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Thread: HDMI output doesn't work on Laptop even though TV gets detected

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  1. #1
    Join Date
    Dec 2007
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    Germany
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    364

    Default HDMI output doesn't work on Laptop even though TV gets detected

    Hi there,
    So after years of having no real issues with Catalyst, recently HDMI output stopped working on my laptop (which has a Radeon HD 4200). I can't tell for sure what caused it, it was likely either my distribution update from openSUSE 12.1 to 12.2 or a driver update from an older Catalyst version to 12.6-legacy. HDMI output surely worked on my setup before though with openSUSE 12.1 and an older Catalyst release.
    I don't get any output at all on my TV even though it seems to be recognized properly. Here's a screenshot from KDE's display configuration:


    LVDS is my laptop's display, DFP1 is the TV I'm trying to connect. Strangely enough when I select "Identify Outputs", the DFP1 label appears on my laptop display (yes I'm sure my laptop is LVDS because that's what gets displayed when no TV is connected). Disabling the laptop display and only using the TV display doesn't help, either.

    I'm really kinda lost at this because I don't even have any idea what logs to look at. Neither Xorg.log nor dmesg seem to show any useful information, but I pastebin'ed Xorg.log anyway at http://pastebin.com/nduf6upj because I'm sure other people will have a better idea of what's going on there.
    I'd be really happy if anyone could point me in the right direction here, thanks!

  2. #2

    Default

    Options:
    1. Check this thread: http://phoronix.com/forums/showthrea...-the-same-time
    2. Check CCC display configuration.
    3. Uninstall Catalyst and use radeon driver instead.

  3. #3
    Join Date
    Dec 2007
    Location
    Germany
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    364

    Default

    Quote Originally Posted by RussianNeuroMancer View Post
    Options:
    1. Check this thread: http://phoronix.com/forums/showthrea...-the-same-time
    2. Check CCC display configuration.
    3. Uninstall Catalyst and use radeon driver instead.
    Thanks for the reply.
    1. I don't think the thread applies in my case as apparently the secondary display is being recognized properly (it even says "LG TV" and stuff), but it gets no signal (i.e. I don't get any picture at all to get displayed).
    2. Played around a bit there, no result. Tried all of a) cloning b) multi-desktop c) single-desktop.
    3. Using radeon is not an option for me at this stage.

    Btw, this is my xorg.conf: http://pastebin.com/DcxuTcPy
    Last edited by NeoBrain; 10-28-2012 at 04:33 PM.

  4. #4

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    Quote Originally Posted by NeoBrain View Post
    1. I don't think the thread applies in my case as apparently the secondary display is being recognized properly (it even says "LG TV" and stuff), but it gets no signal (i.e. I don't get any picture at all to get displayed).
    2. Played around a bit there, no result. Tried all of a) cloning b) multi-desktop c) single-desktop.
    It's not hardware issue for sure? You may check this using LiveCD or bootable flash-driver.

  5. #5
    Join Date
    Oct 2012
    Posts
    2

    Default

    You may check this using LiveCD or bootable flash-driver.
    Last edited by kathlyyoun; 10-29-2012 at 04:10 AM.

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