[Bug 5641] New: Xinerama blocks chipset and GLX fails on Asus M2400N/Centrino/855GM

[<bug...@bu...>]

http://bugzilla.kernel.org/show_bug.cgi?id=5641

           Summary: Xinerama blocks chipset and GLX fails on Asus
                    M2400N/Centrino/855GM
    Kernel Version: 2.6.14.2
            Status: NEW
          Severity: high
             Owner: dri...@ke...
         Submitter: aa...@qu...


Most recent kernel where this bug did not occur: 2.6.13.1
Distribution: Using Vanilla kernel, not stack. (ArchLinux)
Hardware Environment: Asus M2400N, Centrino, Intel 855GM
Software Environment: Linux/X.org/KDE

Problem Description:
GLX seems to be buggy. glxgears work flawlessly. glxinfo says direct rendering
is on. However, OpenGL screensavers and apps either fail immediately, or produce
a strange output, using only the upper part of the screen. Some of them
segmentation faulted soon afterwards.

Xinerama does not work any more. The double-headed layout cannot be used any
more. An attempt to load X with double-headed layout results in blocking the
chipset and the machine has to be rebooted to make X work again.

Steps to reproduce:
Launch X with KDE or Gnome and try some GL screensavers like Euphoria. Try
startx with a double-headed layout or Xinerama turned on.

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