booting the system or after changing users, the small monitor becomes primary so (a) the user needs to logon using that monitor and (b) as the monitor is physically tilted, one needs to tilt the head to read it wihtout the xrandr commands.
If I can get beyond this issue, there is a second issue: While one can pick the primary and secondary monitor in Gnome, monitor numbers 1 and 2 seem to be fixed. This becomes a problem when using freeRDP to connect to a Windows server with dual monitors. Then, the smaller, secondary monitor is number 1 and thus, it is the Windows logon and primary screen. Is there a way to switch numbers 1 and 2 in Linux, for example somewhere in the grub configuration?
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Jun 21, 2011
I have an NVIDIA 9800 GTX. I have 2 DELL monitors connect to this card, one is a 24" and the other is 21".
I am unable to use Xinerama mode with Unity, because for some reason after logging in, I get no desktop interface, only background wallpaper, and I have to force reboot.
How can I setup dual monitors in Ubuntu using Unity properly? Note that I do NOT want to use TwinView, since this results in dead space around the smaller monitor.
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Aug 19, 2015
I'm trying to set up a dual monitor system with my Dell E7450 laptop with Debian Stretch and KDE 4.14.2. The graphic card is a Intel HD5500 with xserver-xorg-video-intel version 2:2.99.917-2. The first time I simply connected the HDMI plug, it recognized the monitor and it automagically set up the extended dual monitor. Then I unplugged the HDMI and KDE froze. Now every time I plug in the second monitor the laptop monitor goes black, the desktop goes on the external monitor and the mouse cursor moves only vertically along the leftmost edge of the monitor.
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Feb 18, 2010
Just got a pretty fresh install of Debian/XFCE. Both monitors work out of the box on my 8400GS. I was unable to find an option to change it so I can span is as 1 work space instead of having them mirrored.
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Sep 2, 2015
Just installed Debian 8, coming from Ubuntu12, it seems I cannot get my dual monitors to work as it should.
I want two monitors side by side, currently I have two identical outputs. I looked around a bit and register two possible problems.
root@bigcem101-debian:/home/bigcem101# xrandr
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 640 x 400, current 1024 x 768, maximum 1024 x 768
default connected primary 1024x768+0+0 0mm x 0mm
1024x768 0.00*
800x600 0.00
640x480 0.00
720x400 0.00
Hence, problem 1: it is as if there is only one monitor detected. Then I tried to look for Xorg.conf ..... and: problem 2 xorg.conf is not there. This seems to be normal but when I installed my Ubuntu years ago it was still there and one could manually set things. There must be something new I am missing.
Card:
VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV670 [Radeon HD 3690/3850]
It seems I have both ati and radeon installed.
root@bigcem101-debian:/home/bigcem101# X -configure
(EE)
Fatal server error:
(EE) Server is already active for display 0
I am clueless.
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Jan 29, 2016
I just switched from Ubuntu to Debian and I am having trouble doing something that I found easy to do with Ubuntu. I have a Radeon R9 graphics card from MSI with dual DVI ports and I'm trying to get xrandr/arandr to detect my dual monitors but it only detects one. I've installed all the drivers and even installed the "amdgpu" driver from the Ubuntu repository but still not detecting. What drivers am I missing?
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Mar 9, 2010
I am trying to set up dual monitors for lenny but nosuccess for the moment.
They were working fine for the same setup on ubuntu.
Using xrandr I get:
I read that virtual screen size could be the maximum part which is of no use in comparison to the current size.
So setting a virtual part in my xorg does not help much. If the above is right.
I have:
How to get the external monitor work in the extened screen mode.
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Oct 12, 2015
Pressing left, middle and right button of mouse at bottom and right edges or bottom left, top right and bottom right corners of the screen does not work with fittstool-2.0 on openbox in debian jessie with dual monitor.
Pressing left, middle and right button of mouse at top and left edges and top-left corner on the screen works correctly.
I use openbox on debian jessie. I do not install any desktop environment explicitly.
In the jessie, I installed gcc, make, libglib2.0-0, pkg-config, libcairo2-dev and libxcb1-dev.
I downloaded [URL] .... and confirmed that the sha1sum value of the downloaded file matches sha1sum value given at [URL] ....
I expanded the downloaded file by
Code: Select alltar -xvf fittstool-2.0.tar.gz
into fittstool-2.0 directory.
