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Thread: 10.4 upgrade - Fn F8 (external monitor flip) not working

  1. #1
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    Question 10.4 upgrade - Fn F8 (external monitor flip) not working

    I just upgraded from 9.10 to 10.4 on my Dell Latitude E6500.

    The laptop sits in a docking station.

    In 9.10 I would use Fn-F8 to switch to the external monitor. With 9.10 I did not have to do anything special to allow this switching to occur.

    After upgrading I can no longer use Fn-F8 to switch to the external monitor.

    Anyone have any ideas or can suggest what additional information I can provide to disgnose teh problem?

    thanks, David

  2. #2
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    Re: 10.4 upgrade - Fn F8 (external monitor flip) not working

    Also note Fn-F1 and Fn-<up/down arrow> are working, Fn-F2, Fn-F3 are not working.

    I see I have lost my old xorg.conf so not sure if there would have been keyboard settings in there that would have affected.

    .. oh and I did check System -> Preferences -> Keyboard .. [Layout] "Keyboard model is "Dell Latitude series laptop"
    Last edited by grigglestone; August 6th, 2010 at 02:00 AM.

  3. #3
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    Sep 2007
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    Re: 10.4 upgrade - Fn F8 (external monitor flip) not working

    I have the same problem on my Dell LATITUDE E6400. It doesn't matter whether the laptop is in its docking station or not, Fn F8 simply won't work.

    I'd love to see a solution to this problem as I'm about to use the computer to present slides in a class I'm teaching.

  4. #4
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    Ubuntu 11.10 Oneiric Ocelot

    Re: 10.4 upgrade - Fn F8 (external monitor flip) not working

    Quote Originally Posted by josefs View Post
    I have the same problem on my Dell LATITUDE E6400. It doesn't matter whether the laptop is in its docking station or not, Fn F8 simply won't work.

    I'd love to see a solution to this problem as I'm about to use the computer to present slides in a class I'm teaching.
    Hi,

    this may be silly and I'm not sure it will help as I haven't had the opportunity to try it myself. Last I tried using a beamer using Fn+F8 I just lost the screen...

    but how about

    System -> Preferences -> Monitors

    There's a "Detect Monitor" button in the centre of that window, does that do anything?

  5. #5
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    Re: 10.4 upgrade - Fn F8 (external monitor flip) not working

    Quote Originally Posted by frogo View Post
    Hi,

    this may be silly and I'm not sure it will help as I haven't had the opportunity to try it myself. Last I tried using a beamer using Fn+F8 I just lost the screen...

    but how about

    System -> Preferences -> Monitors

    There's a "Detect Monitor" button in the centre of that window, does that do anything?
    Unfortunately that doesn't do anything. But thanks anyway for the suggestion. I'm happy to try anything at this point.

  6. #6
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    Sep 2010
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    Re: 10.4 upgrade - Fn F8 (external monitor flip) not working

    Related problem/workaround: http://www.vanstormbroek.nl/blog/?p=33

  7. #7
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    Kubuntu 10.04 Lucid Lynx

    Re: 10.4 upgrade - Fn F8 (external monitor flip) not working

    *BUMP*

    I have a Dell E6500 (with nvidia Quadro NVS 160M GPU) with (k)ubuntu 10.04
    installed (and up-to-date), and upon which I've installed the proprietary
    nvidia driver (which seems to work fine (and sleep works)).

    Out-of-the-box most everything seems to work (sound & sound buttons,
    dim/brighten display, sleep button (fn+f1)), however, the display video switch
    fn+f8 does not work. [note: i do not use a docking station, rather, i use the
    video-out port]

    I've groveled through the ubuntu forums and web at large and see that other
    people have noted this but don't (yet) see a documented fix.

    fwiw, I also have a Dell D820 upon which I've run (k)ubuntu since ubuntu 6.10,
    and it's fn+f8 sleep button has always worked, and upon which I also am running
    ubuntu 10.04.


    So, I've done some poking about on both the D820 and the E6500 trying to figure
    out what is going on and what changed between the two systems that might be
    causing this.

    AFAICT, at least part of the issue is that they keyboard scan codes emitted by
    the E6500 keyboard are different (for at least some of the keys, fn+f8 in
    particular) than they are on the D820. It appears that the ACPI sleep
    initiation is not properly mapped to the scancodes emitted by the E6500 keyboard.

    For example, if a command shell is the active task (i.e. the insertion point is
    sitting at a command prompt), and one presses fn+f8, a character "p" is placed
    at the command prompt, as if one had typed "p".

