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Thread: Can't boot (black screen), except using recovery + resume (Pavillion DM4)

  1. #1
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    Can't boot (black screen), except using recovery + resume (Pavillion DM4)

    I have a Pavillion DM4.

    I recently upgraded to Oneiric. This is when the problem began.

    When I boot, if I select the normal kernal (3.0.0.16), I get the Ubuntu image with the loading dots, but then I get a black screen, not the login screen. I cannot CTRL-ALT-F1 to the prompt.

    However, I can boot correctly by booting that kernel in recovery mode, giving the boot messages, and then selecting the "Resume" recovery option, which correctly loads the login manager.

    Another issue is that when my laptop hibernates/suspends (I'm not sure which), and I reactivate it, I am stuck with a black screen.

    How do I resolve this?

  2. #2
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    Re: Can't boot (black screen), except using recovery + resume (Pavillion DM4)

    I have a dm4 and I had a problem that was almost the same...fine install on 11.10 and 12.04 then a black screen on boot...I had to add nomodeset to the boot options to give me a screen...this did it for me:

    http://ubuntuforums.org/showthread.php?t=1613132

    now I need to figure out how to get the correct screen resolution...my dm4 only has the Intel integrated graphics.
    rt
    cheap hardware....LOTS of it

  3. #3
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    Re: Can't boot (black screen), except using recovery + resume (Pavillion DM4)

    I had a color/screen issue too; nomodeset locks your resolution to VESA.

    Let me see what i did to fix it...
    Oh; i remember:
    sudo to root andmodify /etc/default/grub
    There should be a line starting with: #GRUB_GFXMODE replace it with this:
    Code:
    GRUB_GFXMODE=text
    and issue a sudo update-grub
    Your bootscreen won't look to pretty (it's like viewing with low res) but it'll work.
    (note: remove nomodeset and if you don't mind the looks, remove quiet and splash as well; you'll see the kernel messages scroll by, though i find that it looks kinda cool and hackerish)

    (I'm giving you this info from my exp with graphics problems)

  4. #4
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    Re: Can't boot (black screen), except using recovery + resume (Pavillion DM4)

    Though i'm assuming your pc will still boot;
    if it doesn't, i'd like to know if your caps-lock kb-light will start blinking; it'll mean there's kernel issue removing the quiet and splash bootopts should let the kernel display it's deathscreams and tell you what's wrong; like always: google is your friend)

  5. #5
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    Re: Can't boot (black screen), except using recovery + resume (Pavillion DM4)

    roelforg...Thank you! You explained why I am trapped in the wrong resolution (VESA)...I'll try your fix later on today when I have more time...again...Thank you!
    rt
    cheap hardware....LOTS of it

  6. #6
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    Re: Can't boot (black screen), except using recovery + resume (Pavillion DM4)

    Quote Originally Posted by rtalcott View Post
    roelforg...Thank you! You explained why I am trapped in the wrong resolution (VESA)...I'll try your fix later on today when I have more time...again...Thank you!
    rt
    Sure man,
    We're all here to ask and answer questions.

    Feel free to ask when there are more problems.
    And i let me tell you:
    My pc has a 21.5" screen hooked up to it, max resolution 1920*1080;
    when nomodeset is on, resolution drops to 1024*768 and won't get higher until i disable nomodeset.

  7. #7
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    Re: Can't boot (black screen), except using recovery + resume (Pavillion DM4)

    Quote Originally Posted by roelforg View Post
    sudo to root andmodify /etc/default/grub
    There should be a line starting with: #GRUB_GFXMODE replace it with this:
    Code:
    GRUB_GFXMODE=text
    and issue a sudo update-grub
    Your bootscreen won't look to pretty (it's like viewing with low res) but it'll work.
    (note: remove nomodeset and if you don't mind the looks, remove quiet and splash as well; you'll see the kernel messages scroll by, though i find that it looks kinda cool and hackerish)
    So I should follow JUST your instructions and NOT do nomodeset?
    Just want to be clear.

  8. #8
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    Re: Can't boot (black screen), except using recovery + resume (Pavillion DM4)

    IMO nomodeset isn't a great solution but at least I got away from the black screen but I cannot get away from 1024x768 and that's still a problem...I'm also running 12.04 Alpha and the hardware in general is not happy yet.

    However...at this point I have not tried anything else.
    rt
    cheap hardware....LOTS of it

  9. #9
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    Re: Can't boot (black screen), except using recovery + resume (Pavillion DM4)

    Quote Originally Posted by rtalcott View Post
    IMO nomodeset isn't a great solution but at least I got away from the black screen but I cannot get away from 1024x768 and that's still a problem...I'm also running 12.04 Alpha and the hardware in general is not happy yet.

    However...at this point I have not tried anything else.
    rt
    I don't wanna troll here.
    But there's a special forum for 12.04 where they know more about 12.04 than i do.
    They'll probably be able to help you much better.

    EDIT: Wait, did you mean multiboot 11.10 - 12.04? The 11.10 i can help you with, the 12.04 not.
    "Everything that has a beginning, has an end." --an unexpectedly wise wallpaper

  10. #10
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    Re: Can't boot (black screen), except using recovery + resume (Pavillion DM4)

    Quote Originally Posted by roelforg View Post
    I had a color/screen issue too; nomodeset locks your resolution to VESA.

    Let me see what i did to fix it...
    Oh; i remember:
    sudo to root andmodify /etc/default/grub
    There should be a line starting with: #GRUB_GFXMODE replace it with this:
    Code:
    GRUB_GFXMODE=text
    and issue a sudo update-grub
    Hmmm.... I tried this and I still get a black screen and can't do anything.
    This is after the initial Ubuntu loading image.
    How can I figure out what is going on?

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