I executed with an ordinary (non-root) user:
Code: Select allcd fittstool-2.0
make
I executed with root privilege on the fittstool-2.0 directory
Code: Select allmake install
I executed the following with the ordinary user:
Code: Select allfittstool
and ~/.config/fittstool/fittstoolrc was generated.
I modified it as
Code: Select all[TopLeft]
LeftButton=gnome-terminal
MiddleButton=pcmanfm
RightButton=iceweasel
[Code] ....
gives:
Screen 0: minimum 320 x 200, current 2560 x 1024, maximum 8192 x 8192
VGA1 connected 1280x1024+1280+0 (normal left inverted right x axis y axis) 408mm x 306mm
1600x1200 60.00 +
1280x1024 75.02* 60.02
1280x960 75.04 60.00
1152x864 75.00
1024x768 85.00 75.08 70.07 60.00
832x624 74.55
800x600 85.06 72.19 75.00 60.32 56.25
640x480 85.01 75.00 72.81 66.67 60.00
720x400 70.08
HDMI1 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 376mm x 301mm
1280x1024 60.02*+
1280x960 60.00
1152x864 75.00
1024x768 75.08 70.07 60.00
800x600 72.19 75.00 60.32
640x480 75.00 72.81 60.00
720x400 70.08
DP1 disconnected (normal left inverted right x axis y axis)
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May 14, 2010
I'm trying to get dual monitors working on a fresh install of debian from the netinst install cd. I did not allow the installer to download any packages and then manually installed xorg gnome-core & gdm using apt-get.
The monitors are plugged into the onboard vga and dvi ports of my motherboard. I believe the chipset is intel.
At the moment the displays are cloned.
I don't know much about xorg.
This is my xrandr output:
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Dec 28, 2014
I upgraded to jessie today and I am having problems with my background. When I log in, the background tries to start on the external monitor but then it fails to load. I can change the background in settings but it does not show up. The background just becomes black and I am not sure why.
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Oct 20, 2015
i have noticed about 10 desktop crashes since may, because of gnome videos(totem). in particular, when i repeatedly open and close videos, the desktop freeze. should i use another program?
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Mar 15, 2010
I have a Dell XPS M1330, which has a GeForce 8400M GS GPU. The binary (sigh) nVidia driver installed is version 190.53 (installed by sgfxi). This is working well: glxgears gives me about 2600 FPS and compiz is happy.An old Philips 170B is attached by VGA cable. I was looking to set up a method of switching resolution upon connecting to the monitor when working at the desk, since I don't like the 1280x800 resolution of the laptop.
nfortunately, I can't get any output on the external monitor. It does work under Ubuntu, which installed the 180 series binary driver. (Going to an earlier driver is an option, but I want to understand the problem.) Bottom line, I want to work under Debian.As far as I know, nVidia's proprietary driver doesn't support xrandr. At any rate, with he external 170B monitor attached and turned on, I get the following:$ xrandr -qScreen 0: minimum 320 x 175, current 1280 x 800, maximum 1280 x 800default connected 1280x800+0+0 0mm x 0mm
1280x800 50.0*
1024x768 51.0 52.0
960x540 53.0
[code]...
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Jul 4, 2011
I am using lenovo laptop and I have docking system, to extend another monitor on my desk for display.
Laptop 15.6 inch: 1600-900(16:9)
Acer 21 inch : 1920x1080 (16:9)
How to setup in fedora, so I can have both monitor display same screen, with respect of their resolution? When I click "MIrror displays" the resolution gets messed up. I want to use my monitor for the main use and close the lid of the laptop.
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Sep 5, 2011
Y keY is not working.I changed keYboards and its still the same. It works fine in ttY1 for example and shift Y works too. It works fine within things like openarena... But in gnome it does not. I checked binds and stuff, everYthing seems normal and i havent thouched anYthing related. It just does nothing when i press it alone.
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Apr 29, 2011
Just upgraded a dual monitor install of ubuntu from 10.10 to 11.04, reverted to ubuntu-classic (gnome desktop), changed to metacity window manager, but the panel applets (clock, window liet, notifications etc..) only run on ONE of the two screens (:0.0 and :0.1), the other screen they always crash when I try to add them to the panel. how do i get applets to run on BOTH screens at the same time like they used to.
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Feb 7, 2011
Phenom 9500+ quad core, 3GB RAM, Nvidia 8800GT: 260.19.36 driver.Installed the latest Boxee for Linux. Got my remote setup. Everything works except when I open a video it opens in a tiny box in the upper left hand corner of my monitor.Is there any way to get Boxee videos to play full-screen?
