https://bugzilla.novell.com/show_bug.cgi?id=848748
https://bugzilla.novell.com/show_bug.cgi?id=848748#c4
--- Comment #4 from Pedro Albuquerque Santos 2013-11-05 02:18:18 UTC ---
I believe that I have pinpointed the source of the problem. It has to do with
the Intel driver. Both I and firebird (I spoke with him on IRC) are using Intel
GPUs. The current version of the driver defaults to the newer SNA acceleration.
This acceleration is still a little big buggy, e.g., it introduces some
artifacts on Firefox: https://bbs.archlinux.org/viewtopic.php?id=168823 I
experienced these artifacts while using an Arch Linux install a few days ago,
and they are also present on openSUSE. However, since they do not occur very
often and kept everything as it was.
Due to this empathy bug I started I thought that if X11 crashes it may well be
caused by a driver problem. So I decided to override the default SNA and switch
to UXA. And this change fixed the problem. Moreover, firebird also said to me
that he has another computer with an NVIDIA GPU that doesn't present this
issue.
After some close inspection, it seems that openSUSE 13.1 is currently using a
pre-release of the future 3.0 version of xf86-video-intel. The current version
was released 10 days ago
(https://build.opensuse.org/package/view_file/openSUSE:13.1/xf86-video-intel/...).
This version is actually newer than the one used by Arch Linux
(https://www.archlinux.org/packages/extra/x86_64/xf86-video-intel/) and was
made available "about a week ago" as firebird mentioned on his initial report.
All of this indicates that the problem is related to the x86-video-intel
driver, especially when using the default SNA mode. Also, considering that the
problem seems the be confined to GNOME when using the Adwaita theme (according
to what firebird said), it may be the case that Adwaita uses some function at
the GPU level that causes the crash, where some other GTK themes do not.
So, it seems that the bug manifests itself when using xf86-video-intel (SNA
mode) + Adwaita. If the problem only happens with Adwaita, it may be fixed by
patching it. But patching/downgrading xf86-video-intel seems to be a more
future proof solution (since whatever Adwaita is doing "kind of wrong" can in
fact be made by some other untested GTK theme/application combo that may crash
X11, which is something really critical.
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