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Thread: No display...

  1. #1
    Join Date
    Feb 2009
    Beans
    43
    Distro
    Ubuntu 9.10 Karmic Koala

    No display...

    Hi All,

    I have no clue where to start with this issue... any ideas would be helpful. Here's the scoop:

    I've been running fine (9 months) with my new LG LDC monitor. Two weeks ago I decided to also connect my old ViewSonic monitor. Ever since unplugging the ViewSonic, the LG Monitor stays black after going past the Grub menu where I select Ubuntu. The only way I can get it to display the Ubuntu login screen is to physically unplug the monitor and plug it back in. Maybe something in the boot up process is not sensing the display? Or perhaps first waiting for the now disconnected ViewSonic???

    Any ideas???
    Learning Linux, one mistake at a time

  2. #2
    Join Date
    Nov 2009
    Location
    East Anglia
    Beans
    415
    Distro
    Xubuntu

    Re: No display...

    Quote Originally Posted by ian2112 View Post
    Hi All,

    I have no clue where to start with this issue... any ideas would be helpful. Here's the scoop:

    I've been running fine (9 months) with my new LG LDC monitor. Two weeks ago I decided to also connect my old ViewSonic monitor. Ever since unplugging the ViewSonic, the LG Monitor stays black after going past the Grub menu where I select Ubuntu. The only way I can get it to display the Ubuntu login screen is to physically unplug the monitor and plug it back in. Maybe something in the boot up process is not sensing the display? Or perhaps first waiting for the now disconnected ViewSonic???

    Any ideas???
    Try:
    Code:
    sudo dpkg-reconfigure -phigh xserver-xorg
    with the LG monitor plugged in.

    H

  3. #3
    Join Date
    Feb 2009
    Beans
    43
    Distro
    Ubuntu 9.10 Karmic Koala

    Re: No display...

    Hi

    I gave the command a try. The command was accepted error free, but didn't resolve my problem. I tried restarting my desktop I still need to disconnect and re-connect the monitor cable.

    A couple other questions / thoughts...

    - Are there any commands I can issue that could tell me more information about the communications between my desktop and the monitor ("System / Preferences / Display" isn't all that helpful)?

    - The command that I tried... can I eliminate anything (potentially) as the source of the problem?

    - Any other thoughts or ideas?

    As always, I appreciate the guidance...

    Thx,
    Ian
    Learning Linux, one mistake at a time

  4. #4
    Join Date
    Nov 2009
    Location
    East Anglia
    Beans
    415
    Distro
    Xubuntu

    Re: No display...

    Quote Originally Posted by ian2112 View Post
    Hi
    A couple other questions / thoughts...

    - Are there any commands I can issue that could tell me more information about the communications between my desktop and the monitor ("System / Preferences / Display" isn't all that helpful)?

    - The command that I tried... can I eliminate anything (potentially) as the source of the problem?

    - Any other thoughts or ideas?

    As always, I appreciate the guidance...

    Thx,
    Ian
    You could try:
    Code:
    sudo ddcprobe
    or
    sudo hwinfo --monitor
    (which assume you've installed the xresprobe and hwinfo packages). Otherwise, have you got an /etc/X11/xorg.conf file that's causing problems?

    H

  5. #5
    Join Date
    Feb 2009
    Beans
    43
    Distro
    Ubuntu 9.10 Karmic Koala

    Re: No display...

    Here's the contents of ddcprobe. Nothing seems out of place, but I also don't fully appreciate what I'm looking at...

    Also - tonight I tried booting into Windows Vista and it worked no problem, so I know the issue isn't with the hardware itself. For some reason... Ubuntu isn't correctly detecting the monitor.


    vbe: VESA 3.0 detected.
    oem: ATI ATOMBIOS
    vendor: (C) 1988-2005, ATI Technologies Inc.
    product: RV670 01.00
    memory: 16384kb
    mode: 640x400x256
    mode: 640x480x256
    mode: 800x600x256
    mode: 1024x768x256
    mode: 1280x1024x256
    mode: 640x480x64k
    mode: 800x600x64k
    mode: 1024x768x64k
    mode: 1280x1024x64k
    mode: 320x200x64k
    mode: 1600x1200x256
    mode: 1600x1200x32k
    mode: 1600x1200x64k
    edid:
    edid: 1 3
    id: 56ff
    eisa: GSM56ff
    serial: 0002b99f
    manufacture: 7 2009
    input: separate sync, sync on green, analog signal.
    screensize: 48 27
    gamma: 2.200000
    dpms: RGB, active off, suspend, standby
    timing: 720x400@70 Hz (VGA 640x400, IBM)
    timing: 640x480@60 Hz (VGA)
    timing: 640x480@75 Hz (VESA)
    timing: 800x600@60 Hz (VESA)
    timing: 800x600@72 Hz (VESA)
    timing: 800x600@75 Hz (VESA)
    timing: 1024x768@87 Hz Interlaced (8514A)
    timing: 1024x768@75 Hz (VESA)
    ctiming: 1680x1680@60
    ctiming: 1280x1024@75
    ctiming: 1280x1024@60
    ctiming: 1152x864@75
    dtiming: 1920x1080@59
    dtiming: 1920x1080@67
    monitorrange: 30-83, 56-75
    monitorname: W2243
    Learning Linux, one mistake at a time

  6. #6
    Join Date
    Feb 2009
    Beans
    43
    Distro
    Ubuntu 9.10 Karmic Koala

    Re: No display...

    I upgraded from 9.10 to 10.04 and this seems to have resolved my issue. It would have been nice to understand the cause and fix... but better than nothing!!!

    Thanks for the help,
    Ian
    Learning Linux, one mistake at a time

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