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Nov 24, 2010
I have repeatedly installed CentOS 5.5 64-bit on a Dell T3500 with an nVidia Quadro FX 580, in an attempt to get dual monitor support to work to no avail. Everything works fine when just one monitor is plugged in and I do not try to enable or plug in a second monitor. I have installed the Dell DKMS, and the Dell recommended drivers (from Dell site) on one installation, I installed the nVidia drivers (from nVidia site) on another, and have tried with what CentOS loads by default on another. The results are the same every time: When I reboot as directed I get a black screen. I can recover by hard shutdown and unplugging one of the monitors, but that doesn't solve my problem. Has anyone had a similar experience, or have any helpful guidance? I am not very Linux savvy. This is for multiple machines in a corporate environment.
Information for general problems.
== BEGIN uname -rmi ==
2.6.18-194.26.1.el5 x86_64 x86_64
== END uname -rmi ==
== BEGIN rpm -q centos-release ==
centos-release-5-5.el5.centos
== END rpm -q centos-release ==
[Code]...
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May 24, 2011
All of the videos on tennistv are flash. The pre-recorded videos seem to play okay using iceweasel and flashplugin-nonfree but the CPU is very high. When she watches live streamed matches the video stalls and jumps, so I have been trying to figure out why. Tennistv support people say that Linux isn't supported and that streaming is "harder" but don't explain why. They suggested using Google chrome, which did seem to work as well as iceweasel but no better. In desparation I tried XP and it was much better and uses much less CPU.
The only difference I could think of was that flash video hardware acceleration works by default in XP, so I started reading up on Flash video acceleration for linux. The latest Adobe flash player releases appear to support video acceleration, but it's switched off by default. So I upgraded to the latest version and did and then restarted iceweasal if you right click on a flash video you can set hardware acceleration in a tick box, but that seems to be there whether the above is config file is there or not there isn't a live tennis match on again until June 6th. How can I tell if hardware acceleration is actually working or not? The PC is has a 3GHz CPU and 1G RAM. Seems nuts that it can't play video properly. Its a Dell SX280.
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Jan 1, 2010
I have activated dual screen monitors using the Nvidia driver GUI as Sax2 would not correctly configure it. Now at every boot I get the message "undefined video mode 31a, press [enter] for a list of video modes or [space] to continue. After pressing space the system boots to my liking, how can I get rid of the message at every boot up?
I am using Suse 11.2 and KDE4.3.1 My video card is an Nvidia Geforce 7100 GS I thought I was using the Nvidia drivers as I have a GUI from Nvidia in my launch menu if I search "Nvidia" and I have completed the one-click installation. Although when I go into "My Computer" it says driver unknown.
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Aug 30, 2015
Why there is too much error in every version of gnome-shell and after everything slows down after a few hours of working in gnome-shell on debian(only on debian, i'm using gnome-shell in fedora and excellent experience i had in it) some of syslog output :
# tail -f /var/log/syslog
Aug 30 21:20:38 ali-deb gnome-session[8351]: (gnome-shell:8495): GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 30 21:20:38 ali-deb gnome-session[8351]: (gnome-shell:8495): GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 30 21:20:38 ali-deb gnome-session[8351]: (gnome-shell:8495): Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
[Code] .....
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Aug 26, 2011
Is there any way to get libmp3lame to work with ffmpeg without me having to completely recompile ffmpeg? I have managed to get video capture working (huffyuv didn't work for some reason) and this is my command:ffmpeg -f alsa -ac 2 -i hw:0,0 -f x11grab -r 25 -s hd1080 -i :0.0 -vcodec libx264 -vpre lossless_ultrafast -threads 0 -vf 'scale=-1:720' -sameq out.avi
There are so many answers and questions all over the place I can't even tell which package is actually causing the problem... (libmp3lame0? ffmpeg? libavcodec*?)
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Jun 28, 2010
I know there are a lot of dual monitor threads.I've read them, and I even checked at the nvidia forum.I don't see something similar enough to my problem so I'm thinking maybe it's not a driver issue.I'm running F12, both monitors were working and I configured them properly and they were fine.Yesterday I installed the nvidia drivers as per Leigh's tutorial.Once I got that sorted out and rebooted, my secondary monitor was no longer registering.I checked in display settings and it does not recognize the second monitor.I tried going to system->administration->display but after I authenticate nothing happens.
