Bug 6253

Summary:	XGetImage() doesn't work well with XQuartz
Product:	xorg	Reporter:	Ian Osgood <iano>
Component:	Server/DDX/XQuartz	Assignee:	Jeremy Huddleston Sequoia <jeremyhu>
Status:	RESOLVED MOVED	QA Contact:	Xorg Project Team <xorg-team>
Severity:	normal
Priority:	medium	CC:	dmzettl, jay.bijak, shailajalabade19
Version:	unspecified
Hardware:	All
OS:	Mac OS X (All)
Whiteboard:
i915 platform:		i915 features:

Description Ian Osgood 2006-03-14 06:02:55 UTC

Specifically, when invoked with argument 1 to get shared memory, lissajoux will
hang in its first attempt to force the cookie returned by XCBImageSHMGet(). 
This call is hung inside XCBShmGetImage(), which is in turn hung in the bowels
of XCB waiting for a reply which apparently never comes.

Testing on Mac OS X 10.4 against both Apple's shipping XFree86-based server and the latest X.org server 
running on Bart's box.  Exact same symptom as bug 5375, xcb_image.c:471 call to 
XCBShmGetImageReply(), but the hang does not occur running "lissajoux 1" on Linux-x86.

Comment 1 Ian Osgood 2006-04-30 02:46:57 UTC

At some point, it stopped hanging. Recently, XCBShmGetImageReply() started returning a NULL reply (and 
not filling in an error) instead causing an assert in lissajoux.

I'm not sure when this behavior changed. Possible commits:
c29cb222f328baa17af3443695a29c245f4a9ba5

Comment 2 Ian Osgood 2007-04-13 15:32:09 UTC

As it is now written, lissajoux 1 fails on both PPC and Intel Macs with this error output:

ShmGetImageReply error 2
lissajoux.c:56: failed assertion `i'

so endianness is not the problem.  (2 is XCB_BAD_VALUE)

Comment 3 chemtech 2013-03-26 08:02:16 UTC

Ian Osgood,
Do you still experience this issue with newer soft ?
Please check the status of your issue.
Or close this bug.

Comment 4 Jeremy Huddleston Sequoia 2016-05-29 17:29:37 UTC

This has been a longstanding issue with XQuartz that nobody has ever cared enough to fix.

Comment 5 Jeremy Huddleston Sequoia 2016-12-31 21:34:05 UTC

*** Bug 99218 has been marked as a duplicate of this bug. ***

Comment 6 GitLab Migration User 2018-12-13 18:30:44 UTC

-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/xorg/xserver/issues/186.

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