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  1. #1
    Join Date
    Nov 2010
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    51

    Virtual Terminals broken?

    When I press ctl-alt-Fn I get a black screen instead of a login for a virtual terminal. The monitor says "no signal" after a few seconds. A restart is necessary at this point - ctl-alt-sysrq-b usually works.

    Anyone else seeing this? Is there a known fix or workaround?

  2. #2
    Join Date
    Mar 2011
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    5,093

    Re: Virtual Terminals broken?

    It seems to work fine for me. No issues. Did you try different Fn keys??

  3. #3
    Join Date
    Nov 2010
    Posts
    51

    Re: Virtual Terminals broken?

    Quote Originally Posted by nonamedotc
    It seems to work fine for me. No issues. Did you try different Fn keys??
    Yes, I've tried them all. Luckily, I can get back to the X session with ctl-alt-F1, so I don't have to reboot.

    I wonder if it's the proprietary nvidia drivers... what graphics are you using?

    [edit: I notice that there are new nvidia drivers this morning. Let's see if they help matters...]

    ---------- Post added at 09:56 AM ---------- Previous post was at 08:49 AM ----------

    Turns out that the problem is with the proprietary nvidia drivers. I reverted to nouveau, and no more problem.

    The nvidia drivers were updated this morning, but didn't solve the problem.

    Oh well!
    Last edited by sgage; 15th April 2012 at 01:52 PM.

  4. #4
    Join Date
    Jan 2006
    Posts
    2,799

    Re: Virtual Terminals broken?

    This could affect the virtual terminals problem with nvidia. Do you have a line in /boot/grub2/grub.cfg like:

    set gfxpayload=1024x768x32

    I put it right before the insmod lines.

  5. #5
    Join Date
    Dec 2011
    Posts
    57

    Re: Virtual Terminals broken?

    Intel Graphics here (i5-2500), similar issue: Ctrl-F1 & F2 -- switch to black. Ctrl-F3: go to X; Ctrl F4-6 start virtual terminal. 7 and beyond nothing (blackness). Is this specific to fedora (or F16) -- my experience is with Mandriva where 1-6 was virtual and 7 and beyond for X (normally only VT7; VT8 and beyond for switch user).

  6. #6
    Join Date
    Nov 2010
    Posts
    51

    Re: Virtual Terminals broken?

    Quote Originally Posted by pindakoe
    Intel Graphics here (i5-2500), similar issue: Ctrl-F1 & F2 -- switch to black. Ctrl-F3: go to X; Ctrl F4-6 start virtual terminal. 7 and beyond nothing (blackness). Is this specific to fedora (or F16) -- my experience is with Mandriva where 1-6 was virtual and 7 and beyond for X (normally only VT7; VT8 and beyond for switch user).
    Actually, in F16 1 is X and 2-7 are virtual.

    ---------- Post added at 12:24 PM ---------- Previous post was at 11:43 AM ----------

    Quote Originally Posted by JEO
    This could affect the virtual terminals problem with nvidia. Do you have a line in /boot/grub2/grub.cfg like:

    set gfxpayload=1024x768x32

    I put it right before the insmod lines.
    Tried it - no joy. Interestingly, I can get a VT if I try right after logon. A couple of minutes later and it doesn't work any more. Strange...

  7. #7
    Join Date
    Nov 2010
    Posts
    51

    No Virtual Terminals with nvidia proprietary drivers

    This is a long-standing problem. With the nouveau drivers, VT's work fine. With the nvidia drivers installed, no VT's. Does anyone have any insight into this problem?

  8. #8
    Join Date
    Apr 2004
    Posts
    194

    Re: No Virtual Terminals with nvidia proprietary drivers

    what fails for you specifically?

  9. #9
    Join Date
    Nov 2010
    Posts
    51

    Re: No Virtual Terminals with nvidia proprietary drivers

    Quote Originally Posted by mtk
    what fails for you specifically?
    When I have the nvidia proprietary drivers installed, and try to get to a Virtual Terminal using ctl-alt-Fx, the screen goes black and the display gives the "no signal" msg. I can ctl-alt-F1 back to my X session, however.

    With the nouveau drivers, it all works as expected.

    I reported this problem a month ago in the General Support forum (http://forums.fedoraforum.org/showth...ghlight=nvidia), but got no help there. The problem persists.

    This is F17 32-bit, Nvidia Geforce 8500GT video.

  10. #10
    Join Date
    Apr 2004
    Posts
    194

    Re: No Virtual Terminals with nvidia proprietary drivers

    hmm... so systemd. i wonder if you need to arrange for getty's to run on those VT's? by adding links
    in the /usr/lib/systemd/system/getty.target.wants directory? /mark

  11. #11
    Join Date
    Aug 2009
    Location
    Waldorf, Maryland
    Posts
    7,346

    Re: No Virtual Terminals with nvidia proprietary drivers

    I don't think the video signal depends on there being an active getty on the VT.

    Normally when you select an unused VT you get a blinking cursor in the upper left corner, and nothing else.

    "No video" from the monitor states that there is no signal.

  12. #12
    Join Date
    Apr 2004
    Posts
    194

    Re: No Virtual Terminals with nvidia proprietary drivers

    you're right. leigh, do you know anything about this?

  13. #13
    Join Date
    Apr 2010
    Posts
    80

    Re: No Virtual Terminals with nvidia proprietary drivers

    hm...strange...i do have nvidia drivers installed, but i do have my VTs. Resolution drops from full HD to, well, very low (1280x800 i think), by VTs are there.

  14. #14
    Join Date
    Nov 2010
    Posts
    51

    Re: No Virtual Terminals with nvidia proprietary drivers

    Does anyone have any further info on this issue? It is still a problem.

  15. #15
    Join Date
    May 2010
    Location
    Midwest USA
    Age
    50
    Posts
    514

    Re: No Virtual Terminals with nvidia proprietary drivers

    I've seen something similar, if I was to log out and switch users, the act of doing so would cause a de-sync of monitor and computer causing a blank screen A simple input toggle, or powering off the monitor and turning back on again resyncs

    Try switching to a VT and then turning your monitor off and onn again.

    CronoCloud

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