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Apr 27, 2010
Basicaly I want to know what version fo Ubuntu do I use,Intel Q6600 with a nvidia chipset my dam dual monitor isnt working but thats another problem for me to sort out
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Apr 5, 2015
I'm using gnome shell 3.4.2.1 from the stable debian repository. 2 problems with the gnome-tweak-tool:
1) The extensions list is empty, even when the gnome-shell-extensions package is installed
2) in the non-classic mode only, setting made in the tool have no effect: e.g. Shell->Show date in clock does not toggle the date in the clock.
[URL]
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May 5, 2011
Earlier in natty this was working completely. It's only just started happening about a week ago. I don't know what changed, all I know is it suddenly stopped working. Basically the bar at the top is still there but there is black underneath. I can put windows there but I cannot see them (Just black). If I click on an indicator it looks on the bar as if it is being clicked but I cannot see the menu. I have attached a screenshot.
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Aug 17, 2011
I'm using ubuntu 10.04. After update to 2.6.32-34 kernel gnome-system-monitor craches(sometimes freezes) when switching to processes tab.
kernel.log :
Code:
Aug 17 15:14:26 evaliauka kernel: [11308.858611] BUG: unable to handle kernel paging request at fffffff3
Aug 17 15:14:26 evaliauka kernel: [11308.858617] IP: [<c024d582>] vma_stop+0x12/0x30
Aug 17 15:14:26 evaliauka kernel: [11308.858623] *pde = 00855067 *pte = 00000000
Aug 17 15:14:26 evaliauka kernel: [11308.858626] Oops: 0000 [#3] SMP
Aug 17 15:14:26 evaliauka kernel: [11308.858629] last sysfs file: /sys/devices/virtual/net/tun0/statistics/collisions .....
But:
Code:
sudo gnome-system-monitor
works fine and shows all processes (owned by root and by my user evaliauka)
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Jan 5, 2010
I am on kubuntu 9.10 x86_64
I just got my new video card: nvidia 9500 GT to setup dual monitors.
The video card has 2 dvi output to support dual monitors
Monitor 1 is connect to dvi
Monitor 2 is connect to dvi using a vga adaptor
I can't seem to get dual monitor to work?
From system settings -> monitor, i see 2 vid outputs one is DVI0, the other is VGA2. what's odd is i can set up different screen resolution for each monitor, but I only see one desktop, both monitors show the same desktop.
How do i get each monitor to show it's own desktop?
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May 3, 2011
I noticed in the new Ubuntu 11.04 with Unity, when in dual monitor the icon of skype is not placed in the tray when "closed". It is only placed in the background, so that I have to kill the process and open a new one. To be sincere, I see a strange aspect of the entire tray when in dual monitor. Is anyone else noticing the same?
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Jul 31, 2011
I have tried to setup a workstation with 3 monitors on two ati videocards, the goal being to span the desktop across all of them.
The process was not difficult at all, but after login X11 crashes and I am left with a console. I am fortunately able to login in safe mode, but I would like to ask for help in debugging this issue.
Here I will try to give as much detail as possible, starting with my system specifications:
Code:
The first card, the ATI Radeon HD 4650 is capable of running two monitors at the same time. The monitors, for all it matters, are three identical ACER P206HV 20" connected with their analog interface (due to missing cables which I will buy soon). Resolution 1600x900 each. My motherboard is an AsRock 870 Extreme3 mounting an AMD Athlon II X4 640 3 GHz processor and 8 GB of RAM.
When asked by Ubuntu, I installed the ATI Caralyst driver version 11.6 and set it up for using Xinerama.
As I said, this setup works fine if I login in safe mode, but crashes X11 otherwise (even in classical mode - no Unity). By inspecting the logs (attached) I found this (notice the segfault)
Code:
As a test, I tryed to configure Catalyst without Xinerama, an this works, but of course I end up with two separate desktop, which is not what I want. In this mode, xrandr seems to work correctly
Code:
After some research I found that XRandR does not support desktop spanning over multiple GPUs, so Xinerama is the only way to go in my case. Since the two are not compatible with each other, after login in safe mode I see that XRandR is disabled
Code:
One more test consisted in disabling the XRandR module in the config files, as found in some posts: edits in /etc/X11/xorg.conf
Code:
configuring the ati driver:
Code:
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