Debian Hardware :: External Monitor Not Detected
Oct 20, 2015
My system can't seem to detect the external monitor that I've plugged into my laptop using and HDMI cable. The monitor works when I'm booted into Windows so I know that it isn't a problem with the monitor or the cable.
When I run xrandr I get.
Code: Select allScreen 0: minimum 320 x 200, current 1600 x 900, maximum 8192 x 8192
LVDS1 connected primary 1600x900+0+0 (normal left inverted right x axis y axis) 310mm x 174mm
  1600x900   60.00*+ 39.99Â
  1440x900   59.89Â
  1360x768   59.80  59.96Â
  1152x864   60.00Â
  1024x768   60.00Â
  800x600    60.32  56.25Â
  640x480    59.94Â
VGA1 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
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Aug 17, 2011
My software and hardware information are as follows. I have Fedora 12 and KDE 4.4.5 installed on a Dell Vostro 1500 laptop. I believe it's a 64 bit processor; it's an Intel Core 2 Duo CPU. The external monitor is a Dell as well.
My problem is that my system does not seem to be detecting an external monitor that I have connected. Everything else is working just fine; however, I would like to have the option of attaching an external monitor. When I plug the external monitor into the laptop, the external monitor remains black and appears to be in power save mode. The results of xrandr -q (with or without the external monitor attached: it doesn't appear to change) are as follows.
Code:
How can I get my laptop to recognize that the external monitor is even connected? Let me know if I can be more specific or provide additional details.
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Sep 22, 2010
I recently installed Debian, using the amd64 Network Install .iso. I'm using XFCE4 as my desktop environment, and everything is working well... on my laptop's screen.
My desired setup is to have my laptop sitting on a well-ventilated shelf, closed, and to have an external monitor be my main monitor. I want this because I'm using my laptop as my "home" computer, so it never moves, and I don't like the keyboard/trackpad. My laptop has a VGA output, and I can get my desired setup on my Windows partition (not stating a preference ; just that the hardware CAN do what I want it to).
I've been working my way around the Internet for a few days, now, and I've got the commercial NVIDIA driver installed. If I run sudo nvidia-config --twinview I can get my external monitor to be part of the display, which is great, but it's part of a dual-screen monitor setup, which is not what I want at all, because (a) XFCE's multiple virtual desktops are good enough for me and (b) my graphics card is integrated, and I'm trying to squeeze every drop of performance out of my laptop that I can (1 gig of RAM; the less that my graphics card eats into it, the better). Plus, it'd be annoying to accidentally drop something on my laptop's screen, and then have to dig it out of the shelf in order to undo it. I'm not saying that I'm consistently clumsy, but I'd eventually end up doing it.
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Feb 19, 2009
I install the debian on my PC, but the monitor is not detected or not adapted ( while it is for linux CD live, and windows XP). it gives the following errors :
I want to use the file xorg.conf given by CDlive ( sidux for example) and copy it in the /etc/X11 of my debian, is it enougn or I need ohter configuration ?
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Sep 29, 2015
Today I set up the energy settings like that:
10 minutes (screen), 20 minutes for suspension.
After around 30 minutes, I came back and switched back on the pc.
The primary monitor (VGA) was not detected, even after a system reboot.
More info about my pc:
Debian stable 8.2, kernel 3.16.0-4-686-pae.
I have an Nvidia card, but currently I am using nouveau drivers.
Two monitors: VGA (primary) and DVI (secondary).
Later I could get my primary monitor to work by switching tty (ctrl+alt+f3 and typing "startx" in the console).
I guess this is related to Xorg configuration (/etc/X11/xorg.conf is empty), but I am not really sure.
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Nov 13, 2015
I noticed that Debian 8 has a significant bug related to detecting presence of display(s). Today, I woke my computer from sleep while the LCD monitor was unplugged from power (the monitor is connected via DVI) then I powered the monitor but nothing was displayed. Next, I connected another monitor via HDMI and both screens started working. However after disconnecting HDMI cable from the second monitor the first one with DVI stopped showing anything. The conclusion of this situation is that HDMI monitor must be connected all the time.
I thought that this is caused by graphics driver, but I experienced the problem on different machines, one with nvidia driver and DVI, and the second with default free driver and DisplayPort.
I just checked that this is related to KDE. After switching to console using ctrl+alt+f1 the screen turns on, but when I am going back via ctrl+alt+f7 the screen disappears.
