xrender issue

[Chris Wilson]

On Fri, 04 Nov 2011 11:26:07 +0100, Hans-Peter Budek <peter.budek at gmx.de> wrote:
> Hi,
> if I set an alpha-map to a destination picture via
> XRenderChangePicture(s->Dpy, Dest, CPAlphaMap, &Att) ;
> the following XRenderComposite() call crash my X-server:
> 
> Backtrace:
> [  9911.289] 0: /usr/X11R6/bin/X (xorg_backtrace+0x37) [0x80e8997]
> [  9911.289] Segmentation fault at address (nil)
> [  9911.289]
> Fatal server error:
> [  9911.289] Caught signal 11 (Segmentation fault). Server aborting
> [  9911.289]
> [  9911.289]
> Please consult the The X.Org Foundation support
> 
> X.Org X Server 1.9.5
> [  9887.642] (II) Module intel: vendor="X.Org Foundation"
> [  9887.642]   compiled for 1.9.5, module version = 2.14.0
> 
> is this a known bug?
It is now. I'll have a fix shortly, though you will still be triggering
CPU fallbacks.

Do you mind describing you use-case for alphamaps and could you create a
little benchmark for your workload?
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre