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http://bugs.xfree86.org/show_bug.cgi?id=512
------- Additional Comments From [EMAIL PROTECTED] 2004-04-07 16:15 -------
Looks like the source of the problem is in xm_api.c:645 (in 4.3) where we try to
malloc space for backimage->data but the width is 0 and the height is 0 so we
malloc 0 which returns an error. This sets ->backimage = Null and also
->backpixmap = Null. Later code assumes at least one must be a valid pointer.
I've traced this back as far as I can (so far). I can break at glxcmds.c:524
With Xinerama disabled, I print:
((__MESA_buffer)glxPriv->glPriv.private)->xm_buf->mesa_buffer.Width
and it = 1600 (the width of one of my screens).
With Xinerama enabled, that value = 0 (which causes the 0 malloc later).
Can someone tell me where xm_buf->mesa_buffer.Width gets initialized? I'd like
to see why it is that it gets a bogus value when I have Xinerama on.
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