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Aug 16, 2015
Setup:
I'm using i386 Jessie Debian, have an i7 Intel processor and Gtx 745 4gb NVidia GPU.
I am running with nomodeset due to blurring issue but issue occured without nomodeset too.
Problem:
When I start Debian with just a monitor in the HDMI slot it doesn't recognize the monitor and keeps the monitor at 1024x768.
When I start Debian with monitor in both DVI and HDMI slot it only activates the DVI monitor (with proper resolution). PC has no VGA I have no DP cable.
xrandr:
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 640 x 480, current 1920 x 1080, maximum 1920 x 1080
default connected primary 1920x1080+0+0 0mm x 0mm
1920x1080 0.00*
1280x1024 0.00
1024x768 0.00
800x600 0.00
640x480 0.00
Which is my dvi monitor, no other screens detected. Is there any way to get the HDMI to run properly?
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Jul 30, 2015
I've recently installed Debian v8.1 and installed Nvidia driver 340.46. In nvidia-settings I am able to enable my second monitor and enable it/set it's position..etc. My second monitor is not being detected in Debian Display and is 'on' but only showing a black screen. I've tried researching and implementing various 'fixes', but I'm not having any luck.
I'm running dual GTX 570's with a monitor plugged into one each (DVI). I noticed in my xorg.conf under Section "Screen" I have an option "MultiGPU" "Off"; would this be part of the issue?
I've tried:
- purging all nvidia drivers and re-installing
- installing different versions of nvidia drivers
- add nomodeset in grub
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Aug 4, 2015
I am reporting two problems that could be related to each other. They have something to do with USB devices upon passing through the ACPI S3 sleep-resume cycle. The hardware is Thinkpad T450s, with Debian 8 64-bit edition. Kernel is provided by either the stock linux-image-3.16.0-4-amd64 or Liquorix's linux-image-4.1-3.dmz.1-liquorix-amd64 . For this case, it does not matter; the problem exists in both versions.
I have an external USB hub which has a USB keyboard receiver (for Microsoft wireless keyboard/mouse combo) attached to the hub. I then usually attach this hub to the laptop.
FIRST: The main problem is that the USB hub was not going to be re-detected upon resumption from sleep. Here is the sequence of events, in brief:
* Laptop was resumed from S3 sleep
* USB hub was attached to the laptop (has external keyboard receiver attached to the hub)--both were detected & working properly
* Laptop was put to S3 sleep
* Laptop was resumed from S3 sleep, both hub and external keyboard were not detected, the syslog says "USB disconnect" to that particular device.
Note that during all the actions above, the laptop is running by external AC power.
SECOND: I also found that the USB hub, if inserted while the laptop was asleep (before resumed), it would not get detected. `lsusb` turns nothing for that device, as if nothing was inserted in the laptop's USB port.
THIRD: I did an experiment this way: instead of putting keyboard receiver on the hub, I attached it to the laptop directly. Hub is still attached elsewhere on the laptop as well. In this way, the keyboard receiver is not malfunctioning after resume. But I found out that the keyboard receiver is behaving funny after resumption. It went to a kind of "very low power" state a lot when idling (not receiving keystroke/mouse movement) for more than about 3 seconds. This causes the external keyboard response to be sluggish, since the receiver has to be turned on back to "active" state before able to responsively receive keystrokes properly again. And this causes a lot of lost keystrokes.
In the second case, the sequence of events are like this:
* Laptop was resumed from S3 sleep
* USB hub was attached to the laptop; it is working
* External keyboard receiver was attached to the laptop; it is working
* Laptop was put to S3 sleep
* Laptop was resumed from S3 sleep, the hub was not detected anymore; the syslog says "USB disconnect" to that particular device. The external keyboard was re-detected, but now is running in a funny power state described above.
These issues did not exist when I use a different laptop running Debian 7/oldstable (wheezy).
Here's the lsusb output before sleep (after the USB hub was attached the laptop):
Code: Select all  ~ $ lsusb
  Bus 003 Device 002: ID 8087:8001 Intel Corp.
  Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
  Bus 001 Device 004: ID 5986:0366 Acer, Inc
  Bus 001 Device 003: ID 8087:0a2a Intel Corp.
  Bus 001 Device 008: ID 045e:071d Microsoft Corp.
  Bus 001 Device 007: ID 1a40:0101 Terminus Technology Inc. 4-Port HUB
  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Now to back to sleep, then resume. This is what comes up:
Code: Select all  $ lsusb
  Bus 003 Device 002: ID 8087:8001 Intel Corp.
  Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
  Bus 001 Device 004: ID 5986:0366 Acer, Inc
  Bus 001 Device 003: ID 8087:0a2a Intel Corp.
  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Devices (045e:071d and 1a40:0101) were not detected again!
I included below excerpts of syslog to show the effect of sleep/resume to the USB devices. I munged it from the full syslog using this command:
Code: Select all  grep -i -e usb -e "systemd.*(suspend|sleep|resum)" -e "pm:" syslog| killutf8 > syslog.usb-only
Syslog events (for FIRST case above):
Code: Select all # [SLEEP1]
  Aug 4 11:57:28 wirawan2 kernel: PM: Syncing filesystems ... done.
  Aug 4 11:57:28 wirawan2 kernel: PM: suspend of devices complete after 701.491 msecs
  Aug 4 11:57:28 wirawan2 kernel: PM: late suspend of devices complete after 11.036 msecs
  Aug 4 11:57:28 wirawan2 kernel: PM: noirq suspend of devices complete after 14.231 msecs
  Aug 4 11:57:28 wirawan2 kernel: PM: Saving platform NVS memory
 # [RESUME1]
[Code] ....
I found several postings on the web similar to this, e.g. [URL] .... and see the references therein. But I don't think the problem is the same as mine. In particular, only external USB hub gives me problem like this (as well as the keyboard receiver, to a lesser extent)..
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Jul 8, 2011
I recently got a new external monitor for my laptop, and connected them by VGA. This is what 'xrandr' tells me:
Screen 0: minimum 320 x 200, current 1440 x 900, maximum 4096 x 4096
LVDS1 connected (normal left inverted right x axis y axis)
1280x800 60.0 +
1024x768 60.0
800x600 60.3 56.2
640x480 59.9
VGA1 connected 1440x900+0+0 (normal left inverted right x axis y axis) 510mm x 290mm
1920x1080 60.0 +
1600x1200 60.0
1680x1050 60.0
1280x1024 75.0 60.0
1440x900 75.0 59.9*
1280x960 60.0
1280x800 59.8
1152x864 75.0
1024x768 75.1 70.1 60.0
832x624 74.6
800x600 72.2 75.0 60.3 56.2
640x480 72.8 75.0 66.7 60.0
720x400 70.1
However when I try to change to some of the higher resolutions, such as 1920x1080, all I get is a corrupted and flickering image. As indicated above, I am currently on 1440x900@59.9h,z but for some reason 1440x900@75hz doesn't work. The same seems to be true for 1280x1024. The three resolutions above that all cannot be selected properly. I tried setting the resolution to maximum in Windows XP and it worked, and my video games console can set it to 1080p, so I don't think there is anything wrong with the monitor. Is there anything I can do or is this some kind of bug or limitation of the graphics driver or something? The graphics chipset of the laptop is an Intel 945GM, which I believe should be capable of displaying 1920x1080. I am running debian unstable with what seems to be the most up to date version of xserver-xorg-video-intel.
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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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Jun 30, 2014
Ok so I just installed Debian 7.5 on my laptop and encountered several problems.
First off was the problem with GNOME 3, GNOME 3 failed to load.
Second problem was that the system does not recognize an external monitor via hdmi. Via VGA I do not know do not have a cable to try it out.
Third problem was that my wireless was no recognized.
Dell Inspiron 5537 Laptop
wireless: Network controller: Atheros Communications Inc. AR9565 Wireless Network Adapter (rev 01)
Graphics card: VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 09) from the 4xxx series
System: 3.2.0-4-amd64 #1 SMP Debian 3.2.57-3+deb7u2 x86_64 GNU/Linux
Before I had Fedora, but only cuz all the devices were recognized by default, for a while now I wanted to switch over to Debian but as I came to relize my hardware for some reason is not working.
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Feb 19, 2016
I'm using Jessie 8.3 on Dell laptop Latitude E7240.
Now when I plug the laptop in the Dell eDock docking station, external monitor connected through DisplayPort and it is detected (according to xrandr output).
BUT nothing shows on the monitor (it stays black) and I get errors repeating in the kernel log:
[ 71.064428] [drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting.
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Mar 28, 2016
I am running Debian 8.3, and I'm running Gnome 3.14.1.I have an external monitor plugged in with HDMI, and while Linux is loading both screens are on duplicate. Once the GUI kicks in, only the external screen works, so I have to enter my password blindly. Then, I open a terminal and run
Code: Select allsudo echo 950 > /sys/class/backlight/intel_backlight/brightness
and the laptop screen turns back on.
