14 Feb 2011, 9:48pm
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  • Flickering Screen with ATI Radeon X1400 and Ubuntu

    EDIT: ATI Radeon X1400 seems to work fine again since Ubuntu 11.04.

    There is another fix to the “well known” issues with the ATI Radeon X1400 and Ubuntu 10.04 to 10.10 besides the one posted about one year ago (see here).
    The pre­vi­ous fix kept the graph­ics card work­ing nor­mally but harmed the over­all oper­at­ing system’s sta­bil­ity, so here is another fix based on dis­abling all 3D fea­tures of the device to get rid of the flick­er­ing screen.

    It’s up to you to choose what you are able to live with­out
    a) The desk­top set­tings panel and “Seg­men­ta­tion fault” errors now and then, or
    b) 3D accel­er­a­tion (does not harm video play­back or any other basic OS functionalities)

    For solu­tion a) see this.
    For b) cre­ate this file: /etc/modprobe.d/radeon-kms.conf — and add fol­low­ing content

    options radeon modeset=0

    Solu­tion found here (in German).

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