    Using acpi_listen to investigate...

    Code:
     > sudo acpi_listen -c 1
    p
    ^C
    The above command should have exited on it's own after receiving an acpi event
    for fn+f8, but instead just a letter "p" was echoed and then I cntl-C'd out of
    it. For comparison, if I use acpi_listen again and press fn+upArrow (LCD
    brighten)...

    Code:
     > sudo acpi_listen -c 1
    video LCD 00000086 00000000
     >
    ..the event is received, displayed, and acpi_listen properly exits.

    So it seems the that an ACPI event isn't even being generated for fn+f8 on the
    E6500. Further poking about shows that the /lib/udev/keymaps/dell file is the
    same on both the D820 and the E6500 (should it be? (I'm doubting it)), and also
    that some of the various outputs of "dumpkeys" are the same on both systems.

    However, using "showkey" on both systems gives markedly different results,
    which are shown below.

    Does anyone know what might be going on and what I can do to get fn+f8 to
    properly switch video display on the E6500 ?

    thanks,

    =JeffH
    ------

    Code:
    On the D820:
    ------------
    
     > sudo showkey -s          # I pressed and released fn-f8 once
    kb mode was RAW
    [ if you are trying this under X, it might not work
    since the X server is also reading /dev/console ]
    
    press any key (program terminates 10s after last keypress)...
    0xe0 0x56 0xe0 0xd6 0xe0 0x56 0xe0 0xd6
    0xe0 0x56 0xe0 0xd6
    
     > sudo showkey            # pressed and released fn-f8 once, after releasing 
    enter key
    kb mode was RAW
    [ if you are trying this under X, it might not work
    since the X server is also reading /dev/console ]
    
    press any key (program terminates 10s after last keypress)...
    keycode  28 release    # Enter key release
    keycode 227 press      # pressed fn and nothing showed up here
                            #  until I also pressed fn8
    keycode 227 release    # while fn was still pressed,
                            # quickly released and got all three "press-release"
    keycode 227 press      # pairs listed here
    keycode 227 release
    keycode 227 press
    keycode 227 release
    
    
    
    
    On the E6500:
    -------------
    
     > sudo showkey -s         # I pressed and released fn-f8 once
    kb mode was RAW
    [ if you are trying this under X, it might not work
    since the X server is also reading /dev/console ]
    
    press any key (program terminates 10s after last keypress)...
    0x9c
    p0xe0 0x5b 0x19 0x99      # Note the "p" char
    0xe0 0xdb
    
    
     > sudo showkey
    kb mode was RAW
    [ if you are trying this under X, it might not work
    since the X server is also reading /dev/console ]
    
    press any key (program terminates 10s after last keypress)...
    keycode  28 release  # Enter key release (?)   scancode 0x9c ?
    pkeycode 125 press   # fn ?  scancodes 0xe0 0x5b ?
    keycode  25 press    # f8 ?  scancode 0x19 ?
    keycode  25 release  # f8 ?  scancode 0x99 ?
    keycode 125 release  # fn release ?  scancodes 0xe0 0xdb ?

  8. #8
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    Kubuntu 10.04 Lucid Lynx

    Exclamation Re: 10.4 upgrade - Fn F8 (external monitor flip) not working

    **BUMP**

    ah ha (!!), there's a bug entered ( Bug #585258 ) for this problem ---
    switching to external VGA monitor does not work anymore on dell precision M4400 and Ubuntu 10.04
    https://bugs.launchpad.net/ubuntu/+s...ux/+bug/585258
    ..but its priority is only "medium" priority

    Perhaps it'd help if everyone who peruses this thread goes over the launchpad and adds a "me too" note to the bug ?

    Let's get this silly/annoying/frustrating thing fixed...

    thanks!

    =JeffH

  9. #9
    Join Date
    Mar 2013
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    Re: 10.4 upgrade - Fn F8 (external monitor flip) not working

    I am seeing this issue on Dell Latitude E6420 with 12.04. Issue 585258 is closed as Won't Fix. Is there a patch for this?

  10. #10
    Join Date
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    Kolkata India
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    Hidden!
    Distro
    Ubuntu

    Re: 10.4 upgrade - Fn F8 (external monitor flip) not working

    Old thread closed, please feel free to start a fresh thread with more details.
    “Progress is made by lazy men looking for easier ways to do things”
    — Robert A. Heinlein

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