[Bug 28671] Seg. fault and Oops with Radeon KMS (v2.6.34) on PPC ATI Radeon AGP r420 JH.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=28671

--- Comment #10 from Alex Deucher <agd5f at yahoo.com> 2010-06-22 22:51:41 PDT ---
(In reply to comment #7)
> Ah, I had tried NoAccel previously with limited success, however with your
> patch applied it works much better. The window manager and apps are visible and
> there is no lockup when I switch VT's. 
> 
> However, X does seg fault when I quit the wm. I have attached the backtrace
> found the Xorg.log from that seg fault in case it is useful and the lspci
> output you requested.
> 

That might be fixed in xf86-video-ati from git master.

As to the GPU lockup, You might try disabling EXA accel routines to see if you
can narrow down the problem.  E.g.,
Option "EXANoComposite"
Option "EXANoDownloadFromScreen"
Option "EXANoUploadToScreen"
in the device section of your xorg config.

> The connectors on the card are quite different from the generic connector table
> the driver seems to use. The connectors are DVI + ADC (Apple Display Connector
> DVI+USB for Cinema Displays; it was available prior to 2005). In case it is
> relevant, I am currently using the DVI outpt with a VGA adaptor since I ran out
> of DVI cables.
> 
> Please let me know if I can provide anything else.

We'll need to come up with a custom connector table.  I will need your help
testing to make sure I got the encoder and ddc line routing correct.

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