I'm wondering: Is there a way to streamline this so that it happens on boot, but after GNOME loads?Or: Is there a better method to solve this?
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Oct 15, 2015
My laptop has a dual boot Debian + Ubuntu installation.
In particular I am using Debian 8.0 with stock kernel 3.16.0-4 (or equally 4.1.10 custom compiled, I tested it and it does not make any difference for the subject of this post).
Ubuntu is 14.10, with stock kernel 3.19.0-15.
In both installations I have nvidia nouveau drivers and intel integrated graphics drivers installed and loaded. This is the default for both installations.
In both installations I have xorg automatically configured (no xorg.conf file present in /etc/X11). In both systems the content of /usr/share/X11/xorg.conf.d is the same for what moitors are concerned (differences in mice and trackpad entries).
Unfortunately, the video configuration in Ubuntu 14.10 works out of the box. In particular I can plug in an external monitor/projector and it will fire-up the nvidia card (nouveau drivers) to power that monitor.
Debian 8.0 on the other hand does not even detect the external monitor.
I don't know where to start to solve the problems.
The hardware is as follows: the laptop (lenovo W530) features both an Intel integrated graphics card and an Nvidia K1000M. The VGA port is connected only to the Nvidia card (this is according to my online research, as I don't know how to check this).
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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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Aug 7, 2011
I am having problems getting my external monitor to work. When I plug in the monitor, both the laptop screen and the external monitor go black. When I unplug the monitor, the laptop screen works again.
When I startup with the external monitor plugged in, neither screen works or teh computer hangs or something.
I have had the external monitor going on a couple of occasions. I did manage to configure my monitors through System Settings > Display. I turned off the laptop monitor as I just want to use the external. But after rebooting, things didn't work.
I have a Thinkpad E420, Fedora 15
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Aug 11, 2011
I have an external monitor connected to my laptop (extended display). I always drag the Totem player from the laptop screen to external monitor to watch video files. I wonder, if the Totem player can be set to open in the external monitor automatically, everytime I open it?
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Jan 2, 2010
I have formatted (primary/ntfs) an old HD 80G and connected it by a USB cable to my laptop w/c is multi booted. I want to use it for back-up.
The external HD is detected and mounted automatically in Debian Lenny, Mint 7, openSUSE, Mandriva and even xp. However, no detection was found in Fedora 10.
In connection with this. May I please ask for help on how to check and understand why my Fedora partition failed to detect and mount the external HD?
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Dec 14, 2010
I have a ViewSonic (VA1703w) LCD and Fedora 14 is not detecting it. I want to change the resolution but it is fixed to 1024x768. I have also tried to add the resolution in xorg.conf but no effect.
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Oct 28, 2010
I just upgraded, and when I rebooted I could see that it was booting but after the initial phase I got a blank screen.
I went to prompt and tried xrandr to which I got the error : Can't open display.
What does that mean, and how do I fix this? I guess that my monitor is not properly identified or is not identified at all.
Does anyone know what I can do?
Went to /etc/gdm to find xorg.conf but it is not there. In etc/X11 I have an xorg.conf
The contents are :
Section "Monitor"
Identifier "Configured Monitor"
EndSection
Section "Screen"
[Code].....
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Jan 22, 2011
I got some troubles with my external VGA output of a Notebook. I tried various things (see below) but now I ran out of ideas. I studied the sticky post in this forum about configuring graphics cards but unfortunately this gave me no new hints. My System:
Fujitsu Siemens Lifebook E Series
OpenSuse 11.3 (i586, 32Bit)
Graphics: Intel 965GM
I found lots of questions and solutions concerning the 965GM but they all are just about configuring the VGA monitor/screen in Xorg.conf.d / xrandr. I'd LOVE to do so but in my case the VGA outout isn't even detected for some reason (please see details below) Summary of my findings up to now:
[code]......
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Sep 23, 2010
i have centos Linux server running with kernel version 2.6.18-164.el5 and release is CentOS release 5.4 (Final). The problem is when i connect external harddrive which is seaget free agent to this box, it doesnot detect . fdisk -l doesnot show any such partition.
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Jun 1, 2010
So I have a Samsung monitor at work (model 2343BWX) that I use in addition to my laptop screen. My computer is a T500 think pad. When I boot into ubuntu 10.04 from previously shutting down the computer in ubuntu I can't detect the monitor. If I however boot first into windows (I don't even have to enter my password, I can just press shutdown on the menu instead of logging in, and then boot into ubuntu) and it auto detects the monitor.
