ubuntu-x-swat team mailing list archive

[Pauli <suokkos@xxxxxxxxx>]

On Thu, Feb 18, 2010 at 11:41 PM, stefan.witwicki <witwicki@xxxxxxxxx> wrote:
> Pauli,
>
> Thanks for the help.
>
>> fglrx-kernel-source is not part of driver that you want. You should
>> remove it.
>
> After removing that package, I was back to the blackscreen problem
> (e.g. display showing up only on the external monitor), but my visual effects (compiz) were indeed working!
>
>> The initial black screen problem looks like kernel modesetting bug. So
>> workaround would be booting with radeon.modeset=0 to use old UMS driver.
>
> This workaround fixed the blackscreen problem!  However, compiz doesn't seem to play nicely with the old driver:
> ---
> $ compiz
> WARNING: Application calling GLX 1.3 function "glXCreatePixmap" when GLX 1.3 is not supported!  This is an application bug!
> ^X^CWARNING: Application calling GLX 1.3 function "glXDestroyPixmap" when GLX 1.3 is not supported!  This is an application bug!
> ---
> The visual result is that the far right section of the display area (effecting about 2/3 the screen of one of my monitors) wasn't displaying properly... a colorful lack of refreshing and some blackness.
>

How big is your dual head?

default virtual size maybe too small so you have to set it to size
that your full desktop should be.
see http://wiki.debian.org/XStrikeForce/HowToRandR12 for details

> So it seems that at the moment, I can't have my cake (compiz) and eat it
> too (on dual monitors).
>

KMS would auto adjust virtual desktop sizes when you add monitors to
system. If you want KMS you could try mainline kernel builds from
https://wiki.ubuntu.com/KernelTeam/MainlineBuilds

-- 
[Lucid alpha2] ATI Mobility Radeon 9600 not displaying on LVDS
https://bugs.launchpad.net/bugs/522394
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