I have tried going to System -> Preferences Monitors and clicking "Detect Monitors" it doesn't work. Anyone know how this could be?
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Jul 7, 2010
I have installed (successfully) Ubuntu 10.04 ppc on my powerpc g4 mac. 400mhz, 1g ram. Its the blue model. It works great, but it does not detect my monitor, and I can not change the settings past 800 X 600. I am using a Dell 19 inch monitor. Analog input (not DVI yet) resolution 12080 x 1024 60hz. I believe I need to change the info in the xconfig file (but I don't know to what or how), and I may not be saying that correctly.
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Jul 11, 2010
My Ubuntu server box, has a Iiyama prolite LCD, 22", 1680x1050, that had not problem at all since... I can remember. Since yesterday, after a restart, xserver started in 640x480, with only 320x240 as alternative.
I have latest nVidia drivers installed, and the main difference with last week, is that now, Display Configuration says CRT-1, unknown instead of Iiyama.
I've tried.
1. Uninstall xserver and reinstall.
2. dpkg reconfigure
3. Uninstall nVidia and come back to original Nouveau.
[Code]...
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Oct 31, 2010
I'm running 10.04 as a DVR (mythtv). If the computer boots with the TV off it won't detect the settings, and when I turn the TV on nothing displays. I have to ssh into the computer and reboot it to get it to detect the display.Any idea how I can go about solving this? How can I disable autodetect and force it to use a specific setting?
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Jan 4, 2010
My Toshiba 500Gb USB hard drive is not being detected anymore when i insert it in 9.10. It only started doing this from last week, it was fine before (and it works fine in Windows XP). The connections are fine and all, because when i type "lsusb", i see it as follows:
Bus 001 Device 003: ID 19d2:0063 ONDA Communication S.p.A.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 004: ID 0930:0b09 Toshiba Corp.
[code]...
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Jan 5, 2011
I have 1tb Seagate Freeagent NTFS External HD. I have Windows Vista Ultimate SP1 with dual boot as Ubuntu. I'm primarily a windows user, since i'm not that well acquainted with linux. External Hard Drive does not detect- when i connect it..it just gives a whirring sound and the "My Computer" window hangs. Figured out the cause- and temporary solution- The drive should do principle mount automatically. It won't if the file system is not "clean". That is possible if the drive was connected while you hibernated Windows, or if you did not properly disconnect the drive.
I booted with ubuntu and did the following-
sudo fdisk -l
and got the following:
Disk /dev/sdb: 1000.2 GB, 1000204884992 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x396e2b4d
Device Boot Start End Blocks Id System
/dev/sdb1 1 121601 976760001 7 HPFS/NTFS
Then I typed:
sudo mkdir /media/FreeAgent
sudo chmod 777 /media/FreeAgent
And wrapped it up with editing fstab with the following code:
#FreeAgent USB Drive
/dev/sdf1 /media/FreeAgent ntfs defaults 0 0
Now the browser window for the freeagent hard drive pops up and I can access everything. I try to shutdown the computer but it won't as long as the hard disk is connected. So I have to pull the usb out. And the problem remains the same. I want the hard disk to be detected normally on my windows/linux (like normal usbs work-plug it in and it works). Also have no clue how to work a temporary solution like this with windows yet. I have boot with ubuntu everytime and repeat these steps when I want to access it.
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Feb 21, 2011
Been using Ubuntu to extend the life of my hard drive. I'm not very familiar with the inner workings of Linux, but I know computers well.
My System:
- Ubuntu 10.04, gnome environment. Dual boot XP.
Problem:
- my external drive, WD essentials 2.2 TB, stopped working recently, about 6 months after installation of dual boot.
Facts:
- still detected, though SMART does not detect it.
- XP still detects it - cant access files though. *
- Ubuntu now detects a floppy drive, which I do not have.
- power still working.
- have tried a few different USB cables.
- happened around the time of several software updates. Maybe paranoia.
- had trouble with music playback.
Hypothesis:
- Drive is dying, cuz XP wont allow me in. *
- Something happened and it rolled back the drivers on the External HD.
- Somehow losing Voltage, though I dont know how. **
Have attempted:
- Disabling Floppy from bios.
- In Windows: disabling XP service pack 3, disabling Firewire 1394.
- Different USB cables. **
- Disconnecting all USB devices, except External HD. **
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